Determination of combining abilities in the F2 generation of half diallel cross for some yield and qualty components in nine bread wheat (Triticum aestivum L.) cultivars

This study was carried out in Tekirdağ Namık Kemal University Faculty of Agriculture in the 2019-2020 growing season in order to examine the combination abilities and heterosis values in terms of some agronomic and quality traits in non-reciprocal half diallel hybrid F2 progeny of nine wheat (Triticum aestivum L.) genotypes of different origins. In the study, plant height, spike length, number of grains per spike, grain weight per spike, thousand grain weight, harvest index, grain yield, test weight, wet gluten ratio, sedimentation, protein ratio traits were investigated. Combination abilities analyzes for each character examined were made according to Griffin Method II, Model I. The effects of general combining ability of parents and specific combining ability of hybrids were found to be statistically significant in all examined characters. Considering their general combination abilities of Maden, NKU Ergene and Glosa varieties can be used succesfully at breedind programs for incresing yield. Also Segor, and Maden varieties can be used atbreeding programs for increasing quality. The General Combination Abilities/Special Combination Abilities ratio was found to be greater from 1 for the characters in the study. This value indicates that there are additive gene effects in inheritance for all characters.