Estimation of genetic parameters, correlation and path coefficients in F3 of soe barley families under saline conditions
2009
Hassan, A.I.A.
The results indicated that the dominance genetic variance accounted the major part in controlling, the additive genetic portion affeared to be the prevailed type controlling K/Na ratio and sulfate (SO4) contents on the contrary, the dominance genetic component was found to be more important in controlling proline and magnesium contents in most crosses. Heritability estimate in broad sense were high, whereas it was moderately high in narrow sense for chemical component. The additive genetic portion affeared to be prevailed, type controlling 1000-grain weight, while, the dominance genetic component was found to be more important in controlling number of grains/spike and grain yield /plant in most crosses. Heritability estimate in broad sense were high whereas, it was moderately low in narrow sense for grain yield and its attributes. Correlations between grain yield/ plant and each of the chemical composition of leaves as well as yield components were positive and significant in most cases except for Cl content which was negatively correlated with grain yield/ plant. The total contribution of each chemical components in leaves showed that proline content was the most powerful determinant of grain yield in Giza-1 23 x ACSAD-5 F3 families as it contributed by 20.33%. In general, chemical contents could he arranged over all studied F3 populations as their importance as follows i.e. SO4, proline, Mg, K/Na and CI contents. The main source of grain yield variation under salinity condition was for 1000-grain weight followed by number of grains/spike and number of spikes/ plant in three or more of F3 families. Such highly contributed traits easily measured and gave a valuable idea for selection to yield improvement under saline environments.
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