Laboratory experiments of speciation

Last updated
A simplification of an allopatric speciation experiment where two lines of fruit flies are raised on maltose and starch media Drosophila speciation experiment.svg
A simplification of an allopatric speciation experiment where two lines of fruit flies are raised on maltose and starch media

Laboratory experiments of speciation have been conducted for all four modes of speciation: allopatric, peripatric, parapatric, and sympatric; and various other processes involving speciation: hybridization, reinforcement, founder effects, among others. Most of the experiments have been done on flies, in particular Drosophila fruit flies. [1] However, more recent studies have tested yeasts, fungi, and even viruses.

Contents

It has been suggested that laboratory experiments are not conducive to vicariant speciation events (allopatric and peripatric) due to their small population sizes and limited generations. [2] Most estimates from studies of nature indicate that speciation takes hundreds of thousands to millions of years. [3] On the other hand, many species are thought to have speciated faster and more recently, such as the European flounders ( Platichthys flesus ) that spawn in pelagic and demersal zones—having allopatrically speciated in under 3000 generations. [4]

Table of experiments

Six publications have attempted to compile, review, and analyze the experimental research on speciation:

  1. John Ringo, David Wood, Robert Rockwell, and Harold Dowse in 1985; [5]
  2. William R. Rice and Ellen E. Hostert in 1993; [6]
  3. Ann-Britt Florin and Anders Ödeen in 2002; [2]
  4. Mark Kirkpatrick and Virginie Ravigné in 2002; [7]
  5. Jerry A. Coyne and H. Allen Orr in 2004; [1] and
  6. James D. Fry in 2009. [8]

The table summarizes the studies and data reviewed in these publications. It also references several contemporary experiments and is non-exhaustive. In the table, multiple numbers separated by semi-colons in the generations column indicate that multiple experiments were conducted. The replications (in parentheses) indicates the number of populations used in the experiments—i.e. how many times the experiment was replicated. Various types of selection have been imposed on experimental populations and are indicated by the selection type column. Negative or positive results of each experiment are provided by the reproductive isolation column. Pre-zygotic reproductive isolation means that the reproducing individuals in the populations were unable to produce offspring (effectively a positive result). Post-zygotic isolation means that the reproducing individuals were able to produce offspring but they were either sterile or inviable (a positive result as well). Negative results are indicated by "none"—that is, the experiments did not result in reproductive isolation.

Laboratory experiments of speciation [1] [6] [7] [2] [8]
Species TraitGenerations (replications) [duration]Tested Selection typeStudied genetic drift Reproductive isolation ReferenceYear
Drosophila melanogaster Escape response 18 Vicariant, reinforcement, parapatric/

sympatric

Indirect; divergentYesPre-zygoticGrant & Mettler [9] 1969
D. melanogaster Locomotion 112VicariantIndirect; divergentNoPre-zygoticBurnet & Connolly [10] 1974
D. melanogasterTemperature, humidity 70–130VicariantIndirect; divergentYesPre-zygoticKilias et al. [11] 1980
D. melanogaster DDT adaptation600 [25 years, +15 years]VicariantDirectNoPre-zygoticBoake et al. [12] 2003
D. melanogaster17, 9, 9, 1, 1, 7, 7, 7, 7Vicariant; parapatric/

sympatric

Direct, divergentPre-zygotic in vicariance; none with gene flowBarker & Karlsson [13] 1974
D. melanogaster40; 50ReinforcementDirect; divergentPre-zygoticCrossley [14] 1974
D. melanogasterLocomotion45VicariantDirect; divergentNoNonevan Dijken & Scharloo [15] [16] 1979
D. melanogasterReinforcementDirect; divergentPre-zygoticWallace [17] 1953
D. melanogaster36; 31ReinforcementDirect; divergentPre-zygoticKnight [18] 1956
D. melanogaster EDTA adaptation25, 25, 25, 14Semi-allopatric, reinforcementIndirect; divergentNoPost-zygoticRobertson [19] [20] 1966
D. melanogaster25 (8)Vicariant; reinforcement; parapatric; sympatricDirectNoneHostert [21] 1997
D. melanogasterAbdominal chaeta

number

21–31VicariantDirectYesNoneSantibanez & Waddington [22] 1958
D. melanogaster Sternopleural chaeta number32Vicariant, reinforcement, parapatric/

sympatric

DirectNoNoneBarker & Cummins [23] 1969
D. melanogaster Phototaxis, geotaxis 20VicariantNoNoneMarkow [24] [25] 1975; 1981
D. melanogasterPeripatricYesRundle et al. [26] 1998
D. melanogasterVicariant; peripatricYesMooers et al. [27] 1999
D. melanogaster12ReinforcementDivergentPre-zygoticThoday & Gibson [28] 1962
D. melanogasterNoneThoday & Gibson [29] [30] 1970; 1971
D. melanogaster16ReinforcementIndirectNoneSpiess & Wilke [31] 1954
D. melanogasterReinforcementDirect; divergentPre-zygoticEhrman [32] [33] [34] [35] 1971; 1973; 1979; 1983
D. melanogasterSternopleural chaeta number5; 27; 27; 1; 1; 1; 1; 1Parapatric/

sympatric

NoneChabora [36] 1968
D. melanogasterNoneScharloo [37] 1967
D. melanogaster1, 1Coyne & Grant [38] 1972
D. melanogaster25Rice [39] 1985
D. melanogaster25DisruptivePre-zygoticRice & Salt [40] 1988
D. melanogaster35; 35SympatricPre-zygoticRice & Salt [41] 1990
D. melanogaster NaCl and CuSO4 levels in food[3 years in allopatry, 1 in sympatry]Allopatric; reinforcement; sympatricPre-zygotic in allopatry, none in sympatryWallace [42] 1982
D. melanogasterReinforcementEhrman et al. [43] 1991
D. melanogasterReinforcementFukatami & Moriwaki [44] 1970
Drosophila simulans Scutellar bristles, development speed, wing width; desiccation resistance, fecundity, ethanol resistance; courtship display, re-mating speed, lek behavior; pupation height, clumped egg laying, general activity[3 years]Vicariant; peripatricYesPost-zygoticRingo et al. [5] 1985
Drosophila paulistorum 131; 131ReinforcementDirectPre-zygoticDobzhansky et al. [45] 1976
D. paulistorum[5 years]VicariantDobzhansky and Pavlovsky [46] 1966
Drosophila willistoni pH adaptation34–122VicariantIndirect; divergentNoPre-zygoticKalisz & Cordeiro [47] 1980
Drosophila pseudoobscura Carbohydrate source12VicariantIndirectYesPre-zygoticDodd [48] 1989
D. pseudoobscuraTemperature adaptation25–60VicariantDirectEhrman [49] [50] [51] [52] [53] 1964;

1969

D. pseudoobscuraPhototaxis, geotaxis5–11VicariantIndirectNoPre-zygoticdel Solar [54] 1966
D. pseudoobscuraVicariant; peripatricPre-zygoticPowell [55] [56] 1978; 1985
D. pseudoobscuraPeripatric; vicariantYesGaliana et al. [57] 1993
D. pseudoobscuraTemperature photoperiod; food37 (78) [33–34 months]VicariantDivergentYesNoneRundle [58] 2003
D. pseudoobscura &

Drosophila persimilis

22; 16; 9ReinforcementDirect; divergentPre-zygoticKoopman [59] 1950
D. pseudoobscura &

D. persimilis

18 (4)DirectPre-zygoticKessler [60] 1966
Drosophila mojavensis 12DirectPre-zygoticKoepfer [61] 1987
D. mojavensisDevelopment time13DivergentYesNoneEtges [62] 1998
Drosophila adiastola PeripatricYesPre-zygoticArita & Kaneshiro [63] 1974
Drosophila silvestris PeripatricYesAhearn [64] 1980
Musca domestica Geotaxis38VicariantIndirectNoPre-zygoticSoans et al. [65] 1974
M. domesticaGeotaxis16VicariantDirect; divergentNoPre-zygoticHurd & Eisenburg [66] 1975
M. domesticaPeripatricYesMeffert & Bryant [67] 1991
M. domesticaRegan et al. [68] 2003
Bactrocera cucurbitae Development time40–51DivergentYesPre-zygoticMiyatake & Shimizu [69] 1999
Zea mays 6; 6ReinforcementDirect; divergentPre-zygoticPaterniani [70] 1969
Drosophila grimshawi PeripatricJones, Widemo, & Arrendal [71] N/A
Saccharomyces cerevisiae Leu & Murry [72] 2006
D. melanogasterReinforcementHarper & Lambert [73] 1983
Tribolium castaneum Pupa l weight15 (6)DisruptiveHalliburton & Gall [74] 1983
D. melanogasterGeotaxisDivergentLofdahl et al. [75] 1992
D. pseudoobscura[10 years]Moya et al. [76] 1995
Neurospora DivergentDettman et al. [77] 2008
S. cerevisiae500DivergentDettman et al. [78] 2007
Sepsis cynipsea 35Martin & Hosken [79] 2003
D. melanogasterWigby & Chapman [80] 2006
D. pseudoobscuraSexual conflict48–52 (4; 4; 4)Bacigalupe et al. [81] 2007
D. serrataRundle et al. [82] 2005
Drosophila serrata & D. birchiiMate recognition9 (3; 3)ReinforcementNaturalPre-zygoticHiggie et al. [83] 2000
Enterobacteria phage λ Escherichia coli receptor exploitation35 cycles (6)Vicariant, sympatricPre-zygoticMeyer et al. [84] 2016
Tetranychus urticae Resistance to host plant toxinOvermeer [85] 1966
T. urticaeResistance to host plant toxinFry [86] 1999
Helianthus annus × H. petiolaris and H. anomalusHybridRieseburg et al. [87] 1996
S. cerevisiaeGreig et al. [88] 2002
D. melanogaster Life history Ghosh & Joshi [89] 2012
Drosophila subobscura Mate behaviorBárbaro et al. [90] 2015
Digital organisms~42,000; ~850 (20)EcologicalPost-zygoticAnderson & Harmon [91] 2014
Schizosaccharomyces pombe Complete reproductive isolationSeike et al. [92] 2015
D. pseudoobscuraCourtship song130Debelle et al. [93] 2014
Callosobruchus maculatus 40 (16)Debelle et al. [94] 2010

See also

Related Research Articles

<i>Drosophila</i> Genus of flies

Drosophila is a genus of fly, belonging to the family Drosophilidae, whose members are often called "small fruit flies" or pomace flies, vinegar flies, or wine flies, a reference to the characteristic of many species to linger around overripe or rotting fruit. They should not be confused with the Tephritidae, a related family, which are also called fruit flies ; tephritids feed primarily on unripe or ripe fruit, with many species being regarded as destructive agricultural pests, especially the Mediterranean fruit fly.

Microevolution is the change in allele frequencies that occurs over time within a population. This change is due to four different processes: mutation, selection, gene flow and genetic drift. This change happens over a relatively short amount of time compared to the changes termed macroevolution.

Speciation is the evolutionary process by which populations evolve to become distinct species. The biologist Orator F. Cook coined the term in 1906 for cladogenesis, the splitting of lineages, as opposed to anagenesis, phyletic evolution within lineages. Charles Darwin was the first to describe the role of natural selection in speciation in his 1859 book On the Origin of Species. He also identified sexual selection as a likely mechanism, but found it problematic.

<span class="mw-page-title-main">Theodosius Dobzhansky</span> Russian-American geneticist and evolutionary biologist (1900–1975)

Theodosius Grigorievich Dobzhansky was an American geneticist and evolutionary biologist. He was a central figure in the field of evolutionary biology for his work in shaping the modern synthesis and also popular for his support and promotion of theistic evolution as a practicing Christian. Born in the Russian Empire, Dobzhansky immigrated to the United States in 1927, aged 27.

Allopatric speciation – also referred to as geographic speciation, vicariant speciation, or its earlier name the dumbbell model – is a mode of speciation that occurs when biological populations become geographically isolated from each other to an extent that prevents or interferes with gene flow.

<span class="mw-page-title-main">Haldane's rule</span> Observation in evolutionary biology

Haldane's rule is an observation about the early stage of speciation, formulated in 1922 by the British evolutionary biologist J. B. S. Haldane, that states that if — in a species hybrid — only one sex is inviable or sterile, that sex is more likely to be the heterogametic sex. The heterogametic sex is the one with two different sex chromosomes; in therian mammals, for example, this is the male.

<span class="mw-page-title-main">Peripatric speciation</span> Speciation in which a new species is formed from an isolated smaller peripheral population

Peripatric speciation is a mode of speciation in which a new species is formed from an isolated peripheral population. Since peripatric speciation resembles allopatric speciation, in that populations are isolated and prevented from exchanging genes, it can often be difficult to distinguish between them., and peripatric speciation may be considered one type or model of allopatric speciation. The primary distinguishing characteristic of peripatric speciation is that one of the populations is much smaller than the other, as opposed to allopatric speciation, in which similarly-sized populations become separated. The terms peripatric and peripatry are often used in biogeography, referring to organisms whose ranges are closely adjacent but do not overlap, being separated where these organisms do not occur—for example on an oceanic island compared to the mainland. Such organisms are usually closely related ; their distribution being the result of peripatric speciation.

<i>Genetics and the Origin of Species</i> 1937 book by Theodosius Dobzhansky

Genetics and the Origin of Species is a 1937 book by the Ukrainian-American evolutionary biologist Theodosius Dobzhansky. It is regarded as one of the most important works of modern synthesis and was one of the earliest. The book popularized the work of population genetics to other biologists and influenced their appreciation for the genetic basis of evolution. In his book, Dobzhansky applied the theoretical work of Sewall Wright (1889–1988) to the study of natural populations, allowing him to address evolutionary problems in a novel way during his time. Dobzhansky implements theories of mutation, natural selection, and speciation throughout his book to explain the habits of populations and the resulting effects on their genetic behavior. The book explains evolution in depth as a process over time that accounts for the diversity of all life on Earth. The study of evolution was present, but greatly neglected at the time. Dobzhansky illustrates that evolution regarding the origin and nature of species during this time in history was deemed mysterious, but had expanding potential for progress to be made in its field.

<span class="mw-page-title-main">Disruptive selection</span> Natural selection for extreme trait values over intermediate ones

In evolutionary biology, disruptive selection, also called diversifying selection, describes changes in population genetics in which extreme values for a trait are favored over intermediate values. In this case, the variance of the trait increases and the population is divided into two distinct groups. In this more individuals acquire peripheral character value at both ends of the distribution curve.

<span class="mw-page-title-main">Parapatric speciation</span> Speciation within a population where subpopulations are reproductively isolated

In parapatric speciation, two subpopulations of a species evolve reproductive isolation from one another while continuing to exchange genes. This mode of speciation has three distinguishing characteristics: 1) mating occurs non-randomly, 2) gene flow occurs unequally, and 3) populations exist in either continuous or discontinuous geographic ranges. This distribution pattern may be the result of unequal dispersal, incomplete geographical barriers, or divergent expressions of behavior, among other things. Parapatric speciation predicts that hybrid zones will often exist at the junction between the two populations.

The mechanisms of reproductive isolation are a collection of evolutionary mechanisms, behaviors and physiological processes critical for speciation. They prevent members of different species from producing offspring, or ensure that any offspring are sterile. These barriers maintain the integrity of a species by reducing gene flow between related species.

<i>Drosophila pseudoobscura</i> Species of fly

Drosophila pseudoobscura is a species of fruit fly, used extensively in lab studies of speciation. It is native to western North America.

<span class="mw-page-title-main">Ecological speciation</span>

Ecological speciation is a form of speciation arising from reproductive isolation that occurs due to an ecological factor that reduces or eliminates gene flow between two populations of a species. Ecological factors can include changes in the environmental conditions in which a species experiences, such as behavioral changes involving predation, predator avoidance, pollinator attraction, and foraging; as well as changes in mate choice due to sexual selection or communication systems. Ecologically-driven reproductive isolation under divergent natural selection leads to the formation of new species. This has been documented in many cases in nature and has been a major focus of research on speciation for the past few decades.

<span class="mw-page-title-main">Reinforcement (speciation)</span> Process of increasing reproductive isolation

Reinforcement is a process of speciation where natural selection increases the reproductive isolation between two populations of species. This occurs as a result of selection acting against the production of hybrid individuals of low fitness. The idea was originally developed by Alfred Russel Wallace and is sometimes referred to as the Wallace effect. The modern concept of reinforcement originates from Theodosius Dobzhansky. He envisioned a species separated allopatrically, where during secondary contact the two populations mate, producing hybrids with lower fitness. Natural selection results from the hybrid's inability to produce viable offspring; thus members of one species who do not mate with members of the other have greater reproductive success. This favors the evolution of greater prezygotic isolation. Reinforcement is one of the few cases in which selection can favor an increase in prezygotic isolation, influencing the process of speciation directly. This aspect has been particularly appealing among evolutionary biologists.

<span class="mw-page-title-main">History of speciation</span>

The scientific study of speciation — how species evolve to become new species — began around the time of Charles Darwin in the middle of the 19th century. Many naturalists at the time recognized the relationship between biogeography and the evolution of species. The 20th century saw the growth of the field of speciation, with major contributors such as Ernst Mayr researching and documenting species' geographic patterns and relationships. The field grew in prominence with the modern evolutionary synthesis in the early part of that century. Since then, research on speciation has expanded immensely.

<span class="mw-page-title-main">Evidence for speciation by reinforcement</span> Overview article

Reinforcement is a process within speciation where natural selection increases the reproductive isolation between two populations of species by reducing the production of hybrids. Evidence for speciation by reinforcement has been gathered since the 1990s, and along with data from comparative studies and laboratory experiments, has overcome many of the objections to the theory. Differences in behavior or biology that inhibit formation of hybrid zygotes are termed prezygotic isolation. Reinforcement can be shown to be occurring by measuring the strength of prezygotic isolation in a sympatric population in comparison to an allopatric population of the same species. Comparative studies of this allow for determining large-scale patterns in nature across various taxa. Mating patterns in hybrid zones can also be used to detect reinforcement. Reproductive character displacement is seen as a result of reinforcement, so many of the cases in nature express this pattern in sympatry. Reinforcement's prevalence is unknown, but the patterns of reproductive character displacement are found across numerous taxa, and is considered to be a common occurrence in nature. Studies of reinforcement in nature often prove difficult, as alternative explanations for the detected patterns can be asserted. Nevertheless, empirical evidence exists for reinforcement occurring across various taxa and its role in precipitating speciation is conclusive.

<i>Drosophila quinaria</i> species group Species group of the subgenus Drosophila

The Drosophila quinaria species group is a speciose lineage of mushroom-feeding flies studied for their specialist ecology, their parasites, population genetics, and the evolution of immune systems. Quinaria species are part of the Drosophila subgenus.

Maria R. Servedio is a Canadian-American professor at the University of North Carolina at Chapel Hill. Her research spans a wide range of topics in evolutionary biology from sexual selection to evolution of behavior. She largely approaches these topics using mathematical models. Her current research interests include speciation and reinforcement, mate choice, and learning with a particular focus on evolutionary mechanisms that promote premating (prezygotic) isolation. Through integrative approaches and collaborations, she uses mathematical models along with experimental, genetic, and comparative techniques to draw conclusions on how evolution occurs. She has published extensively on these topics and has more than 50 peer-reviewed articles. She served as Vice President in 2018 of the American Society of Naturalists, and has been elected to serve as President in 2023.

Allochronic speciation is a form of speciation arising from reproductive isolation that occurs due to a change in breeding time that reduces or eliminates gene flow between two populations of a species. The term allochrony is used to describe the general ecological phenomenon of the differences in phenology that arise between two or more species—speciation caused by allochrony is effectively allochronic speciation.

In biology, parallel speciation is a type of speciation where there is repeated evolution of reproductively isolating traits via the same mechanisms occurring between separate yet closely related species inhabiting different environments. This leads to a circumstance where independently evolved lineages have developed reproductive isolation from their ancestral lineage, but not from other independent lineages that inhabit similar environments. In order for parallel speciation to be confirmed, there is a set of three requirements that has been established that must be met: there must be phylogenetic independence between the separate populations inhabiting similar environments to ensure that the traits responsible for reproductive isolation evolved separately, there must be reproductive isolation not only between the ancestral population and the descendent population, but also between descendent populations that inhabit dissimilar environments, and descendent populations that inhabit similar environments must not be reproductively isolated from one another. To determine if natural selection specifically is the cause of parallel speciation, a fourth requirement has been established that includes identifying and testing an adaptive mechanism, which eliminates the possibility of a genetic factor such as polyploidy being the responsible agent.

References

  1. 1 2 3 Coyne, Jerry A.; Orr, H. Allen (2004), Speciation, Sinauer Associates, pp. 1–545, ISBN   978-0-87893-091-3
  2. 1 2 3 Florin, Ann-Britt & Ödeen, Anders (2002), "Laboratory environments are not conducive for allopatric speciation", Journal of Evolutionary Biology, 15 (1): 10–19, doi: 10.1046/j.1420-9101.2002.00356.x {{citation}}: CS1 maint: multiple names: authors list (link)
  3. Coyne, Jerry A.; Orr, H. Allen (1997), ""Patterns of Speciation in Drosophila" Revisited", Evolution, 51 (1): 295–303, doi: 10.1111/j.1558-5646.1997.tb02412.x , PMID   28568795
  4. Momigliano, Paolo; Jokinen, Henri; Fraimout, Antoine; Florin, Ann-Britt; Norkko, Alf; Merilä, Juha (2017), "Extraordinarily rapid speciation in a marine fish" (PDF), PNAS, 114 (23): 6074–6079, Bibcode:2017PNAS..114.6074M, doi: 10.1073/pnas.1615109114 , PMC   5468626 , PMID   28533412
  5. 1 2 Ringo, John; Wood, David; Rockwell, Robert; Dowse, Harold (1985), "An Experiment Testing Two Hypotheses of Speciation", The American Naturalist, 126 (5): 642–661, doi:10.1086/284445, S2CID   84819968
  6. 1 2 Rice, William R. & Hostert, Ellen E. (1993), "Laboratory Experiments on Speciation: What Have We Learned in 40 Years?", Evolution, 47 (6): 1637–1653, doi:10.1111/j.1558-5646.1993.tb01257.x, PMID   28568007, S2CID   42100751 {{citation}}: CS1 maint: multiple names: authors list (link)
  7. 1 2 Kirkpatrick, Mark & Ravigné, Virginie (2002), "Speciation by Natural and Sexual Selection: Models and Experiments", The American Naturalist, 159: S22–S35, doi:10.1086/338370, PMID   18707367, S2CID   16516804 {{citation}}: CS1 maint: multiple names: authors list (link)
  8. 1 2 Fry, James D. (2009). Laboratory Experiments on Speciation. In Garland, Theodore & Rose, Michael R. "Experimental Evolution: Concepts, Methods, and Applications of Selection Experiments". Pp. 631–656. doi : 10.1525/california/9780520247666.003.0020
  9. Grant, B. S. & Mettler, L. E. (1969), "Disruptive and stabilizing selection on the" escape" behavior of Drosophila melanogaster", Genetics, 62 (3): 625–637, doi:10.1093/genetics/62.3.625, PMC   1212303 , PMID   17248452 {{citation}}: CS1 maint: multiple names: authors list (link)
  10. Burnet, B. & Connolly, K. (1974). Activity and sexual behavior in Drosophila melanogaster. In Abeelen, J. H. V. F. (eds). The Genetics of Behaviour. North-Holland, Amsterdam. Pp. 201–258.
  11. Kilias, G., Alahiotis, S. N., & Pelecanos, M. (1980), "A Multifactorial Genetic Investigation of Speciation Theory Using Drosophila melanogaster", Evolution, 34 (4): 730–737, doi:10.2307/2408027, JSTOR   2408027, PMID   28563991 {{citation}}: CS1 maint: multiple names: authors list (link)
  12. Boake, C. R. B., Mcdonald, K., Maitra, S., Ganguly, R. (2003), "Forty years of solitude: life-history divergence and behavioural isolation between laboratory lines of Drosophila melanogaster", Journal of Evolutionary Biology, 16 (1): 83–90, doi: 10.1046/j.1420-9101.2003.00505.x , PMID   14635883 {{citation}}: CS1 maint: multiple names: authors list (link)
  13. Barker, J. S. F. & Karlsson, L. J. E. (1974), "Effects of population size and selection intensity on responses to disruptive selection in Drosophila melanogaster", Genetics, 78 (2): 715–735, doi:10.2307/2407287, JSTOR   2407287, PMC   1213230 , PMID   4217303 {{citation}}: CS1 maint: multiple names: authors list (link)
  14. Crossley, Stella A. (1974), "Changes in Mating Behavior Produced by Selection for Ethological Isolation Between Ebony and Vestigial Mutants of Drosophila melanogaster", Evolution, 28 (4): 631–647, doi:10.1111/j.1558-5646.1974.tb00795.x, PMID   28564833, S2CID   35867118
  15. van Dijken, F. R. & Scharloo, W. (1979), "Divergent selection on locomotor activity in Drosophila melanogaster. I. Selection response", Behavior Genetics, 9 (6): 543–553, doi:10.1007/BF01067350, PMID   122270, S2CID   39352792 {{citation}}: CS1 maint: multiple names: authors list (link)
  16. van Dijken, F. R. & Scharloo, W. (1979), "Divergent selection on locomotor activity in Drosophila melanogaster. II. Test for reproductive isolation between selected lines", Behavior Genetics, 9 (6): 555–561, doi:10.1007/BF01067351, PMID   122271, S2CID   40169222 {{citation}}: CS1 maint: multiple names: authors list (link)
  17. Wallace, B. (1953), "Genetic divergence of isolated populations of Drosophila melanogaster", Proceedings of the Ninth International Congress of Genetics, 9: 761–764
  18. Knight, G. R., Robertson, Alan, & Waddington, C. H. (1956), "Selection for sexual isolation within a species", Evolution, 10 (1): 14–22, doi: 10.1111/j.1558-5646.1956.tb02825.x {{citation}}: CS1 maint: multiple names: authors list (link)
  19. Robertson, Forbes W. (1966), "A test of sexual isolation in Drosophila", Genetical Research, 8 (2): 181–187, doi: 10.1017/S001667230001003X , PMID   5922518
  20. Robertson, Forbes W. (1966), "The ecological genetics of growth in Drosophila 8. Adaptation to a New Diet", Genetical Research, 8 (2): 165–179, doi: 10.1017/S0016672300010028 , PMID   5922517
  21. Hostert, Ellen E. (1997), "Reinforcement: a new perspective on an old controversy", Evolution, 51 (3): 697–702, doi: 10.1111/j.1558-5646.1997.tb03653.x , PMID   28568598
  22. Koref Santibañez, S. & Waddington, C. H. (1958), "The origin of sexual isolation between different lines within a species", Evolution, 12 (4): 485–493, doi:10.2307/2405959, JSTOR   2405959 {{citation}}: CS1 maint: multiple names: authors list (link)
  23. Barker, J. S. F. & Cummins, L. J. (1969), "The effect of selection for sternopleural bristle number in mating behaviour in Drosophila melanogaster", Genetics, 61 (3): 713–719, doi:10.1093/genetics/61.3.713, PMC   1212235 , PMID   17248436 {{citation}}: CS1 maint: multiple names: authors list (link)
  24. Markow, Therese Ann (1975), "A genetic analysis of phototactic behavior in Drosophila melanogaster", Genetics, 79 (3): 527–534, doi:10.1093/genetics/79.3.527, PMC   1213291 , PMID   805084
  25. Markow, Therese Ann (1981), "Mating preferences are not predictive of the direction of evolution in experimental populations of Drosophila", Science, 213 (4514): 1405–1407, Bibcode:1981Sci...213.1405M, doi:10.1126/science.213.4514.1405, PMID   17732575, S2CID   15497733
  26. Rundle, H. D., Mooers, Arne Ø. & Whitlock, Michael C. (1998), "Single founder-flush events and the evolution of reproductive isolation", Evolution, 52 (6): 1850–1855, doi:10.1111/j.1558-5646.1998.tb02263.x, PMID   28565304, S2CID   24502821 {{citation}}: CS1 maint: multiple names: authors list (link)
  27. Mooers, Arne Ø., Rundle, Howard D. & Whitlock, Michael C. (1999), "The effects of selection and bottlenecks on male mating success in peripheral isolates", American Naturalist, 153 (4): 437–444, doi:10.1086/303186, PMID   29586617, S2CID   4411105 {{citation}}: CS1 maint: multiple names: authors list (link)
  28. Thoday, J. M. & Gibson, J. B. (1962), "Isolation by disruptive selection", Nature, 193 (4821): 1164–1166, Bibcode:1962Natur.193.1164T, doi:10.1038/1931164a0, PMID   13920720, S2CID   5156234 {{citation}}: CS1 maint: multiple names: authors list (link)
  29. Thoday, J. M. & Gibson, J. B. (1970), "The probability of isolation by disruptive selection", Nature, 104 (937): 219–230, doi:10.1086/282656, S2CID   85333360 {{citation}}: CS1 maint: multiple names: authors list (link)
  30. Scharloo, W. (1971), "Reproductive isolation by disruptive selection: Did it occur?", American Naturalist, 105 (941): 83–86, doi:10.1086/282706, S2CID   84204545
  31. Spiess, E. B. & Wilke, C. M. (1984), "Still another attempt to achieve assortive mating by disruptive selection in Drosophila", Evolution, 38 (3): 505–515, doi:10.2307/2408700, JSTOR   2408700, PMID   28555983 {{citation}}: CS1 maint: multiple names: authors list (link)
  32. Ehrman, Lee (1971), "Natural selection and the origin of reproductive isolation", American Naturalist, 105 (945): 479–483, doi:10.1086/282739, S2CID   85401244
  33. Ehrman, Lee (1973), "More on natural selection and the origin of reproductive isolation", American Naturalist, 107 (954): 318–319, doi:10.1086/282835, S2CID   83780632
  34. Ehrman, Lee (1979), "Still more on natural selection and the origin of reproductive isolation", American Naturalist, 113 (1): 148–150, doi:10.1086/283371, S2CID   85237458
  35. Ehrman, Lee (1983), "Fourth report on natural selection for the origin of reproductive isolation", American Naturalist, 121 (2): 290–293, doi:10.1086/284059, S2CID   83654887
  36. Chabora, Alice J. (1968), "Disruptive selection for sternopleural chaeta number in various strains of Drosophila melanogaster", American Naturalist, 102 (928): 525–532, doi:10.1086/282565, S2CID   84885812
  37. Scharloo, W., Hoogmoed, M. S. & Kuile, A. T. (1967), "Stabilizing and disruptive selection on a mutant character in Drosophila. I. The phenotypic variance and its components.", Genetics, 56 (4): 709–726, doi:10.1093/genetics/56.4.709, PMC   1211648 , PMID   6061662 {{citation}}: CS1 maint: multiple names: authors list (link)
  38. Coyne, Jerry A. & and Grant, Bruce (1972), "Disruptive selection on I-maze activity in Drosophila melanogaster", Genetics, 71 (1): 185–188, doi:10.1093/genetics/71.1.185, PMC   1212770 , PMID   17248572 {{citation}}: CS1 maint: multiple names: authors list (link)
  39. Rice, W. R. (1985), "Disruptive selection on habitat preference and the evolution of reproductive isolation: an exploratory experiment", Evolution, 39 (3): 645–656, doi: 10.1111/j.1558-5646.1985.tb00401.x , PMID   28561974
  40. Rice, William R. & Salt, George, W. (1988), "Speciation via disruptive selection on habitat preference", American Naturalist, 131 (6): 911–917, doi:10.1086/284831, S2CID   84876223 {{citation}}: CS1 maint: multiple names: authors list (link)
  41. Rice, William R. & Salt, George, W. (1990), "The evolution of reproductive isolation as a correlated character under sympatric conditions: experimental evidence", Evolution, 44 (5): 1140–1152, doi:10.2307/2409278, JSTOR   2409278, PMID   28563894 {{citation}}: CS1 maint: multiple names: authors list (link)
  42. Wallace, B. (1982), "Drosophila melanogaster populations selected for resistances to NaCl and CuSO4 in both allopatry and sympatry", Journal of Heredity, 73 (1): 35–42, doi:10.1093/oxfordjournals.jhered.a109572, PMID   6802898
  43. Ehrman, Lee, White, Marney A. & Wallace, B. (1991). A long-term study involving Drosophila melanogaster and toxic media. In Hecht, M. K., Wallace, B., & Maclntyre, R. J. (eds). Evolutionary biology, vol. 25. Plenum Press, New York. Pp. 175–209
  44. Fukatami, A & Moriwaki, D. (1970), "Selection for sexual isolation in Drosophila melanogaster by a modification of Koopman's method", The Japanese Journal of Genetics, 45 (3): 193–204, doi: 10.1266/jjg.45.193 {{citation}}: CS1 maint: multiple names: authors list (link)
  45. Dobzhansky, Theodosius; Pavlovsky, O.; Powell, J. R. (1976), "Partially Successful Attempt to Enhance Reproductive Isolation Between Semispecies of Drosophila paulistorum", Evolution, 30 (2): 201–212, doi:10.2307/2407696, JSTOR   2407696, PMID   28563045
  46. Dobzhansky, Theodosius & Pavlovsky, O. (1966), "Spontaneous origin of an incipient species in the Drosophila paulistorum complex", Proceedings of the National Academy of Sciences, 55 (4): 723–733, Bibcode:1966PNAS...55..727D, doi: 10.1073/pnas.55.4.727 , PMC   224220 , PMID   5219677 {{citation}}: CS1 maint: multiple names: authors list (link)
  47. de Oliveira, Alice Kalisz & Cordeiro, Antonio Rodrigues (1980), "Adaptation of Drosophila willistoni experimental populations to extreme pH medium", Heredity, 44: 123–130, doi: 10.1038/hdy.1980.11 {{citation}}: CS1 maint: multiple names: authors list (link)
  48. Dodd, Diane M. B. (1989), "Reproductive Isolation as a Consequence of Adaptive Divergence in Drosophila pseudoobscura", Evolution, 43 (6): 1308–1311, doi:10.2307/2409365, JSTOR   2409365, PMID   28564510
  49. Ehrman, Lee (1964), "Genetic divergence in M. Vetukhiv's experimental populations of Drosophila pseudoobscura 1. Rudiments of sexual isolation", Genetical Research, 5: 150–157, doi: 10.1017/S0016672300001099
  50. Mouradael, K. (1965), "Genetic divergence in M. Vetukhiv's experimental populations of Drosophila pseudoobscura 2. Longevity", Genetical Research, 6: 139–146, doi: 10.1017/S0016672300004006 , PMID   14297592
  51. Anderson, Wyatt, W. (1966), "Genetic divergence in M. Vetukhiv's experimental populations of Drosophila pseudoobscura 3. Divergence in Body Size", Genetical Research, 7 (2): 255–266, doi: 10.1017/S0016672300009666 {{citation}}: CS1 maint: multiple names: authors list (link)
  52. Kitagawa, Osamu (1967), "Genetic divergence in M. Vetukhiv's experimental populations of Drosophila pseudoobscura: IV. Relative viability", Genetical Research, 10 (7): 303–312, doi: 10.1017/S001667230001106X
  53. Ehrman, Lee (1969), "Genetic divergence in M. Vetukhiv's experimental populations of Drosophila pseudoobscura. 5. A further study of rudiments of sexual isolation", American Midland Naturalist, 82 (1): 272–276, doi:10.2307/2423835, JSTOR   2423835
  54. del Solar, Eduardo (1966), "Sexual isolation caused by selection for positive and negative phototaxis and geotaxis in Drosophila pseudoobscura", Proceedings of the National Academy of Sciences, 56 (2): 484–487, doi: 10.1073/pnas.56.2.484 , PMC   224398 , PMID   5229969
  55. Powell, Jeffrey R. (1978), "The Founder-Flush Speciation Theory: An Experimental Approach", Evolution, 32 (3): 465–474, doi:10.2307/2407714, JSTOR   2407714, PMID   28567948
  56. Dodd, Diane M. B. & Powell, Jeffrey R. (1985), "Founder-Flush Speciation: An Update of Experimental Results with Drosophila", Evolution, 39 (6): 1388–1392, doi: 10.1111/j.1558-5646.1985.tb05704.x , PMID   28564258 {{citation}}: CS1 maint: multiple names: authors list (link)
  57. Galiana, Augustí, Moya, Andres & Ayala, Francisco J. (1993), "Founder-flush speciation in Drosophila pseudoobscura: a large scale experiment", Evolution, 47 (2): 432–444, doi: 10.1111/j.1558-5646.1993.tb02104.x , PMID   28568735 {{citation}}: CS1 maint: multiple names: authors list (link)
  58. Rundle, Howard D. (2003), "Divergent environments and population bottlenecks fail to generate premating isolation in Drosophila pseudoobscura", Evolution, 57 (11): 2557–2565, doi: 10.1111/j.0014-3820.2003.tb01499.x , PMID   14686531
  59. Koopman, Karl F. (1950), "Natural Selection for Reproductive Isolation Between Drosophila pseudoobscura and Drosophila persimilis", Evolution, 4 (2): 135–148, doi:10.2307/2405390, JSTOR   2405390
  60. Kessler, Seymour (1966), "Selection For and Against Ethological Isolation Between Drosophila pseudoobscura and Drosophila persimilis", Evolution, 20 (4): 634–645, doi:10.2307/2406597, JSTOR   2406597, PMID   28562900
  61. Koepfer, H. Roberta (1987), "Selection for Sexual Isolation Between Geographic Forms of Drosophila mojavensis. I Interactions Between the Selected Forms", Evolution, 41 (1): 37–48, doi:10.2307/2408971, JSTOR   2408971, PMID   28563762
  62. Etges, W. J. (1998), "Premating isolation is determined by larval rearing substrates in cactophilis Drosophila mojavensis. IV. Correlated responses in behavioral isolation to artificial selection on a life-history trait", American Naturalist, 152 (1): 129–144, doi:10.1086/286154, PMID   18811406, S2CID   17689372
  63. Arita, Lorna H. & Kaneshiro, Kenneth Y. (1979), "Ethological Isolation Between Two Stocks of Drosophila Adiastola Hardy", Hawaiian Entomological Society, 23 (1): 31–34{{citation}}: CS1 maint: multiple names: authors list (link)
  64. Ahearn, J. N. (1980), "Evolution of behavioral reproductive isolation in a laboratory stock of Drosophila silvestris", Experientia, 36 (1): 63–64, doi:10.1007/BF02003975, S2CID   43809774
  65. Soans, A. Benedict; Pimentel, David; Soans, Joyce S. (1974), "Evolution of Reproductive Isolation in Allopatric and Sympatric Populations", The American Naturalist, 108 (959): 117–124, doi:10.1086/282889, S2CID   84913547
  66. Hurd, L. E. & Eisenberg, Robert M. (1975), "Divergent Selection for Geotactic Response and Evolution of Reproductive Isolation in Sympatric and Allopatric Populations of Houseflies", The American Naturalist, 109 (967): 353–358, doi:10.1086/283002, S2CID   85084378 {{citation}}: CS1 maint: multiple names: authors list (link)
  67. Meffert, L. M. & Bryant, E. H. (1991), "Mating propensity and courtship behavior in serially bottlenecked lines of the housefly", Evolution, 45 (2): 293–306, doi:10.1111/j.1558-5646.1991.tb04404.x, PMID   28567864, S2CID   13379387 {{citation}}: CS1 maint: multiple names: authors list (link)
  68. Regan, J. L.; Meffert, L. M.; Bryant, E. H. (2003), "A direct experimental test of founder-flush effects on the evolutionary potential for assortative mating", Journal of Evolutionary Biology, 16 (2): 302–312, doi: 10.1046/j.1420-9101.2003.00521.x , PMID   14635869
  69. Miyatake, Takahisa & Shimizu, Toru (1999), "Genetic correlations between life-history and behavioral traits can cause reproductive isolation", Evolution, 53 (1): 201–208, doi:10.2307/2640932, JSTOR   2640932, PMID   28565193 {{citation}}: CS1 maint: multiple names: authors list (link)
  70. Paterniani, E. (1969), "Selection for Reproductive Isolation between Two Populations of Maize, Zea mays L.", Evolution, 23 (4): 534–547, doi:10.2307/2406851, JSTOR   2406851, PMID   28562870
  71. Ödeen, Anders & Florin, Ann-Britt (2002), "Sexual selection and peripatric speciation: the Kaneshiro model revisited", Journal of Evolutionary Biology, 15 (2): 301–306, doi: 10.1046/j.1420-9101.2002.00378.x {{citation}}: CS1 maint: multiple names: authors list (link)
  72. Leu, J. Y. & Murray, A. W. (2006), "Experimental evolution of mating discrimination in budding yeast", Current Biology, 16 (3): 280–286, doi: 10.1016/j.cub.2005.12.028 , PMID   16461281 {{citation}}: CS1 maint: multiple names: authors list (link)
  73. Harper, A. A. & Lambert, D. M. (1983), "The population genetics of reinforcing selection", Genetica, 62 (1): 15–23, doi:10.1007/BF00123305, S2CID   7947934 {{citation}}: CS1 maint: multiple names: authors list (link)
  74. Halliburton, Richard & Gall, G. A. E. (1981), "Disruptive selection and assortative mating in Tribolium castaneum", Evolution, 35 (5): 829–843, doi: 10.1111/j.1558-5646.1981.tb04947.x , PMID   28581046 {{citation}}: CS1 maint: multiple names: authors list (link)
  75. Lofdahl, L. Katharine; Hu, Dan; Ehrman, Lee; Hirsch, Jerry; Skoog, Linda (1992), "Incipient reproductive isolation and evolution in laboratory Drosophila melanogaster selected for geotaxis", Animal Behaviour, 44 (4): 783–786, doi:10.1016/S0003-3472(05)80307-0, S2CID   53257556
  76. Moya, A.; Galiana, A.; Ayala, F. J. (1995), "Founder-effect speciation theory: failure of experimental corroboration", Proceedings of the National Academy of Sciences, 92 (9): 3983–3986, Bibcode:1995PNAS...92.3983M, doi: 10.1073/pnas.92.9.3983 , PMC   42086 , PMID   7732017
  77. Dettman, Jeremy R.; Anderson, James B.; Kohn, Linda M. (2008), "Divergent adaptation promotes reproductive isolation among experimental populations of the filamentous fungus Neurospora", BMC Evolutionary Biology, 8 (35): 35, Bibcode:2008BMCEE...8...35D, doi: 10.1186/1471-2148-8-35 , PMC   2270261 , PMID   18237415
  78. Dettman, Jeremy R.; Sirjusingh, Caroline; Kohn, Linda M.; Anderson, James B. (2007), "Incipient speciation by divergent adaptation and antagonistic epistasis in yeast", Nature, 447 (7144): 585–588, Bibcode:2007Natur.447..585D, doi:10.1038/nature05856, PMID   17538619, S2CID   4382609
  79. Martin, Oliver Y. & Hosken, David J. (2003), "The evolution of reproductive isolation through sexual conflict", Nature, 423 (6943): 979–982, Bibcode:2003Natur.423..979M, doi:10.1038/nature01752, PMID   12827200, S2CID   4379725 {{citation}}: CS1 maint: multiple names: authors list (link)
  80. Wigby, S. & Chapman, T. (2006), "No evidence that experimental manipulation of sexual conflict drives premating reproductive isolation in Drosophila melanogaster", Journal of Evolutionary Biology, 19 (4): 1033–1039, doi: 10.1111/j.1420-9101.2006.01107.x , PMID   16780504 {{citation}}: CS1 maint: multiple names: authors list (link)
  81. Bacigalupe, L. D.; Crudgington, H. S.; Hunter, F.; Moore, A. J.; Snook, R. R. (2007), "Sexual conflict does not drive reproductive isolation in experimental populations of Drosophila pseudoobscura", Journal of Evolutionary Biology, 20 (5): 1763–1771, doi: 10.1111/j.1420-9101.2007.01389.x , PMID   17714294
  82. Rundle, Howard D.; Chenoweth, Steve F.; Doughty, Paul; Blows, Mark W. (2005), "Divergent selection and the evolution of signal traits and mating preferences", PLOS Biology, 3 (11): e368, doi: 10.1371/journal.pbio.0030368 , PMC   1262626 , PMID   16231971
  83. Higgie, Megan; Chenoweth, Steve F.; Blows, Mark W. (2000), "Natural selection and the reinforcement of mate recognition" (PDF), Science, 290 (5491): 519–521, Bibcode:2000Sci...290..519H, doi:10.1126/science.290.5491.519, PMID   11039933
  84. Meyer, Justin R.; Dobias, Devin T.; Medina, Sarah J.; Servilio, Lisa; Gupta, Animesh; Lenski, Richard E. (2016), "Ecological speciation of bacteriophage lambda in allopatry and sympatry", Science, 354 (6317): 1301–1304, Bibcode:2016Sci...354.1301M, doi: 10.1126/science.aai8446 , PMID   27884940
  85. Overmeer, W. P. J. (1966), "Intersterility as a Consequence of Insecticide Selections in Tetranychus urticae Koch (Acari: Tetranychidae)", Nature, 209 (321): 321, Bibcode:1966Natur.209..321O, doi: 10.1038/209321a0 , PMID   5950361, S2CID   4190896
  86. Fry, James D. (1999), "The role of adaptation to host plants in the evolution of reproductive isolation: Negative evidence from Tetranychus urticae Koch", Experimental & Applied Acarology, 23 (5): 379–387, doi:10.1023/A:1006245711950, hdl: 2027.42/41783 , S2CID   2329637
  87. Rieseberg, L. H.; Sinervo B.; Linder, C. R.; Ungerer, M.C.; Arias, D. M. (1996), "Role of Gene Interactions in Hybrid Speciation: Evidence from Ancient and Experimental Hybrids", Science, 272 (5262): 741–745, Bibcode:1996Sci...272..741R, doi:10.1126/science.272.5262.741, PMID   8662570, S2CID   39005242
  88. Greig, Duncan; Louis, Edward J.; Borts, Rhona H.; Travisano, Michael (2002), "Hybrid speciation in experimental populations of yeast", Science, 298 (5599): 1773–1775, Bibcode:2002Sci...298.1773G, doi:10.1126/science.1076374, PMID   12459586, S2CID   29972396
  89. Ghosh, Shampa M. & Joshi, Amitabh (2012), "Evolution of reproductive isolation as a by-product of divergent life-history evolution in laboratory populations of Drosophila melanogaster", Ecology and Evolution, 2 (12): 3214–3226, doi:10.1002/ece3.413, PMC   3539013 , PMID   23301185 {{citation}}: CS1 maint: multiple names: authors list (link)
  90. Bárbaro, Margarida; Mira, Mário S.; Fragata, Inês; Simões, Pedro; Lima, Margarida; Lopes-Cunha, Miguel; Kellen, Bárbara; Santos, Josiane; Varela, Susana A. M.; Matos, Margarida; Magalhães, Sara (2015), "Evolution of mating behavior between two populations adapting to common environmental conditions", Ecology and Evolution, 5 (8): 1609–1617, Bibcode:2015EcoEv...5.1609B, doi:10.1002/ece3.1454, PMC   4409410 , PMID   25937905
  91. Anderson, Carlos J. R. & Harmon, Luke (2014), "Ecological and Mutation-Order Speciation in Digital Organisms", The American Naturalist, 183 (2): 257–269, doi: 10.1086/674359 , PMID   24464199, S2CID   30400444 {{citation}}: CS1 maint: multiple names: authors list (link)
  92. Seike, Taisuke; Nakamura, Taro; Shimoda, Chikashi (2015), "Molecular coevolution of a sex pheromone and its receptor triggers reproductive isolation in Schizosaccharomyces pombe", PNAS, 112 (14): 4405–4410, Bibcode:2015PNAS..112.4405S, doi: 10.1073/pnas.1501661112 , PMC   4394278 , PMID   25831518
  93. Debelle, Allan; Ritchie, Michael G.; Snook, Rhonda R. (2014), "Evolution of divergent female mating preference in response to experimental sexual selection", Evolution, 68 (9): 2524–2533, doi:10.1111/evo.12473, PMC   4262321 , PMID   24931497
  94. Fricke, C; Andersson, C.; Arnqvist, G. (2010), "Natural selection hampers divergence of reproductive traits in a seed beetle", Journal of Evolutionary Biology, 23 (9): 1857–1867, doi:10.1111/j.1420-9101.2010.02050.x, PMID   20646133, S2CID   13815274