Character Association and Path Coefficient Analysis in Selected Genotypes of Rice (Oryza sativa L.)

Author: Sourav Paramanik, M. Subba Rao, Shampa Purkaystha and Ashok Singamsetti

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Abstract

To develop new paddy varieties suitable for Odisha state, it is required to standardise the selection criteria. Yield is a crucial trait that receives significant attention in every breeding program. To uncover the factors influencing yield and their effects, an experiment involving 50 rice genotypes was conducted and both correlation and path coefficients were analysed for 15 morphological traits and yield components on grain yield. Out of these characters studied 11 characters viz., days to 50% flowering, days to maturity, plant height, number of productive tillers plant-1, panicle length, test weight, straw yield plant-1, grain length, grain breadth, biological yield plant-1 and harvest index showed highly significant and positive correlation with grain yield both at genotypic and phenotypic level. Days to maturity and harvest index exhibited high positive direct effect on grain yield, both at genotypic and phenotypic levels. In addition, straw yield plant-1, biological yield plant-1, grain breadth and grain L/B ratio also recorded high positive direct effect at genotypic level. Hence, selection based on days to maturity, harvest index, straw yield plant-1, biological yield plant-1, grain breadth and grain L/B ratio could result in bringing simultaneous improvement of grain yield in further breeding programs.

Keywords

Rice, Grain yield, Yield components, Character association, Path analysis

Conclusion

The correlation coefficients and direct effects of the traits related to grain yield indicated that there are strong positive direct effects and highly significant positive associations between grain yield and the following traits viz., days to maturity, harvest index, straw yield and biological yield. These findings suggest that for improvement of rice grain yield, selection should be focused on the above mentioned characteristics to achieve higher grain yields. From the results obtained from the present study, it can be concluded that selection for intermediate to long duration genotypes with higher straw yield, biological yield, grain breadth, grain L/B ratio and semi dwarf to intermediate plant height will be useful for obtaining higher grain yield in rice crop during kharif season.

References

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How to cite this article

Sourav Paramanik, M. Subba Rao, Shampa Purkaystha and Ashok Singamsetti (2023). Character Association and Path Coefficient Analysis in Selected Genotypes of Rice (Oryza sativa L.). Biological Forum – An International Journal, 15(10): 902-911.