CORRELATION OF EFFECTS OF THE GENERAL COMBINATION ABILITY AND THE SIGN OF THE DURATION OF THE SPRING-HILLING PERIOD IN SPRING BARLEY VARIETIES

Abstract

Determination of the combining ability of varieties and F1 of spring barley is a necessary element in breeding for productivity. The results of the analysis of the general combining ability (GCA) and specific combining ability (SCА) make it possible to organize work on a specific studied feature, to select components for obtaining new hybrid combinations. The method of diallelic crosses was used in the work. The effects of GCA and SCА of spring barley were revealed on the feature of "duration of the germination-heading period". Between the effects of GCA and the estimates of the feature "duration of the seedling-heading period" in varieties there is a high correlation, therefore the value of the feature is an analogous feature of the breeding value, as well as the GCA effect. The stability of GCA effects over the years does not differ from the stability of the germination-heading period, which indicates the same efficiency of selection for any of these features. In the context of climate change towards warming, the determination of the combining ability is an additional tool for predicting selections for this feature.