Ten agronomic characters were studied in Fz generation obtained from 5x5 half diallel barley cross.Both additive with
predominant positive genes and dominance effects witb asymetrically distribution were responsible for the inberitance of such traits. Additive gene effects was important than non-additive in the inheritance of most of the studied triats, suggesting the effectiveness of selection in F~ Hon-additive gene effects was the most importance for no. of tillers/plant, lOOO-kernel weight and grain yield/spike. Cases of partial,compl~te dominance and overdom~nance relationships were detected in Fz generation for these traits. One group of genes appeared to be .controlled the inheritance of all studied traits, except no. of tillers/plant and
lOOO-kernel weight which governed by 2-3 groups of qer.e s ,
Heritability in narrow sense was high for the majority of traits. The relation between parental mean and dominance order showed that non of parent was Completelly dominant or reces~;ive for any of these characters. Graphical analysis showed that the introduced two rows varieties possessed the most dominant g8nes for most of studied traits, while the Egyptian six rows variety H. Sahrawy had recessive genes.Estimate~, of narrow sense heritabilities suggested that selection could achieved in the early generations for yield characters in barley. |
