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Genetic Variability in the Mungbean, Vigna radiata (L.) Wilczek

Three hundred and twenty-one strains of mungbeans , [Vignu radiata (L.) Wilczek] originating from 18 American, Asian, African, and Middle Eastern countries were grown at Columbia, Mo. and evaluated for yield, days to first ripe pod, plant height, length of first branch, pods per plant, number seeds per pod, 1000 seed weight, virus resistance, mildew resistance, percent protein, percent lysine, and percent methionine. A wide range in genetic variability was identified for each character examined. Performance of the 32 (10%,) highest-yielding strains is compared with the performance of the total population of 321 strains. Relative to the total population, the high-yielding strains tended to be moderately early, to have moderately large-size plants as measured by height and length of the first branch, to have a large number of seeds per pod and moderately high seed weight, and to be resistant to virus. Protein, lysine, and methionine content varied widely among the high-yielding strains. No single strain excelled in the three yield components — pod number, seeds per pod, and seed weight — or in the three nutritional components — protein, lysine, and methionine.

Key Words: Green gram • Pulse • Germplasm resources • Yield components • Protein • Lysine • Methionine

² Graduate Assistant and Professor of Agronomy, respectively, University of Missouri, Columbia, Mo. 65201.

Received for publication December 15, 1971.