Analysis of the Influence of Gene Environment Interaction on the Phenotypic Values of Correlation and Regression Indexes in Crosses between Seed and Seedless Varieties of Vine (V. vitifera L.)

V. ROYTCHEV
Agricultural University, BG - 4000 Plovdiv, Bulgaria

Abstract

ROYTCHEV, V., 2006. Analysis of the influence of gene environment interaction on the phenotypic values of correlation and regression indexes in crosses between seed and seedless varieties of vine (V. vitifera L.). Bulg. J. Agric. Sci., 12: 405-411

We have studied the influence of the gene-environment interaction on the phenotypic values of the correlation and regression indexes in crosses between seed and seedless varieties of vine. It was established that in the Fl generation of almost all crosses the phenotypic correlation indexes are multidirectional but well pronounced. As concerns the correlation indexes, the genotype-environment effects in the different offspring are relatively weaker in crosses like Super Early Bolgar x Russalka 1 and Armira x Russalka 1 and stronger in Hybrid 28-13 x Russalka. The phenotypic regression indexes also vary within a broad range and their genotype-environment effect is best pronounced in crosses Super Early Bolgar x Russalka 1 and Armira x Russalka 1, and less in Hybrid 28-13 x Russalka. The analysis offers the opportunity to use these correlation and regression indexes to forecast the selection of elite hybrids according to one of the correlating traits.

Key words: genotype-environment, phenotypic values, correlation and regression indexes, sugars and acids, crosses between seed and seedless sorts of vine