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Semi-dwarf IR36 is a hybrid rice variety developed by Gurdev Khush.
| | This article needs additional citations for verification .(October 2019) |
Semi-dwarf IR36 is a hybrid rice variety developed by Gurdev Khush.
By cross-breeding together IR8 with 13 parent varieties from six nations, Dr. Khush developed IR36, a semi-dwarf variety that proved highly resistant to a number of the major insect pests and diseases that raised farmers' rice yields and drove down prices of the staple food for Asian families. [1] IR36 matures rapidly – 105 days compared to 130 days for IR8 and 150–170 days for traditional types – and produces the slender grain preferred in many countries. The combination of these characteristics soon made IR36 one of the most widely planted food crop varieties worldwide in just a few years. About 110,000 km² were planted with IR36 worldwide in 1981, [2] a success which Dr. Khush topped with IR64 and again with IR72 in 1990.
The variety was one of many of the Green Revolution which replaced many local strains and genetic diversity previously found in rice paddies. It is estimated that over 100,000 local strains were grown in 1960, which have been largely replaced by hybrid varieties.
Wheat is a grass widely cultivated for its seed, a cereal grain that is a worldwide staple food. The many species of wheat together make up the genus Triticum ; the most widely grown is common wheat. The archaeological record suggests that wheat was first cultivated in the regions of the Fertile Crescent around 9600 BCE. Botanically, the wheat kernel is a type of fruit called a caryopsis.
Rice is the seed of the grass species Oryza sativa or less commonly O. glaberrima. The name wild rice is usually used for species of the genera Zizania and Porteresia, both wild and domesticated, although the term may also be used for primitive or uncultivated varieties of Oryza.
The Green Revolution, also known as the Third Agricultural Revolution, was a period of technology transfer initiatives that saw greatly increased crop yields and agricultural production. These changes in agriculture began in developed countries after World War II and spread globally till the late 1980s. In the late 1960s, farmers began incorporating new technologies such as high-yielding varieties of cereals, particularly dwarf wheat and rice, and the widespread use of chemical fertilizers, pesticides, and controlled irrigation. Agriculture also saw the adoption of newer methods of cultivation, including mechanization. These changes were often implemented as a package of practices meant to replace traditional agricultural technology. These costlier technologies were often provided in conjunction with loans that were conditional on policy changes being made by the developing nations adopting them, such as privatizing fertilizer manufacture and distribution that was formerly done through public channels.
Intensive agriculture, also known as intensive farming, conventional, or industrial agriculture, is a type of agriculture, both of crop plants and of animals, with higher levels of input and output per unit of agricultural land area. It is characterized by a low fallow ratio, higher use of inputs such as capital and labour, and higher crop yields per unit land area.
Norman Ernest Borlaug was an American agronomist who led initiatives worldwide that contributed to the extensive increases in agricultural production termed the Green Revolution. Borlaug was awarded multiple honors for his work, including the Nobel Peace Prize, the Presidential Medal of Freedom and the Congressional Gold Medal.
The International Rice Research Institute (IRRI) is an international agricultural research and training organization with its headquarters in Los Baños, Laguna, in the Philippines, and offices in seventeen countries. IRRI is known for its work in developing rice varieties that contributed to the Green Revolution in the 1960s which preempted the famine in Asia.
Henry Monroe "Hank" Beachell was an American plant breeder. His research led to the development of hybrid rice cultivars that saved millions of people around the world from starvation.
Basmati, pronounced ['bɑːsmət̪iː], is a variety of long, slender-grained aromatic rice which is traditionally grown in India, Pakistan, and Nepal. As of 2019, India accounted for 65% of the international trade in basmati rice, while Pakistan accounted for the remaining 35%. Many countries use domestically grown basmati rice crops; however, basmati is geographically exclusive to certain districts of India and Pakistan.
Hybrid rice is a type of Asian rice that has been crossbred from two very different parent varieties. As with other types of hybrids, hybrid rice typically displays heterosis or "hybrid vigor", so when grown under the same conditions as comparable purebred rice varieties, it can produce up to 30% more yield. To produce hybrid seeds in large quantity, a purebred sterile rice variety is fertilized with fertile pollen from a different variety. High-yield crops, including hybrid rice, are one of the most important tools for combatting worldwide food crises.
Intensive crop farming is a modern industrialized form of crop farming. Intensive crop farming's methods include innovation in agricultural machinery, farming methods, genetic engineering technology, techniques for achieving economies of scale in production, the creation of new markets for consumption, patent protection of genetic information, and global trade. These methods are widespread in developed nations.
Biofortification is the idea of breeding crops to increase their nutritional value. This can be done either through conventional selective breeding, or through genetic engineering. Biofortification differs from ordinary fortification because it focuses on making plant foods more nutritious as the plants are growing, rather than having nutrients added to the foods when they are being processed. This is an important improvement on ordinary fortification when it comes to providing nutrients for the rural poor, who rarely have access to commercially fortified foods. As such, biofortification is seen as an upcoming strategy for dealing with deficiencies of micronutrients in low and middle-income countries. In the case of iron, the WHO estimated that biofortification could help curing the 2 billion people suffering from iron deficiency-induced anemia.
Gurdev Singh Khush is an Agronomist and Geneticist who, along with mentor Henry Beachell, received the 1996 World Food Prize for his achievements in enlarging and improving the global supply of rice during a time of exponential population growth.
Perennial rice are varieties of long-lived rice that are capable of regrowing season after season without reseeding; they are being developed by plant geneticists at several institutions. Although these varieties are genetically distinct and will be adapted for different climates and cropping systems, their lifespan is so different from other kinds of rice that they are collectively called perennial rice. Perennial rice—like many other perennial plants—can spread by horizontal stems below or just above the surface of the soil but they also reproduce sexually by producing flowers, pollen and seeds. As with any other grain crop, it is the seeds that are harvested and eaten by humans.
Plant breeding is the science of changing the traits of plants in order to produce desired characteristics. It has been used to improve the quality of nutrition in products for humans and animals. The goals of plant breeding are to produce crop varieties that boast unique and superior traits for a variety of applications. The most frequently addressed agricultural traits are those related to biotic and abiotic stress tolerance, grain or biomass yield, end-use quality characteristics such as taste or the concentrations of specific biological molecules and ease of processing.
Mutation breeding, sometimes referred to as "variation breeding", is the process of exposing seeds to chemicals, radiation, or enzymes in order to generate mutants with desirable traits to be bred with other cultivars. Plants created using mutagenesis are sometimes called mutagenic plants or mutagenic seeds.
Plant breeding started with sedentary agriculture, particularly the domestication of the first agricultural plants, a practice which is estimated to date back 9,000 to 11,000 years. Initially, early human farmers selected food plants with particular desirable characteristics and used these as a seed source for subsequent generations, resulting in an accumulation of characteristics over time. In time however, experiments began with deliberate hybridization, the science and understanding of which was greatly enhanced by the work of Gregor Mendel. Mendel's work ultimately led to the new science of genetics. Modern plant breeding is applied genetics, but its scientific basis is broader, covering molecular biology, cytology, systematics, physiology, pathology, entomology, chemistry, and statistics (biometrics). It has also developed its own technology. Plant breeding efforts are divided into a number of different historical landmarks.
Ebrahimali Abubacker Siddiq is an Indian agricultural scientist, whose research in genetics and plant breeding is reported to have assisted in the development of various high-yielding rice varieties such as dwarf basmati and hybrid rice. The government of India honoured Siddiq in 2011 with the fourth-highest civilian award of Padma Shri.
Neelamraju Ganga Prasada Rao was an Indian geneticist and plant breeder, known for his efforts in developing hybrid varieties of sorghum, which earned him the moniker, the Father of Hybrid Sorghum. He was the vice chancellor of Vasantrao Naik Marathwada Agricultural University and chaired the Agricultural Scientists Recruitment Board of the Indian Council of Agricultural Research. He was a recipient of several national honors including Rafi Ahmed Kidwai Award and the VASVIK Industrial Research Award. The Council of Scientific and Industrial Research, the apex agency of the Government of India for scientific research, awarded him the Shanti Swarup Bhatnagar Prize for Science and Technology, one of the highest Indian science awards, in 1966, for his contributions to biological sciences.
IR8 is a high-yielding semi-dwarf rice variety developed by the International Rice Research Institute (IRRI) in the early 1960s. It was developed by an IRRI team consisting of Jennings, Hank Beachell, Akira Tanaka, T.T. Chang, S.K. De Datta, and Robert Chandler. In November 1966, IR8 was introduced in the Philippines and India. Promoters such as the IRRI and farmer benefactors of IR8 have called it 'miracle rice', and celebrate it for fighting famine. IR8 dramatically increased the yields of Asian rice from 1 or 2 ton per hectare to 4 or 5 tons per hectare. It played a significant part in the Green Revolution.
Dolores A. Ramirez is a Filipino geneticist. She specializes in plant breeding and plant cytogenetics. She was named a National Scientist of the Philippines in 1998.
