Genetic variability Studies in Rice (Oryza sativa L.) varieties for Three Seasons under Saline conditions of Annamalai Nagar, an East Coast Region of Tamil Nadu

Author: S.R. Sruthi, Laleeth Kumar N., Y. Anbuselvam, J.L. Joshi and Johnny Subakar Ivin

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Abstract

The current study was conducted on 50 rice genotypes to evaluate the mean performance and genetic variability of various biometrical traits viz., fifty percent flowering, plant height, panicle length, number of tillers per panicle, number of productive tillers per plant, number of grains per panicle, 100 grain weight with grain yield per plant for three seasons under saline environment. Vandana disclosed significant mean values for productive tillers, grains per panicle and grain yield per plant while CTH-1 exhibited high per se performance for number of tillers per plant, number of productive tillers per plant, number of grains per panicle and grain yield per plant in pooled over environment. The consistent performance of CTH-1 makes it suitable for breeding programs to improve grain yield under saline conditions. Understanding the roles of genetic variability and heritable components are critical for progressive breeding program. The trait days to fifty percent flowering exhibited low PCV and GCV disclosing the presence of low level of variability while the traits viz., total number of tillers per plant, number of grains per panicle and grain yield per plant laid out moderate PCV and GCV revealing the existence of moderate level of variability in all the three seasons. The traits such as total number of tillers per plant, number of productive tillers per plant and panicle length demonstrated high heritability and genetic advance in all the three seasons

Keywords

Variability, Rice, Heritability, Genetic advance, Phenotypic coefficient of variation, Genotypic coefficient of variation

Conclusion

Due to the consistent per se performance of CTH-1 for number of tillers per plant, number of productive tillers per plant, number of grains per panicle and grain yield per plant in pooled over environment, it could be concluded that CTH-1 is suitable for breeding programs to improve grain yield under saline conditions. The traits viz., total number of tillers per plant, number of grains per panicle and grain yield per plant laid out moderate PCV and GCV revealing the existence of moderate level of variability in all the three seasons. The traits such as total number of tillers per plant, number of productive tillers per plant and panicle length demonstrated high heritability and genetic advance in all the three seasons which proved that selection of such traits would be effective as heritability was due to additive gene effects.

References

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How to cite this article

S.R. Sruthi, Laleeth Kumar N., Y. Anbuselvam, J.L. Joshi and Johnny Subakar Ivin (2023). Genetic variability Studies in Rice (Oryza sativa L.) varieties for Three Seasons under Saline conditions of Annamalai Nagar, an East Coast Region of Tamil Nadu. Biological Forum – An International Journal, 15(9): 528-535.