Vol. 10, Issue 6 (2021)

Author(s):
Sourabh Gupta, Deepak Gauraha, Abhinav Sao and Prabha Rani Chaudhary

Abstract:
Rice gives a great wealth of material for genetical studies because of its wide ecological distribution and enormous discrepancies encountered for multitudinous morphological and physiological characteristic. The rice germplasm provide with ample of genetic diversity and a treasury of valuable genes. It is a rich pool of important genes that plant breeders can exploit for crop improvement. In present investigation, forty six exotic rice germplasm along with four checks were evaluated to estimate the genetic variability parameters in yield and yield contributing characters during Kharif 2019. Analysis of variance indicated the existence of significant genotypic differences among the genotypes for the yield, its components for all the characters. High GCV and PCV values were observed for characters viz., biological yield, harvest index, grain yield per plant, effective tillers per plant and 1000 seed weight. High heritability coupled with high genetic advance as per cent of mean was observed for biological yield followed by harvest index, grain yield per plant, effective tillers per plant, days to 50 percent flowering and number of filled grains per panicle which indicated that these traits were controlled by additive type of gene action. It is concluded that variation exists in the germplasm, which provides opportunities for this collection to be useful for genetic improvement.