Vol. 11, Issue 5 (2022)

Author(s):
M Akshay, B Satish Chandra, K Rukmini Devi and Y Hari

Abstract:
The studies on genetic variation and its understanding in cultivated rice (Oryza sativa L.) can help in improving the crop yield. The present investigation was undertaken with forty-four rice genotypes to study the variability and genetic parameters for yield and its components, quality and nutritional traits. The investigation revealed that the estimates of GCV for all the characters studied were slightly less than PCV estimates indicating influence of environment on the genotype performance. The traits plant height, number of productive tillers per plant, panicle length, number of grains per panicle, 1000 grain weight, grain yield per plant, head rice recovery percentage, grain length, grain width, length/breadth ratio, protein content, iron and zinc content all showed moderate to high variability, high heritability coupled with high genetic advance as per cent of mean revealing the role of additive gene effect and simple selection procedures may be effective for improving these traits. Low PCV and GCV were recorded for the traits viz., days to 50% flowering, hulling percentage and milling percentage. High heritability coupled with moderate genetic advance as per cent of mean was observed for days to 50% flowering, hulling percentage and milling percentage indicating that role of both additive and non-additive gene effects in the inheritance of these traits.