Genetic variability, heritability and genetic advance of yield and lodging-related traits in rice (Oryza sativa L.)

Abstract

This study was conducted to determine the PCV and GCV, heritability (bs) and genetic gain in lodging resistance and lodging-related traits among selected high yielding rice varieties of Kerala. Results revealed the presence of large genotypic differences in yield, lodging and related traits and difference between PCV and GCV among all the selected genotypes. Both PCV and GCV were highest for seed yield per plant followed by panicle weight and tillers plant-1. Heritability was high and ranged from (99.81 %) potassium content to (91.43 %) panicle weight. The genetic advance as per cent of mean estimates was high for all the traits and highest for lodging per cent (84.83 %). The high estimates of genetic advance indicating that, the selection for characters viz., internodal length, culm wall thickness, lodging perc ent, seed yield per plant, silicon and potassium content will be effective for further improving overall lodging resistance.

Keywords

• lodging resistance
• internode length
• rice
• genotypic coefficient of variation (gcv)
• phenotypic coefficient of variation (pcv)
• heritability and genetic advance