Assessment of Genetic variability in Segregating Generations of Rice (Oryza sativa L.) under Saline Soil conditions

Author: S. Reshma, K. Sumalini, G. Shiva Prasad and D. Srinivas Chary

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Abstract

Rice holds a crucial position in Indian agriculture and is cultivated in a wide range of environments and affected by various abiotic stresses such as salinity, alkalinity, drought, and cold. This research aims to explore the genetic diversity and potential adaptations of rice varieties to saline soil, which is critical for developing improved cultivars with enhanced salt tolerance. Two F2 populations i.e., KPS-10642 × RNR-11718 (cross 1) and KPS-10642 × CSR-27(cross 2) were evaluated at ARS, Kampasagar during rabi 2021-22 to assess the extent and nature of variability, heritability, and genetic advancement in rice for grain yield and its components under saline soil conditions. Sufficient amount of variation was observed in the two F2 segregating populations for yield and its components. Number of tillers per plant, number of productive tillers per plant in cross 1, and number of filled grains per panicle and sterility percentage in both the crosses expressed high GCV and PCV indicating high level of variability. Furthermore, traits viz., number of filled grains per panicle and sterility percentage in both the crosses and grain yield per plant in cross 1 exhibited high values of heritability and genetic advance as a per cent of mean indicating the role of additive gene action in governing these traits and effectiveness of simple selection. Consequently, these specific traits that contribute to grain yield under saline soil conditions hold promise for future utilization in rice breeding programs.

Keywords

Rice, genetic variability, heritability, genetic advance, salinity

Conclusion

From the present study, it was revealed that there was an ample amount of genetic variability in the two F2 populations for the traits viz., number of filled grains per panicle, sterility percentage and grain yield per plant with high heritability coupled with genetic advance as per cent of mean and are the important yield influencing traits in specific crosses of rice under saline soil conditions. Hence, selection of these traits could enhance the grain yield in rice under such conditions. Therefore, it would be advantageous to prioritize these traits when designing crop improvement programs.

References

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How to cite this article

S. Reshma, K. Sumalini, G. Shiva Prasad and D. Srinivas Chary (2023). Assessment of Genetic variability in Segregating Generations of Rice (Oryza sativa L.) under Saline Soil conditions. Biological Forum – An International Journal, 15(6): 474-479.