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Regressions, correlations and combining ability of some quantitative characters in peas (Pisum sativum L.)

  • B. S. Dahiya, J. S. Brar and R. K. Bajaj (a1)

Summary

Eight cultivars of peas (Pisum sativum L.) were evaluated for six traits in a diallel experiment using regression coefficients, correlations and combining ability estimates. Regression coefficient was high, indicating large additive effects for 100-grain weight. Yield was significantly and positively correlated with plant height, number of pods per plant and 100-grain weight, indicating that selection for either of these would result in higher yield. The best index of yield among the traits studied was number of pods per plant. Significant general combining ability (GCA) variances and specific combining ability (SCA) variances were observed. GCA variances were larger than SCA variances except for yield, suggesting predominance of additive gene effects.

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References

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Falconer, D. S. (1960). Introduction to Quantitative Genetics. New York: Ronald Press.
Grifflng, B. (1956). Concept of general and specific combining ability in relation to diallel crossing systems. Australian Journal of Biological Sciences 9, 463–92.
Krabup, A. & Davis, D. W. (1970). Inheritance of seed yield and its components in a six parent diallel cross in peas. Journal American Society of Horticultural Science 95, 795–7.
Kumar, H. & Das, K. (1974). Diallel analysis of yield and its components in peas. Indian Journal of Genetics and Plant Breeding 34, 318–22.
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Saucha, A. S. & Singh, B. V. (1973). Correlation studies in Pisum sativum L. Madras Agricultural Journal 60, 1354–8.

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