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BOMMAKA RUPESH KUMAR REDDY, BANDELA RAMANA MURTHY AND LAKSHMINARAYANA R. VEMIREDDY
Department of Genetics and Plant Breeding, S.V. Agricultural College, ANGRAU, Tirupati-517 502.
A study was conducted involving 40 rice genotypes for genetic variability of yield, yield attributes and early seedling
vigour related traits under dry Direct Seeded Rice (DSR) conditions. The analysis of variance revealed significant differences for all the characters studied indicating the presence of considerable amount of variability among the genotypes. Phenotypic coefficient of variation was slightly higher than the corresponding genotypic coefficient of variation for all the traits under study. The characters viz., number of chaffy grains panicle-1, 1000-grain weight, grain yield plant-1, number of filled grains panicle-1 and seedling vigour index – II recorded high PCV, GCV, heritability (broad sense) and genetic advance as per cent of mean indicating that these characters were governed by additive gene action and simple selection would be more rewarding for their improvement.
KEYWORDS: Rice, dry DSR, heritability, genetic advance as per cent of mean, coefficient of variation.