Application of genotype-environment indices for selection evaluation of hybrid forms in F1 progeny of a cross between a seeded and а seedless vine cultivar

Venelin Roychev

Abstract: The application of genotype-environment indices for the purposes of selection evaluation by quantitative traits of hybrid forms in F1 progeny of a cross between a seeded and a seedless vine cultivar has been studied. It has been found that the effect of genes interacting with the environment varies to a significant extent in the traits budding – technological maturity, cluster weight, weight of 100 berries, sugar and acid contents, thus creating a prerequisite for a result-based selection. The level of the expressiveness and stabilizing/destabilizing impact of these genes on the theoretical phenotypic values of the researched agrobiological and technological characteristics in different environments varies in the studied hybrid forms. The specific variability according to the traits and seedlings provides the possibility for an appropriate combination of different commercially significant features within the selection process. Two elite seeded seedlings with a hermaphrodite flower type and three seedless ones with a functionally male flower type possessing economically valuable characteristics, have been selected from
the hybrid combination Armira x Russalka 1.

Keywords: genotype-environment interaction; quantitative traits; selection; vine

Date published: 2018-07-12