An attempt was made to study blackgram germplasm with an objective to develop genetically diverse genotypes accompanied with high heritable components of yield contributing traits. The experimental material comprised of 21 blackgram
genotypes, was examined during kharif 2015 and 2016. Experimental study conducted during kharif 2015, was mainly relied on selection of transgressive segregants, which were further analyzed in Compact Family Block Design during kharif 2016. The
results depicted that families and progenies within families were significantly different for majority of the traits and found to be highly variable for biological yield, harvest index and seed yield. High heritability coupled with high genetic
advance were recorded for plant height (74.15%, 33.12%), branches per plant (84.34%, 40.55%), biological yield (83.51%, 69.11%) and seed yield (84.50%, 66.11%). Thus, the present findings could be beneficial to develop superior genotypes through
selection in blackgram breeding program.
Genetic variability is the pre-requisite for the initiation of any improvement programme for the identification and selection of superior entries over the existing cultivars. The investigation was conducted in 47 genotypes maintained at mulberry germplasm block at CSB-Central Sericultural Research and Training Institute (CSRandTI), Pampore for 13 agro-morphological traits to understand the available genetic variability for future improvement in mulberry. Analysis of variance (ANOVA) showed highly significant differences (P=0.01) between the genotypes for the agro-morphological traits studied. High level of phenotypic and genotypic coefficient of variation (>20%) observed for petiole length, petiole weight, leaf length, leaf width, number of leaf attached on main shoot, number of nodes on main shoot, total shoot length, leaf weight of main shoot, main shoot weight, total shoot weight per plant and total leaf weight or leaf yield indicated that these traits are governed by genetic factors. High heritability estimates coupled with high genetic advance as per cent of mean (GAM) for indicated additive gene action and improvement can be made through selection. Correlation coefficient association analysis revealed significant and positive correlation of leaf yield with yield components. The study revealed importance of direct selection for the improvement of agro-morphological traits.
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