Studies on hydrazine hydrate and gamma rays induced mutations affecting quantitative characters in mung bean phaseolus aureus

Khan, I.A.

Genetica Iberica 37(1-2): 47-58


ISSN/ISBN: 0016-6693
Accession: 006508137

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The effect of hydrazine hydrate (HZ) at 0.04% concentration and gamma rays at 20 kR and their combination treatments on three quantitative attributes has been assessed in the two varieties (G-65 and PS-16) of mung bean. Data were recorded on pod length, seeds per pod and 100-seed weight in the M2 generation. There was a significant increase (P .gtoreq. 0.01) in the mean pod length and seeds per pod after treatment with 20 kR of gamma rays in both the varieties. The combination treatment increased significantly one more seed over the control mean in the var. Ps-16. The mean 100-seed weight showed slight improvement in the treated populations for both the varieties. The coefficient of genotypic and phenotypic variability enhanced for all these three characters. But the magnitude of variability was different in the two varieties. The values of heritability and genetic advance increased and differed trait to trait. The estimates of heritability were higher in pod length followed by 100-seed weight and seeds per pod in the var. G-65. But the other var. PS-16 showed highest values of heritability in seeds per pod followed by pod length and 100-seed weight. Increased variability in these traits indicates the further improvement of these varieties.