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MODE OF INHERITANCE AND GENETIC VARIABILITYOF SOME OF THE TRAITS IN MUNGBEANVIGNA RADIATA (L.) WILCZEK

MUHAMMAD ZUBAIR¹, SAIF ULLAH AJMAL^2*, MUHAMMAD MUNIR²AND MUHAMMAD ANWAR¹

Abstract: Combining ability analysis was carried out in an 8x8 parent complete diallel of mungbean. Significant differences were observed for GCA and SCA among parents and hybrids for all the traits under study. Estimates of variances due to GCA and SCA suggested predominance of additive gene action for plant height, days to maturity, pod length and 100 seed weight. High SCA variance for pods per plant, seeds per pod and grain yield per plant showed the importance of non-additive gene action for these traits. For the improvement of grain yield in mungbean, crosses involving the parents, NM 121-25, NM 51, VC 3902 and VC 4152, need special consideration. The cross combination, NM 121-25 x VC 4152, was the best for high grain yield on the basis of SCA. The specific crosses, NM 51 x VC 4982, NM 20-21 x VC 1163 and NM 51 x VC 3902, revealed high number of pods coupled with high grain yield.

¹Pulses programme, National Agricultural Research Centre, Islamabad, Pakistan.

²Department of Plant Breeding and Genetics, University of Arid Agriculture, Rawalpindi, Pakistan.