SELECTION OF MUSTARD GENOTYPES FOR DROUGHT TOLERANCE BREEDING BASED ON DIVERSITY FOR BIOMETRICAL TRAITSSapana Baviskar, Shanti Patil and Sneha Patil
Thirteen genotypes belonging to five species Brassica rapa, Brassica juncea, Brassica carinata, Brassica napus and Eureca sativa were evaluated to study the diversity among the genotypes and to identify the desirable and potential parent in mustard breeding programme for drought tolerance during the year 2008-09 at College of Agriculture Nagpur. The analysis of variance and analysis of dispersion revealed highly significant differences among the genotypes for the traits studied viz. days to 50% flowering, days to maturity, plant height, number of primary branches, number of silique per plant, 1000 seed weight and seed yield per plant. Thirteen genotypes grouped into five clusters by D2 analysis. The maximum intercluster distance was recorded between cluster IV and cluster III. The canonical analysis indicated the importance of character like number of silique, days to maturity, days to 50% flowering and seed yield per plant towards the source of variation. Drought tolerant genotype RTM-314 and T-27 deviated from all other genotypes on the basis of genetic markers uniqueness for drought tolerance as compare to other genotypes.The results of the study lead to conclusion that the cultivated genotype ACN-9 and Pusa Bold of Brassica juncea can be further improved for earliness by crossing with Ragini and Bhavani (Brassica rapa) and by crossing with RTM-314 and T-27 (Eureca sativa) for drought tolerance.
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