Inheritance of seedling heat tolerance and maturity traits in diallel F-1 hybrids of pearl millet (Pennisetum glaucum) (original) (raw)

Indian Journal of Agricultural Sciences

Abstract

A half-diallel mating system involving ten parents was used in the present study to determine the nature of gene action and genetic parameters in pearl millet [Pennisetum glaucum (L.) R. Br.]. The Vr-Wr graph indicated over dominance for emergence rate, number of leaves/seedling, seedling height, fresh weight/seedling, dry weight/seedling, panicle emergence, number of effective tillers/plant, plant height, ear weight/plant, dry fodder yield/plant, grain yield/plant and total biological yield/plant. Partial dominance was observed for seedling thermo-tolerance index and ear length. The epistasis was found to be absent for emergence rate, seedling thermo-tolerance index, seed to seedling thermo-tolerance index, ear length, seedling height and plant height. The additive component of variance ( D) had a significant presence for STI and SSTI in both the stress environments. The effect of over dominance was also reflected by higher degree of overall dominance effect (h(2)) for both these c...

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