GENETIC VARIABILITY, CHARACTER ASSOCIATION AND PATH CO- EFFICIENT ANALYSIS IN RAINFED RICE, UNDER ALKALINE CONDITION

Abstract

Estimates of variability, heritability, genetic advance, correlation and path analysis were carried out for five characters (Oryza sativa L.) in rice with 15 salt tolerant genotypes under rainfed conditions. The highest genotypic coefficient of variation was observed for grain yield followed by harvest index, while it was the lowest for days to maturity. Days to 50 per cent flowering and days to maturity recorded high heritability and lowest for straw yield. Grain yield recorded high GCV, genetic advance and moderate heritability. Harvest index and straw yield were positively and significantly correlated with seed yield. Days to 50 per cent flowering recorded the highest positive direct effect on seed yield followed by harvest index. Harvest index recorded high positive and significant genotypic correlation co-efficient and direct positive effect on seed yield. The studies suggested that harvest index is important in the selection of superior genotypes of rice in rainfed condition.

DOI

https://doi.org/10.29321/MAJ.10.A00569

Pages

122 - 124

Creative Commons

Copyright

© The Author(s), 2025. Published by Madras Agricultural Students' Union in Madras Agricultural Journal (MAJ). This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited by the user.

Keywords