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Each plant receives a blend of pollen from a large number of individuals each having different genotypes. Such populations are characterized by a high degree of heterozygosity with tremendous free and potential genetic variation, which is maintained in a steady state by free gene flow among individuals within the populations.
Robert Wayne Allard (September 3, 1919 – March 25, 2003) was an American plant breeder and plant population geneticist who is widely regarded as one of the leading plant population geneticists of the 20th century. [1]
Plant breeding is the science of changing the traits of plants in order to produce desired characteristics. [1] It is used to improve the quality of plant products for use by humans and animals. [2] The goals of plant breeding are to produce crop varieties that boast unique and superior traits for a variety of applications.
Salaman developed methods to test for the presence of viruses in seed potatoes and developed techniques to build up stocks of virus-free seed potatoes, a technique adopted by many other countries. [9] Yeoman II was released in 1925 but was a commercial failure, and marked the high point of Mendelian thinking in UK plant breeding. [5]
SibNIIRS has developed methods for breeding of new plant species using diploidization, introgressive hybridization, alloplasmia and aneuploidy. The breeders of the institute have developed varieties of spring wheat with a high level of gluten (28–30%) and protein (14–16%), as well as new varieties of oats.
Other molecular breeding tool include development of genetically modified crops that can tolerate plant stress. As a complement to the recent rapid progress in genomics , a better understanding of physiological mechanisms of dehydration response will also contribute to the progress of genetic enhancement of crop drought resistance.
Xenia effects in maize. Xenia (also known as the xenia effect) in plants is the effect of pollen on seeds and fruit of the fertilized plant. [1] The effect is separate from the contribution of the pollen towards the next generation.
The Plant Patent Act of 1930 gave plant breeders the same status as mechanical and chemical inventors had through patent law. [2] The early objectives of the breeding stations were to develop new varieties to better satisfy the American demand for better dessert, canning and freezing varieties. [ 1 ]