INTERSPECIFIC HYBRIDIZATION IN BOTH DIRECTION OF VIGNA RADIATA X VIGNA RADIATA VAR. SUBLOBATA

An objective to develop superior segregants for yield components coupled with pest and disease resistance, the interspecific hybridization was attempted between mungbean (V. radiata) and V. radiata var. sublobata. In direct and reciprocal crosses the pod set percentages were recorded 28.71 and 16.88 respectively. The observation for parents and both direct and reciprocal cross combinations were recorded. The germination percentage of 98 was recorded in parent Vigna radiata and 85 percentage in Vigna radiata var. sublobata. The direct and reciprocal cross V.radiata x V.radiata var sublobata and V.radiata var sublobata x V.radiata were recorded 64 and 44 respectively. The hybrid leathality percentage of 81.25 recorded in V.radiata x V.radiata var sublobata where as V.radiata var sublobata x V.radiata was 68.18. The hybrid break down percentage was 18.74 recorded in V.radiaa x V.radiata var sublobata while in reciprocal cross of 31.82 percent recorded in the cross V.radiata var sublobata x V.radiata. The Number of seedlings attained maturity in the parents 65 in V.radiata and 46 in V. radiata var. sublobata and the same character for the both direct and reciprocal crosses of 25 and 15 percent in V.radiata x V.radiata var. sublobata and V. radiata var. sublobata x v. radiata respectively. The pollen fertility percentage of parent V. radiata was 90.55 and 91.26 percent in V. radiata var. sublobata and F1 hybrids of interspecific crosses for V. radiata x V. radiata var. sublobata was 78.26 and V. radiata var. sublobata x V. radiata recorded 65.26 percent.