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Published in Crop Sci 10:240-241 (1970)
© 1970 Crop Science Society of America
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Heritability Estimates of Quantitative Characters in Mung Bean (Phaseolus aureus Roxb.)1

L. T. Empig, R. M. Lantican and P. B. Escuro2

Heritability (broad sense) estimates of nine quantitative characters were obtained in the F2 of five crosses of mung bean strains. The estimation procedure used was the direct method wherein environmental variance was approximated with the use of the parents. Days to maturity had the highest heritability estimate with a mean of 71.2% for the five crosses. Mean estimate of heritability of 8.6% for seed yield was the lowest.

In the F3, heritability (broad sense) estimates for seed yield and its components, namely, pods per plant, seeds per pod, seed weight, and seeds per plant were calculated by variance component analysis in one of the five crosses. Seed weight had the highest estimate of heritability which was 85%, whereas number of seeds per plant had the lowest value of 26%. Seed yield had an estimate of 47%.

Based on the F2 data, maturity range had the highest expected genetic progress (37% of the mean) obtainable by selecting the top 5% of the F2 progenies. Seed yield had only 5% expected genetic progress.

The implications of these results to breeding programs designed to maximize yield levels in mung bean were discussed.

Key Words: Genetic advance • Genetic coefficient of variation

1 Central Experiment Station Contribution No. 2045, University of the Philippines, College, Laguna, Philippines. Part of a thesis submitted by the senior author to the Graduate School, University of the Philippines, College of Agriculture in partial fulfillment of the requirements for the degree of Master of Science in Plant Breeding.

2 Formerly Research Assistant, University of the Philippines, College of Agriculture, College, Laguna, Philippines (Present address, University of Nebraska, Lincoln, Nebraska); Associate Professor and Professor, respectively, University of the Philippines, College of Agriculture, College, Laguna, Philippines.

Received for publication October 2, 1969.




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