Genetic analysis of agronomic characters in chickpea. I. Estimates of genetic variances from diallel mating designs

Singh, Onkar and Gowda, C L L and Sethi, S C and Dasgupta, T and Smithson, J B (1992) Genetic analysis of agronomic characters in chickpea. I. Estimates of genetic variances from diallel mating designs. TAG Theoretical and Applied Genetics, 83 (8). pp. 956-962. ISSN 1432-2242

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Twenty-eight diallel trials over 8 years and two locations were analysed to estimate genetic variances for agronomic characters of chickpea (Cicer arietinum L.). The data were analysed according to Method 4 and Model I of Griffing (1956). Days to flowering, plant height, and seed size were found to be predominantly under additive inheritance and were highly predictable. Both additive and non-additive genetic components were important for seed yield, number of branches, pods per plant, and seeds per pod. Although both general combining ability (gca) and specific combining ability (sca) varied significantly with generation, components of gca mean squares were invariably much larger than gca x generation interaction components, indicating that either the F lor the F2 generation can be used to estimate the gca components effectively. Combined diallel analysis of F 2S over locations revealed the importance of combining ability x location . interactions and emphasized the need for testing over more than one location for the precise estimation of combining ability. The implications of these fmdings and those reported earlier in the literature on the breeding strategies/methods for the genetic improvement of agronomic characters in cbjckpea are discussed.

Item Type: Article
Uncontrolled Keywords: Chickpea - Diallel analysis - Yield and yield components - Gene effects - Genotype x environment interaction
Subjects: Mandate crops > Chickpea
Depositing User: Users 6 not found.
Date Deposited: 02 Nov 2011 03:57
Last Modified: 02 Nov 2011 03:57
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Acknowledgement: UNSPECIFIED
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