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Abstract

The research was initiated by developing five generations (P1, P2, F1, F2 and F3) of the seven cross combinations of wheat including RK-23 × Maxipak, RK-23 × Inqilab, RK-23 × Seher, RK-23 × Zincol, RK-23 × Shahkar, RK-23 × Borlague and RK-23 × Gold. All the generations of each cross were sown at two locations i.e Agricultural research institute (ARI), D. I. Khan and Cereal crops research institute (CCRI), PirSabak, Nowshehra. Analysis of variance (ANOVA) shows that effect of environment was significant for all the traits. Significant/highly significant differences were recorded among generations (P1, P2, F1, F2 and F3) in most of the cross combinations. Significant generations × location interaction was noted in most of the cross combinations. The data regarding mean of generations reveal that Maxipak variety and its segregating generations exhibited highest mean values for spikelets spike-1(22.7) and awn length (8.6 cm) in F1 of RK-23 × Maxipak. Highest mean was recorded for spike length (17.4 cm) in in F1, F2 and F3 generations of RK-23 × Gold. Gene action study shows that inheritence of spike length and spikletes spike-1 was controlled by additive and epistasis types of gene effects in most of the cross combinations. Awn length was under the influnce of dominant × dominat gene effect in most of the cross combinations, while few cross combinations also showed dominant and additive types of gene effects.

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