Open AccessAssessment of Genetic Diversity among Indian and Exotic Genotypes of Brassica juncea using Phenotypic Evaluation
Author(s) -
Vivek K. Singh,
Ram Avtar,
Mahavir,
Nisha Kumari,
Manjeet,
Rohit Kumar
Publication year - 2020
Publication title -
indian journal of agricultural research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.241
H-Index - 8
eISSN - 0976-058X
pISSN - 0367-8245
DOI - 10.18805/ijare.a-5502
Subject(s) - brassica , germplasm , genetic diversity , rapeseed , forensic science , biology , crop , genotype , veterinary medicine , cultivar , microbiology and biotechnology , horticulture , agronomy , genetics , medicine , population , environmental health , gene
Background: Rapeseed-mustard is one of the most important oilseed crops in India, however, its genetic diversity is barely known. A better understanding on this topic is essential for the proper utilization of genotypes in crop improvement. Methods: Present study was carried out to determine the genetic diversity among 95 diverse genotypes of Brassica juncea (L.) in paired rows of 4 m length with a spacing of 30 x 10-15 cm (row × plant). Data were recorded on 11 different agro-morphological characters. Result: All the 95 genotypes were grouped into five distinct clusters based on Manhattan dissimilarity coefficients. Amongst the five clusters, cluster V and IV had the maximum number of genotypes (35 and 23 genotypes respectively) and cluster II with least number of genotypes (three). The Manhattan dissimilarity coefficients ranged from 0.741 to 8.299. Based on the genetic dissimilarity matrix, the maximum dissimilarity (8.299) was observed between the genotypes, DRMRIJ-15-133 and M 62. Cluster III recorded for medium plant height with medium early maturity and cluster I, had maximum mean values for most of the agro-morphological traits. The present work indicated the presence of high genetic diversity among genotypes, which can be used in future breeding programmes for developing mustard cultivars and germplasm management purposes.