~ 3112 ~ Journal of Pharmacognosy and Phytochemistry 2018; 7(4): 3112-3116 E-ISSN: 2278-4136 P-ISSN: 2349-8234 JPP 2018; 7(4): 3112-3116 Received: 21-05-2018 Accepted: 25-06-2018 Susant Sahu Department of Horticulture, Naini Agricultural Institute Sam Higginbottom University of Agriculture, Technology and Sciences, Allahabad, Utter Pradesh, India Vijay Bahadur Department of Horticulture, Naini Agricultural Institute Sam Higginbottom University of Agriculture, Technology and Sciences, Allahabad, Utter Pradesh, India Correspondence Susant Sahu Department of Horticulture, Naini Agricultural Institute Sam Higginbottom University of Agriculture, Technology and Sciences, Allahabad, Utter Pradesh, India Genetic analysis of dolichos bean ( Lablab purpureus L.) genotypes for horticultural traits Susant Sahu and Vijay Bahadur Abstract The present investigation was carried out to study the genetic variability, heritability and genetic advance for 18 traits in dolichos bean. The experimental material comprised of 40 genotypes of dolichos bean (Lablab purpureus L.). The highest value of genotypic coefficient of variation (33.99) and Phenotypic coefficient of variation (34.36) were recorded for Pod Weight (10 Pods). The highest heritability estimate was observed for The highest heritability was recorded for the characters 100 Seed Weight (98.89), Days to first Flowering (98.77), Green Pod Yield Per Plot (98.32), Days to 100% Flowering (98.28), Days to 50% flowering (98.13), Green Pod Yield Per Plot (98.13), Days to 100% flowering(98.28), Green Pod Yield Per plant (98.32), Pod Weight (10 Pods) (97.89), Inflorescence Length (97.35), and Days to First Green Pod Harvest (97.35), Vine Length (95.16), Green Pod Yield Per Hectare (93.33), Pod Length (93.86), Days to Last Green Pod Harvest (91.38), Pod Width (90.69), Seed Per pod (79.57), Pod Per Inflorescence (77.05), Flower Per inflorescence (71.58),. The highest genetic advance as percent of mean observed for Pod Weight (10 Pods) (69.28) while recorded lowest for Days to last green pod harvest (9.46). Hence selection will be effective for these traits. The divergence analysis revealed that the presence of appreciable amount of genetic diversity in the tested genotypes. Cluster IV had highest number of genotypes (13) followed by cluster II (10), cluster V (9), cluster I (6), cluster III, cluster VI and cluster VII, having 1 genotype. The maximum inter cluster distance was observed between cluster no. I and VI (2898.05) and cluster no. VI and VII (1569.61) showed minimum inter cluster distance. The highest intra cluster distance was recorded for cluster no. IV (845.17) and cluster no. 2 (345.56) showed minimum intra cluster distance. Keywords: genetic variability, heritability, genetic advance and genetic divergence Introduction Dolichos bean (Lablab purpureus L.) is an important leguminous vegetable crop grown throughout the country and distributed in Madhya Pradesh, Maharashtra, Andhra Pradesh, Tamil Nadu and North Eastern states. India is world’s largest producer of vegetables next to China with an annual production around 166.60 (million MT) from 9.57 (mha) of land with the productivity of 17.3 MT/ha. India is the center of diversity of dolichos bean and large number of indigenous strains are available in northern India. Although this crop has originated in India but very little work has been done for the genetic improvement of yield and quality. A great range of variation exits for the plant and pod characters amongst the accessions gro success of any breeding programme in general and improvement of specific trait through selection in particular, totally depends upon the genetic variability present in the available germplasm of a particular crop (Parmar et al. 2013) [6] . Since, many of the plant characters are governed by polygenes and great influenced by environmental conditions. The progress of breeding is, however, conditioned by the magnitude, nature and interrelationship of genotypic and non-genotypic variation. Among the quantitative characters, yield is a complex character, which is dependent on a number of yield contributing characters. Heritability of metric characters is a parameter of particular significance to the breeder, as it measures the degree of resemblance between the parent and the offspring and its magnitude indicates the heritability with which genotypes can be identified by its phenotypic expression, while genetic advance aids in exercising the necessary selection pressure. The knowledge of heritability and genetic advance guides the breeder to select superior parents to initiate an effective and fruitful crossing programme (Johnson et al., 1955) [3] . The assessment of variation provides us a correct picture of the extent of variation, further helping us to improve he genotypes.