Combining ability analysis of bread quality in wheat

Abstract

To evaluate the inheritance traits of bread making quality of bread wheat, the F 1 seeds of a 5 5× half diallel along with their parents were grown in watered and termin al drought conditions in randomized complete block design with two replications at Islamic Azad University, A rdabil, Iran in 2009. The grain protein content, Ze leny sedimentation volume, loaf volume, grain moisture cgrain hardness, water absorption, SDS-sedim entation volume, wet gluten content, thousand kernel mass an d hectoliter mass were measured. The result of comb ined analysis of variance (in two environments) showed t hat there are significant differences among genotyp es for all of the traits excepts for Zeleny sedimentation volume, grain moisture content and wet gluten content, ind icating the presence of enough genetic availability among genot ypes and as a result genotype mean square can be fu rther separated to general and specific combining ability mean squares. Furthermore, it was concluded that t he conditions of drought stress has significance on th e grain protein content, SDS-sedimentation volume, wet gluten content,thousand kernel mass and hectoliter mass. A signification GCA and SCA for some traits also obs erved additive and non additive gene affects in this trai ts.