Gene action studies for some economic traits in spring wheat
2007
Cheema, N.M. (Barani Agricultural Research Inst., Chakwal (Pakistan)) | Ihsan,M. (Barani Agricultural Research Inst., Chakwal (Pakistan)) | Mian, M.A. (Barani Agricultural Research Inst., Chakwal (Pakistan)) | Rabbani, G. | Tariq, M.A. | Mahmood, A.
Gene action studies were conducted for grain yield and some other important economic traits in 25 cross combinations of spring wheat under rainfed conditions. The genotypes exhibited significant differences for number of productive tillers/plant, spike length, number of spikelets/spike, number of grains/spike, 1000-grain weight and grain yield/plant. Combining ability analysis revealed that mean squares due to Specific Combining Ability were significantly higher than those of General Combining Ability and reciprocal effects. Larger portion of the total variance was attributable to the SCA effects in all the traits studied indicating that these traits were predominantly controlled by non-additive type of gene action. Cross combinations GPW-273 x GPW-37, GPW-272 x GPW-36 and GPW-272 x GPW-37 proved good specific combinations which may produce segregants with more number of productive tillers/plant, more number of grains/spike and higher seed weight resulting in the development of high yielding wheat varieties for the rainfed areas.
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