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Pakistan Journal of Biological Sciences

Year: 2003  |  Volume: 6  |  Issue: 18  |  Page No.: 1586 - 1590

Mechanism of Genetic Control of Some Quantitative Traits in Bread Wheat

Muhammad Kashif and Ihsan Khaliq

Abstract

A 5 x 5 diallel cross of spring wheat (Triticum aestivum L.) was conducted to estimate the gene action for some polygenic traits like plant height, flag leaf area, fertile tillers per plant, spike length, spikelets per spike, grains per spike, 1000-grain weight and grain yield per plant. Additive type of gene action with partial dominance was observed for flag leaf area, fertile tillers per plant, spike length, spikelets per spike and grains per spike, suggesting early selection for fairly good improvement in these traits. While over dominance for plant height, 1000-grain weight and grain yield per plant indicated fruitful selection in the later segregating generations. Epistasis was absent for all the traits studied.

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