Variability, Heritability and Diversity Analysis for Some Morphological Traits in Basmati Rice (Oryza sativa L.) Genotypes

Abstract

The present study was conducted at the research farm of Bangladesh Rice Research Institute (BRRI), Gazipur, during July to December (T. Aman season) 2016 to identify potential genotypes and suitable traits of Basmati rice (Oryza sativa L.) germplasm for breeding programs. Twenty-six genotypes were evaluated in a randomized complete block design with three replications. All genotypes exhibited a wide and significant variation for 13 morphological traits. Genotypic and Phenotypic co-efficient of variation were the highest for number of filled grains per panicle and 1000-grain weight. Higher heritability was observed for flag leaf width, plant height, number of filled grains per panicle, 1000grain weight and yield per hill. Grain yield per hill was positively as well as significantly associated with number of filled grain per panicle and grain length. According to 2 cluster analysis, 26 test genotypes were grouped into 5 clusters. Cluster IV was the largest consisting of 8 genotypes. The first two principal components of 13 traits accounted for about 41.06% of the total variation and indicated a wide variation among the genotypes. The selected best traits were the number of filled grains/panicle and 1000grain weight which showed high heritability and high genetic advance. Therefore, these traits could be used as selection criteria for desired breeding materials. Moreover, the genotypes under cluster I, cluster II and cluster V might be selected for future hybridization programs.