1Department of Plant Breeding, Bidhan Chandra Krishi Viswavidyalaya, Nadia-741 252, (West Bengal), India
Regional Research Station, New Alluvial Zone, Sub-Centre Chakdaha, Bidhan Chandra Krishi Viswavidyalaya, Nadia-741 252, (West Bengal), India
*Email of corresponding author: awaneet.nikhil@gmail.com
Online published on 13 October, 2015.
A quantitative assessment using Mahalanobis D2 statistics for genetic diversity in 36 long duration aman rice grown under rainfed semi-deep situation at new alluvial zone of West Bengal with respect to twelve morphological characters revealed that the genotypes could be grouped into seven clusters. Cluster I with 25 genotypes was the largest, whilecluster VII was mono-genotypic. Cluster II, III, IV, V and VÉ had two genotypes each. The maximum inter-cluster distance was recorded between cluster II and VII. Cluster I revealed to be most heterogeneous. Grain yield plant−1 contributed maximum (35.39%) to the total divergence, followed by 1000-grain weight (33.49%) and grain length (17.61%). Hybridization among the genotypes, viz. Heymant, Murkibalam, Suranagra, Sungakalma and KGR belonging to widely divergent clusters are likely to produce heterotsis and wide variability in segregating generations.
Aman rice, D2, Genetic diversity, Grain yield, Intra cluster distance
