Author(s):

AA Shah, SK Mondal, I Rather, H Khurshid and AA Wani

Abstract: Introgression of winter wheat gene pool in spring wheat is one of the potential approaches to break the yield barrier. To assess the combining ability of yield and yield contributing traits, ten diverse winter wheat or their derivatives were crossed with three spring wheat testers in line x tester fashion to generate 30 cross combinations.. The thirty F₁ hybrids along with the 13 parents (10 lines and 3 testers) were evaluated in randomized block design during rabi 2016-17 at university Research Farm of Sher-e- Kashmir university of Agricultural Sciences and Technology, Jammu (SKUAST,J)Main campus,Chatha. The gca effects was greater than sca effects for most of the yield and yield attributing traits. The compassion of relative magnitude of gca and sca variances indicated greater magnitude of gca variance than sca variance for yield traits, indicating the presence of additive gene action for the inheritance of these traits. On the basis overall ranking of the parents for gca,the lines Arkaan,Blue boy, Nordresprez,Diana and WW25 and in testers WH1080, PBW 175 revealed desirable significant effect for many traits. Crosses China x PBW 175 for tillers per plant; WW25x WH 1080 for spike length; Arkaan x WH 1080 for biological yield per plant, harvest index and grains per plant Arkaan x PBW 644; for grain yield WW21 x WH 1080 were possessing desirable significant sca for yield contributing traits in the F₁ generation. The allelic resources of these lines and testers could be utilized in a multiline crossing approach to generate substantial genetic variability.

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