Ngày nhận bài: 20-02-2017 / Ngày duyệt đăng: 27-04-2017 / Ngày xuất bản: 06-08-2025
The expression and inheritance of various agronomic traits were studied inF2 mungbean population from the cross Berken/DX92-1 and its parents. Segregations were observed in all measured traits in F2 population. Qualitative traits including morphological and visual seed traits exhibited single or two gene models depending on circumstances. Single gene model included leaf color, flower color, seed color, hilum color, seed shinness, and pod shape; two gene model included seed shape, pod color, and stem color. There were no significant differences in phenological traits between parents, resulting in low variation in F2 progeny. The growth duration of F2 progeny was in the range of 71 - 76 days, indicating short growth duration. For most quantitative traits, the means of morphological, vegetative and yield related traits were higher than parents. There were transgressive segregations for leaf size, pod size, seed yield, and pod dry mass. The coefficients of variation varied from 0.9 - 40.5%. Low broad-sense heritability estimates, 2.2 - 59.8%, for most traits indicated large environmental effects on trait expression. The exceptional traits included leaflet and pod width with high broad-sense heritability of 90.4% and 97%, respectively while individual seed yield and standing dry biomass with average broad-sense heritability of 64.9% and 66.8%, respectively. Average seed yield of F2 population was similar to Berken but some individuals exhibited higher seed yield than Berken which could be further advanced and studied.
