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Pakistan Journal of Biological Sciences

Year: 1999  |  Volume: 2  |  Issue: 3  |  Page No.: 781 - 790

Inheritance of Some Growth Parameters in Bread Wheat

Naeem Mahmood and Muhammad Aslam Chowdhry

Abstract

A full diallel cross involving six bread wheat genotypes was evaluated for the inheritance of some growth parameters. Mean values displayed significant reduction of 17.50, 20.60, 17.67, 15.54, 15.25 and 28.04 per cent for days to heading, plant height, fertile tillers, days to maturity, grain filling period (GFP) and grain yield per plant under late planting, respectively, as compared to normal planting. Genetic analysis revealed that additive gene action for days to heading and maturity and grain filling period under normal planting changed to dominant under late planting, while overdominant gene action for plant height changed to additive and additive gene action for fertile tillers per plant and grain yield per plant remained unchanged. Dominant genes were responsible for early heading, fertile tillers per plant and GFP under both plantings while dominant gene control for plant height and days to maturity under normal planting changed to recessive under late planting. Similarly, gene control for grain yield per plant changed from recessive to dominant under late planting.

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