ABSTRACT
Abstract ................................................................................................... 39 3.1 Introduction .................................................................................... 40 3.2 Material and Methodology ............................................................. 42 3.3 Results and Discussion .................................................................. 43 3.4 Conclusions .................................................................................... 56 Keywords ................................................................................................ 56 References ............................................................................................... 57
ABSTRACT
The opportunity of obtaining of high-resistant oat samples by methods of traditional selection and in vitro was investigated. It was shown, that increased resistance of plant regenerants not always has a genetic nature. On the other hand, the transfer of a level of aluminum resistance from parents to hybrids at traditional crossings has no precise laws. The mechanisms of aluminum resistance acting at the cellular level provide an opportunity of obtaining resistant forms of plants by the cell culture methods. In practice, however, this approach has not become widely used
because of difficulties of plant regeneration from callus culture. We consider the main causes of low efficiency of the approach. They include high intraspecific heterogeneity of cereal crops with regard to aluminum resistance; conventionality of the division of genotypes into resistant and sensitive one, accepted in practice; appearance of acid-and aluminumresistant regenerants not only under stress but also under control (favorable) conditions without any action of the stress factor under study; lack of appropriate methods, connected to the specific behavior of aluminum ions in various growth media, when incorrectly chosen medium composition or pH conceal the action of aluminum per se. As a result of joint action of all the reasons mentioned in the chapter, the offered techniques of creation of high-resistant regenerants of cereal crops are behind traditional methods of intravarietal selection in duration, labor consumption, cost, and efficiency.
