PRIMARY LEAF SIZE AS A SELECTION CRITERION FOR VEGETABLE SOYBEAN
Vegetable soybean variety, AGS 292 (P1), grain soybean, AGS 313(P2); F1 of reciprocal crosses (P1 x P2) and (P2 x P1) and F3 population were used to study the usefulness of primary leaf as a selection criterion for improving seed size in vegetable soybean. Frequency distributions, correlation coefficients, and heritability estimates were calculated for ten characters measured in P1, P2, F1 and F3 populations. The mean values of F1 were close to mid-parent mean for most traits with the exception of three-seeded pods, total pods and 100 seed weight. A normal distribution of F3 population was observed for the following characters: leaf width, leaf length, leaf area, number of nodes, number of branches and 100 seed weight. Heritability values were high for 100 seed weight, one-seeded pods and node number. In F3 population, high positive correlations were found among leaf width, leaf length, leaf area, node number, branch number, one-seeded pods, two-seeded pods, three-seeded pods and 100 seed weight. High negative correlations were found between node number, two-seeded pods, three-seeded pods, total pods and 100 seed weight. Using the P1, P2, F1 and F3 data it is possible to conclude that to obtain large seed size, the number of nodes per plant, branches per plant, and pods per plant should be reduced. Further study is needed to determine the usefulness of primary leaf as a selection criterion.
Wasee, S., Srinives, P. and Shanmugasundaram, S. (1992). PRIMARY LEAF SIZE AS A SELECTION CRITERION FOR VEGETABLE SOYBEAN. Acta Hortic. 292, 135-142