Diversity analysis of indica rice (oryza sativa l.) genotypes against low and high temperature stress

Abstract

Morphological characterization of 470 rice (Oryza sativa L.) accessions including five checks collected from different regions country were assessed using 19 quantitative characters traits. Accessions were evaluated in a field experiment in an augmented experimental design. The aim of the research was to study variations and to select lines that could be used as potential parents in future breeding programs. A principal components plot and distance between genotypes in different cluster groups were used to group the accessions. The rice genotypesgrouped into divergent cluster 12 and 18 are expected to give promising and desirable recombinants in the segregating generations. Also, traits contributing maximum to genetic divergence viz. Seed vigor followed by Fertile Grains/ Panicle, Fertile Grains/ Panicle and panicle length may be utilized in selecting genetically diverse parents.