МЕЖВИДОВАЯ ГИБРИДИЗАЦИЯ ПШЕНИЦЫ И ЕЁ РОЛЬ В СЕЛЕКЦИИ
Journal Title: INTERNATIONAL ACADEMY JOURNAL "Web of Scholar" - Year 2017, Vol 1, Issue 9
Abstract
Interspecific cross are very often sterile; thus, hybrid sterility prevents the movement of genes from one species to the other, keeping both species distinct. Most often, other processes occurring in plants keep gametic isolation and species distinction. Species often have different mating or courtship patterns or behaviors, the breeding seasons may be distinct and even if mating does occur antigenic reactions to the sperm of other species prevent fertilization or embryo development. Hybridization is much more common among organisms that spawn indiscriminately, like soft corals and among plants. While it is possible to predict the genetic composition of a backcross on average, it is not possible to accurately predict the composition of a particular backcrossed individual, due to random segregation of chromosomes. In a species with two pairs of chromosomes, a twice-backcrossed individual would be predicted to contain 12,5 % of one species genome.
Authors and Affiliations
К. Э. Бабаева
Keywords
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