Abstract

                                The performance of the eight genetically diverse varieties of barley and their 28 Fis was evaluated to assess their genetic architecture for the yield and yield contributing traits in a set of diallel crosses. The component analysis indicated the presence of additive (B) and dominance (A and A2) genetic variances for plant height length of main spike and grain yield/plant. Ô component was higher than A, for plant height, number of grains/main spike and biological yield per plant. For remaining characters A was higher than B component, indicating the preponderance of dominance genetic variance. Over dominance was observed for days to reproductive phase, number of productive tillers/plants, length of main spike and grain yield/plant. Highly significant values of f were observed only for plant height indicating the predominance of dominant alleles. While highly significant values of fi2 were recorded for all the traits except days to reproductive phase revealing the predominance of dominant alleles.

Key words : Component, Analysis, Metric Traits, Barley