A diallel cross among six parental peanut genotypes to obtain 15 crosses. All entries were evaluated in randomized complete block design with three replications under two different sowing dates for yield and quality character. Genotypes and its portioning mean squares were significant for all character under both and across sowing date except P vs. cross for oil % in second sowing date and protein % in both sowing date and across sowing dates . The parents In. 623, In.250 and In.324 gave a high value for pod yield, oil % and protein % respectively in both and across sowing dates . Significant mean squares for general (GCA) and specific (SCA) combining abilities were detected for all traits under study. GCA/SCA ratios were higher than unity, indicating that greatest role of the additive and additive x additive types of gene action in the expression of these traits. The parental peanut In. 623 showed positive and significant ĝi effects for yield and protein % under both and across sowing dates. The In.372 exercised positive and significant gi effects for yield and oil % under both and across sowing dates. In.171 gave positive and significant gi effects for oil % while, In. 324 give good general combiner for protein % at both and across sowing dates. The cross In.372xGiza6 exhibited positive and significant SCA effects for yield and oil % under both and across sowing dates. Additive (D) was highly significant for all traits in both sowing date. Similarly, (H1 and H2) components values were significantly positive for all traits. (H1) was greater than (H2) in all traits. Narrow-sense heritability (h²n.s) estimates was low for oil percent and protein percent. Meanwhile, (h²n.s) was high or medium for pod yield (Ard./Fad.). |
