Mishra, S. B.Sinha, Sima2016-09-152016-09-152011http://krishikosh.egranth.ac.in/handle/1/76807The present investigation was conducted at Research Farm of Tirhut College of Agriculture, Dholi, Muzaffarpur, Bihar during 2009 - 2011. The experimental material comprising the sixty one genotypes including standard varieties (SML 668) involving three of each resistant as well as one of each susceptible variety of mung and urd beans to develop the six intra and four inter specific crosses comprising the P1, P2, F1, F2, BC1 and BC2 population were grown in RBD design with three replications in two sets of experiment including and excluding parent. Observations were recorded for thirteen quantitative traits including the yield. Significant differences among the genotypes for all the character in both sets of experiment were observed. On the basis of mean performance fourteen genotypes were found significantly superior than check SML 668 for phenol content, among them Uttara x LGG 450 was having the highest phenol content (2.03 mg/g of fresh leaf). For grain yield only one treatment HUM 16 x LGG 450 exhibited significant superior over the check variety SML 668. For all the characters PCV was slightly higher than GCV. High heritability coupled with high GA was observed for all the traits except pod per cluster, days to 50 per cent flowering and days to maturity. Grain yield exhibited positive and significant correlation with 100 seed weight and grains per pod alongwith their positive and high direct effects in both sets of the experiment. Based on the joint scaling test few intraspecific combinations showed the presence of epistasis; whereas in most of the interspecific crosses epistasis was observed. As per the three parameters model additive and/or dominant components seems to play an important role in the inheritance of most of the yield attributing traits in intra and interspecific crosses. As evident from the six parameter model, preponderance of significant reducing (-ve) additive gene effects in intraspecific crosses, whereas additive and dominance components were equally important in interspecific crosses for the expression of most of the yield attributing traits. Among epistatic interactions additive x additive gene effects for days to 50 per cent flowering and dominant x dominant gene effect for 100 seed weight in four intraspecific crosses, whereas in interspecific crosses all three types of epistatic interactions were observed for the expression of most of the yield attributing traits. In most of the intra as well as inter specific crosses duplicate type of epistasis was observed. For most of the yield attributing traits desirable heterosis was observed in intraspecific crosses TMB 37 x LGG 450 and Sekhar x Barabanki, whereas in interspecific cross PU 31 x LGG 450 were found promising. In Vigna the MYMV resistance is found digenic recessive in nature.enMungbeanYellow mosaic virusGeneticsGeneration meanThesis