INTERSPECIFIC HYBRIDIZATION IN BOTH DIRECTION OF VIGNA RADIATA X VIGNA MUNGO VAR. SILVESTRIS

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. mungo var. silvestris. In direct and reciprocal crosses the pod set percentages were recorded 15.65 and 11.42 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 78 percentages in Vigna mungo var. silvestris. The direct and reciprocal cross of V.radiata x V.mungo var silvestris and V.mungo var. sivestris x V.radiata were recorded 46 and 36.36 respectively. The hybrid leathality percentage of 65.21 recorded in V.radiata x V.mungo var silvestris where as V.rmungo var silvestrisx V.radiata was 62.50. The hybrid break down percentage was 34.79 recorded in V.radiata x V.rmungo var silvestris while in reciprocal cross of 37.50 percent recorded in the cross V.mungo var. sivestris x V.radiata The Number of seedlings attained maturity in the parents 65 in V.radiata and 38 in V. mungo var. sivestris and the same character for the both direct and reciprocal crosses of 15 and 5 percent in V.radiata x V.mungo var.silvestris and V.mungo var.silvestris x V. radiata respectively. The pollen fertility percentage of parent V. radiata was 90.55 and 85.0 percent in V.mungo var. silvestris and F1 hybrids of V. radiata x V.mungo var. silvestris was 65.0 and V mungo var. silvestris x V. radiata recorded 32.0 percent. For quantitative traits the mean performance for almost all the traits like plant height, number of branches per plant, days to fifty percent flowering, length of branch, number of clusters per branch, number of clusters per plant, number of pods per plant,pod length, number of seeds per pod, hundred seed weight, dry matter production and seed yield exhibited high per se performance in the direct cross V. radiata x V. mungo var silvestris like parent Vigna radiata except days to full maturity. For all the traits in the cross of Vigna radiata x Vigan mungo var silvestris the skewness was positive indicating that predominance of dominant alleles.