Author(s):

Partha Pratim Behera, SK Singh, DK Singh, YS Reddy, Sonali Habde, Amrut Khaire and Ashrutha MA

Abstract: Assessment of genetic diversity was made based on the data recorded for sixteen yield and yield contributing characters in twenty one rice genotypes using Mahalanobis’s D² statistics. By use of Tocher method twenty one genotypes were grouped into six clusters. Out of which Cluster I had eleven genotypes followed by Cluster II with five genotypes, Cluster VI with two genotypes and single genotype was included in cluster V, cluster III and Cluster IV respectively. The maximum intra-cluster distance was found in cluster VI (82.07) and the minimum was recorded for cluster I (35.37), while it was zero value for cluster III, IV and V as they had only single genotype each. The minimum inter-cluster D² values was recorded between cluster III and V (83.05) while the maximum D² value was found between cluster I and VI (485.23) followed by cluster IV and VI (379.12), cluster V and VI (349.78) and cluster III and cluster VI (338.24). The cluster I recorded high mean values significant for grain zinc content and 1000 grain weight whereas cluster II for days to first flowering, days to 50% flowering, days to maturity and spikelet per panicle. The cluster III recorded high mean values significant for spikelet per panicle, no of grains per panicles, spikelet fertility percent and grain weight per panicle. While cluster IV recorded high values significant for plant height, panicle length, spikelets per panicle, number of grain per panicle and grain weight per panicle. Whereas cluster V recorded high mean values significant for 1000 grain weight, grain weight per panicles, plant height and L/B ratio. The cluster VI had high mean value significant for days to first flowering, days to 50% flowering, days to maturity, no of filled grains per panicle, spikelet fertility percent, grain yield per plant, grain yield per plot, yield per ha., the crosses between BRRIdhan 62 x Swarna, BRRIdhan 62 x Sambamahsuri (cluster I x cluster VI) and BRRIdhan 64 x Swarna, BRRIdhan 64 x Sambamahsuri (cluster IV x cluster VI), IR 97443-11-2-1-1-1-1 –B x Swarna, IR 97443-11-2-1-1-1-1 –B x Sambamahsuri (cluster III x cluster VI), could be suggested for the exploitation of transgressive segregants for both yield and zinc biofortification.

Pages: 1319-1323  |  1091 Views  349 Downloads

Download (633KB)