Diallel analysis of agronomic traits in winter rye.

Henryk Bujak

Abstract

An analysis of combining ability of rye, based on F₁ generation hybrids, was performed in order to select lines of high effects of general combining ability which are useful for creation of population and synthetic varieties as well as hybrids giving high effects of specific combining ability. The main aim of the present paper was to recognize the actions of genes responsible for quantitative traits and combining ability of rye inbred lines on the basis of F₁  and F₂  hybrids analysis.The study material included 56 F₁ generation hybrids obtained though diallel-cross with 8 parent lines as well as 56 F₂  generation hybrids crossed with 8 parent lines.A genetic analysis of generation F₂ yields results and GCA estimates which substantially correspond with those obtained for generation F₁. The closest results were obtained for plant height, ear length and 1000-grain weight. For cultivation purposes, an analysis of generation F₂  will be reliable and the selection based on it successful. Most of the studied lines were found to essentially influence the effects of general combining ability. The most recommendable is the line SMH-49 whose progeny was characterized both by shortened leaves and increased 1000-grain weight and the weight of grains per ear.