Brassica rapa

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Brassica rapa
Brassica rapa plant.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Brassicales
Family: Brassicaceae
Genus: Brassica
Species:
B. rapa
Binomial name
Brassica rapa
Illustration of Brassica rapa from the Japanese agricultural encyclopedia Seikei Zusetsu Leiden University Library - Seikei Zusetsu vol. 25, page 003 - Cai noHua  - Brassica rapa L., 1804.jpg
Illustration of Brassica rapa from the Japanese agricultural encyclopedia Seikei Zusetsu

Brassica rapa is a plant species growing in various widely cultivated forms including the turnip (a root vegetable); Komatsuna , napa cabbage , bomdong , bok choy , and rapini .

Contents

Brassica rapa subsp. oleifera is an oilseed which has many common names, including rape, field mustard, bird's rape, and keblock. [2] [3] [4] [5] [6] [7] The term rapeseed oil is a general term for oil from Brassica species. Food grade oil made from the seed of low-erucic acid Canadian-developed strains is also called canola oil, while non-food oil is called colza oil. [2] Canola oil is sourced from three species of Brassica plants: Brassica rapa and Brassica napus are commonly grown in Canada, while Brassica juncea (brown mustard) is a minor crop for oil production. [8]

History

Leiden University Library - Seikei Zusetsu vol. 21, page 014 - Song  - Brassica rapa L., 1804.jpg

The origin of B. rapa, both geographically and any surviving wild relatives, has been difficult to identify because it has been developed by humans into many types of vegetables, is now found in most parts of the world, and has returned to the wild many times as a feral plant. A study of genetic sequences from over 400 domesticated and feral B. rapa individuals, along with environmental modelling, has provided more information about the complex history. These indicate that the ancestral B. rapa probably originated 4000 to 6000 years ago in the Hindu Kush area of Central Asia, and had three sets of chromosomes. This provided the genetic potential for a diversity of form, flavour and growth requirements. Domestication has produced modern vegetables and oil-seed crops, all with two sets of chromosomes. [9] [10]

Oilseed subspecies (oleifera) of Brassica rapa may have been domesticated several times from the Mediterranean to India, starting as early as 2000 BC. [11] Edible turnips were possibly first cultivated in northern Europe, and were an important food in ancient Rome. [11] The turnip then spread east to China, and reached Japan by 700 AD. [11] There are descriptions of B. rapa vegetables in Indian and Chinese documents from around 1000 BC. [9]

In the 18th century, the turnip and the oilseed-producing variants were seen as being different species by Carl Linnaeus who named them B. rapa and B. campestris. Twentieth-century taxonomists found that the plants were cross fertile and thus belonged to the same species. Since the turnip had been named first by Linnaeus, the name Brassica rapa was adopted. [12]

Uses

Many butterflies, including the small white, feed from and pollinate the B. rapa flowers.

The young leaves are considered an excellent leaf vegetable and can be eaten raw; older leaves are better cooked. The taproot and seeds can also be eaten raw, although the latter contains an oil which may cause irritation for some people. [13]

Cultivars

CultivarImageName
Bok choy Baby Pak Choi (01).JPG Brassica rapa subsp. chinensis
Bomdong Bomdong cabbage.jpg Brassica rapa var. glabra
Choy sum Choi Sum stalks.JPG Brassica rapa subsp. parachinensis
Field mustard Brassica rapa ja02.jpg Brassica rapa subsp. oleifera
Komatsuna Komatsuna.jpg Brassica rapa subsp. perviridis
Mizuna Mizuna 001.jpg Brassica rapa var. nipposinica
Napa cabbage Cinske zeli.jpg Brassica rapa subsp. pekinensis
Rapini Rapini.jpg Brassica rapa var. ruvo
Tatsoi Tatsoi.jpg Brassica rapa subsp. narinosa
Turnip Turnip 2622027.jpg Brassica rapa subsp. rapa
Yellow sarson Sarsoon Ka Saag Fresh.JPG Brassica rapa subsp. trilocularis

Related Research Articles

<span class="mw-page-title-main">Turnip</span> Type of root vegetable

The turnip or white turnip is a root vegetable commonly grown in temperate climates worldwide for its white, fleshy taproot. The word turnip is a compound of turn as in turned/rounded on a lathe and neep, derived from Latin napus, the word for the plant. Small, tender varieties are grown for human consumption, while larger varieties are grown as feed for livestock. In Northern England, Scotland, Ireland, Cornwall, Devon, and parts of Canada, the word turnip often refers to rutabaga, also known as swede, a larger, yellow root vegetable in the same genus (Brassica).

<i>Brassica</i> Genus of flowering plants in the cabbage family Brassicaceae

Brassica is a genus of plants in the cabbage and mustard family (Brassicaceae). The members of the genus are informally known as cruciferous vegetables, cabbages, or mustard plants. Crops from this genus are sometimes called cole crops—derived from the Latin caulis, denoting the stem or stalk of a plant.

<span class="mw-page-title-main">Rutabaga</span> Root vegetable in the Brassica family

Rutabaga or swede is a root vegetable, a form of Brassica napus. Other names include Swedish turnip, neep (Scots), and turnip. However, elsewhere the name "turnip" usually refers to the related white turnip. The species Brassica napus originated as a hybrid between the cabbage and the turnip. Rutabaga roots are eaten as human food in various ways, and the leaves can be eaten as a leaf vegetable. The roots and tops are also used for livestock, either fed directly in the winter or foraged in the field during the other seasons. Scotland, Northern and Western England, Wales, the Isle of Man and Ireland had a tradition of carving the roots into lanterns at Halloween.

<i>Beta vulgaris</i> Species of flowering plant

Beta vulgaris (beet) is a species of flowering plant in the subfamily Betoideae of the family Amaranthaceae. Economically, it is the most important crop of the large order Caryophyllales. It has several cultivar groups: the sugar beet, of greatest importance to produce table sugar; the root vegetable known as the beetroot or garden beet; the leaf vegetable known as chard or spinach beet or silverbeet; and mangelwurzel, which is a fodder crop. Three subspecies are typically recognised. All cultivars fall into the subspecies Beta vulgaris subsp. vulgaris. The wild ancestor of the cultivated beets is the sea beet.

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Rapeseed, also known as rape, or oilseed rape, is a bright-yellow flowering member of the family Brassicaceae, cultivated mainly for its oil-rich seed, which naturally contains appreciable amounts of erucic acid. The term "canola" denotes a group of rapeseed cultivars that were bred to have very low levels of erucic acid and which are especially prized for use as human and animal food. Rapeseed is the third-largest source of vegetable oil and the second-largest source of protein meal in the world.

<span class="mw-page-title-main">Chinese cabbage</span> Vegetable of the bok choy plant

Chinese cabbage can refer to two cultivar groups of leaf vegetables often used in Chinese cuisine: the Pekinensis Group and the Chinensis Group.

<span class="mw-page-title-main">Rapini</span> Species of plant

Rapini or broccoli rabe is a green cruciferous vegetable, with the leaves, buds, and stems all being edible; the buds somewhat resemble broccoli, but do not form a large head. Rapini is known for its bitter taste, and is particularly associated with Mediterranean cuisine.

<span class="mw-page-title-main">Bok choy</span> Subspecies of flowering plant

Bok choy, pak choi or pok choi is a type of Chinese cabbage, used as food. Chinensis varieties do not form heads and have green leaf blades with lighter bulbous bottoms instead, forming a cluster reminiscent of mustard greens. It has a flavor between spinach and water chestnuts but is slightly sweeter, with a mildly peppery undertone. The green leaves have a stronger flavor than the white bulb.

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<i>Brassica nigra</i> Species of plant

Brassica nigra, or black mustard, is an annual plant cultivated for its dark-brown-to-black seeds, which are commonly used as a spice. It is native to tropical regions of North Africa, temperate regions of Europe, and parts of Asia.

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Brassica juncea, commonly brown mustard, Chinese mustard, Indian mustard, leaf mustard, Oriental mustard and vegetable mustard, is a species of mustard plant.

<i>Lepidium campestre</i> Species of flowering plant

Lepidium campestre, the field pepperwort or field pepperweed or field cress, is usually a biennial with some form of annual plant in the Brassicaceae or mustard family, native to Europe, but commonly found in North America as an invasive weed. The most notable characteristic of field pepperweed is the raceme of flowers which forks off of the stem. These racemes are made up of first small white flowers and later green, flat and oval seedpods each about 6 mm long and 4 mm wide. Each seedpod contains two brown, 2.5 mm long seeds.

Leptosphaeria maculans is a fungal pathogen of the phylum Ascomycota that is the causal agent of blackleg disease on Brassica crops. Its genome has been sequenced, and L. maculans is a well-studied model phytopathogenic fungus. Symptoms of blackleg generally include basal stem cankers, small grey lesions on leaves, and root rot. The major yield loss is due to stem canker. The fungus is dispersed by the wind as ascospores or rain splash in the case of the conidia. L. maculans grows best in wet conditions and a temperature range of 5–20 degrees Celsius. Rotation of crops, removal of stubble, application of fungicide, and crop resistance are all used to manage blackleg. The fungus is an important pathogen of Brassica napus (canola) crops.

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References

  1. "Brassica rapa L." Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 22 August 2022.
  2. 1 2 "Brassica rapa subsp. oleifera". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 13 April 2013.
  3. "Brassica rapa subsp. oleifera". Turnip Rape. EOL. Retrieved 13 April 2013.
  4. Clive Stace (1997). New Flora of the British Isles. Cambridge: Cambridge. ISBN   978-0-521-58935-2.
  5. Bailey's Dictionary (5th reprint ed.). 1731.
  6. Doreathea Hurst (1889). History and Antiquities of Horsham. Farncombe & Co.
  7. "Brassica rapa". Bioimages. cas.vanderbilt.edu. 2011. Archived from the original on 27 June 2010. Retrieved 10 June 2010.
  8. "History of Canola Seed Development | Canola Encyclopedia".
  9. 1 2 Tarlach, Gemma (11 June 2021). "The Deep Roots of the Vegetable That 'Took Over the World'". Atlas Obscura. Retrieved 30 June 2021.
  10. McAlvay, Alex C; Ragsdale, Aaron P; Mabry, Makenzie E; Qi, Xinshuai; Bird, Kevin A; Velasco, Pablo; An, Hong; Pires, J Chris; Emshwiller, Eve (2021). "Brassica rapa Domestication: Untangling Wild and Feral Forms and Convergence of Crop Morphotypes". Molecular Biology and Evolution. 38 (8): 3358–3372. doi:10.1093/molbev/msab108. PMC   8321528 . PMID   33930151.
  11. 1 2 3 Sanderson, Helen (2005). Prance, Ghillean; Nesbitt, Mark (eds.). The Cultural History of Plants. Routledge. p. 72. ISBN   0415927463.
  12. Phil Thomas, ed. (2003). "Canola Varieties". Canola Growers Manual. Canola Council of Canada. Archived from the original on 12 July 2009.
  13. Benoliel, Doug (2011). Northwest Foraging: The Classic Guide to Edible Plants of the Pacific Northwest (Rev. and updated ed.). Seattle, WA: Skipstone. pp. 83–84. ISBN   978-1-59485-366-1. OCLC   668195076.