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• W4239836277 abstract "Induced mutagenesis, used mainly to broaden the genetic variation, forms the core of mutation breeding research. The present study aimed at enhancing the genetic variability for various quantitative and qualitative traits of mungbean (Vigna radiata (L.) Wilczek) through induced chemical mutagenesis for achieving desired plant characteristics. Various types of abnormalities in cotyledonary and vegetative leaves were recorded in M2 population following mutagenesis with ethylmethane sulphonate (EMS) and sodium azide (SA). Compared to the control (parent variety), the frequency of cotyledonary and leaf abnormalities was larger in EMS treatments. The extent of genetic variability for plant height, days to flowering, days to maturity, fertile branches per plant, pods per plant, 100-seed weight (g) and seed yield per plant (g) were evaluated in M2 and M3 generations. Plant height showed a significant reduction in the populations treated with SA, whereas the mean days to flowering and maturity reduced significantly in EMS treatments in both M2 and M3 generations. For plant height, days to flowering and maturity, higher genetic variability was recorded in M2 generation as compared to M3, indicating that potential gain could be achieved through selection in early generation. Significant increase in fertile branches per plant, pods per plant, 100-seed weight (g) and seed yield per plant (g) was noticed among the mutants in M3 generation. Estimates of genotypic coefficient of variation, heritability and genetic advance for yield and yield associated components were recorded to be higher in M3 than in M2 generation. Seed protein of the mutants showed a slight but insignificant improvement over the control in M3 generation except at 0.04% SA, where it was marginally lower from that of the control. Seed yield per plant did not show any positive correlation with seed protein content, indicating the independent genetic control of these two traits. The concentrations of iron, manganese and zinc showed a slight increase with most of the mutagenic treatments in M3 generation. However, compared to control, their genetic parameters were increased with all the treatments. The high yielding mutants coupled with higher protein and mineral contents could minimize the risk of nutrient deficiency among the vast majority of the global inhabitants." @default.
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• W4239836277 date "2014-06-17" @default.
• W4239836277 modified "2023-10-18" @default.
• W4239836277 title "10. Selection for polygenic variability in early mutant generations of mungbean (<i>Vigna radiata</i>(L.) Wilczek)" @default.
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• W4239836277 doi "https://doi.org/10.3920/978-90-8686-796-7_10" @default.
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