Genetics characteristics donor dominance short stem and large grain winter rye (Secale cereale L.)

Abstract

By means of directed selection during 39 generations of Rye plants bearing the highest expression of short stem in combination with largest size of grain, a donor of dominant short stem and recessive complimentary or epistatic large size grain has been obtained. Dependence of Rye grain size on two complimentary or independent alleles of genes in homozygote state, namely lg (large grain) and tg (thick grain) has been first time reported. Short stem and recessive grain size donor is homozygotic by the characteristic “Short upper internode”, albeit hybridologic analyzes on dominance-recessivity has not been performed. Correlative analyzes to breeding purposes is only applicable to perform by determining relations between characteristics in generations. In order to process the breeding strategy phenotype and genotype variability shall be assessed in the source material, as well as coefficients of multiple and pair correlation of desired breeding characteristics. On the base of parameter indexes to develop plans of selections and directed crossings with predicting the disjointing results in the next and subsequent generations of hybrids and determine strategy and tactic of for the development of desired characteristics in breading. This is the only way from the art to the science.