VARIABILITY AND INTERRELATIONSHIP AMONG VARIOUS TRAITS OF AROMATIC RICE LAND RACES

Abstract

The experiment was conducted at the experimental field of Sher-E-Bangla Agricultural University. Dhalca with 30 aromatic rice land races to study thegenetic varibility, diversity and association of correlation during June 2014 to February 2015. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Analysis of variance revealed significant diliërenccs among the genotypes t or all the characters studied. Highest grain yield was observed by the thirty genotypes (G I to 030) followed by 08 and G29. High estimates of GCV and PCV were observed in flag leaf length, secondary branches per panicle, filled grain per paniele, total grain per panicle, thousand grain weight and grain yield per plant. High heritability along with high GA as percent of mean was observed in flag leaf length, secondary branches per panicle, filled grain per panicle, total grain per panicle, thousand grain weight and grain yield per plant.The genotypes were grouped into five clusters.In (figure 9) Cluster IV contained the highest 10 genotypes and the cluster V contained the lowest (1). The highest imer-cluster distance was observed between clusters I and IV (table 10) indicating genotypes from these two clusters are diverse, if involved in hybridization might produce a wide spectrum of segregating population while the lowest inter-cluster distance was observed between cluster 11 and lIT.Correlation coefficients among the characters were studied to determine the association between yield and yield components. The significant positive correlations of grain yield per plant were found with effective tillers per hill, filled grain per panicle, total grains per panicle and thousand grain weight in both genotypic and phenotypic level suggesting that genotypes with high partitioning efficiency gave increase in grain yield per plant.Path coefficient analysis revealed that filled grain per paniele, thousand grain weight, secondary branches per panicle. panicle length andelurn length had the greatest direct contribution on grain yield.Considering group distance and other agronomic performance genotypes 021, G30, (127. GIl, 07, 05, 010 and 012 could be used as open pollinated aromatic rice varities and could be used as parents in future hybridization program.