Sen' O. Details of the manifestation of heterosis in winter rye hybrids with dominant shortness and their use in breeding

Subject of inquiry - the details of heterosis effect display in winter rye hybrids. The research purpoze - the determination of heredity and expression of the features of heterosis effect display on the productivity and elements of its structure in winter rye hybrids and their use in breeding by means of the development of high-yielding varieties -synthetics. The research methods are generally accepted in breeding for heterosis. The details of heterosis effect display and genetic conditionality in winter rye with dominant shortness on the level of productivity are revealed; the new genetic sources that combine the high level of combining ability on the yield when preserving shortness are selected. The recommendations are developed for the breeding practice which are based on specific high-heterotic combinations of crosses depending on the heterosis effect use whot secures the increase of the efficiency of breeding work. The new dominant-shortstalked synthetic varieties Synthetic DS, Synthetic 38, Synthetic 52 and Arfa are developed. They secure the increase in grain yield by 0.35-0.80 metric tons/ha as compared with the standard. The field of application - the breeding practice.