Exploring Genetic Variability Among Aromatic Rice (Oryza sativa L) Landraces in Odisha

Author: U. Keerthana, A.K. Senapati, Manas K. Bag, S.R. Prabhukarthikeyan, R. Naveen Kumar and Mihira K. Mishra

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Abstract

A total of 108 aromatic rice landraces were evaluated to assess genetic variability, broad-sense heritability, and genetic advance concerning yield and rice blast disease response. Across seasons, variations were noted in the estimated genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV). Generally, PCV values exceeded GCV values for the parameters studied. Notably, GCV was moderate for the number of tillers per plant and low for plant height, while grain yield per hill, 100 grain weight, and rice blast PDI showed high GCV values. Plant height exhibited moderate heritability alongside low genetic advance, whereas the number of tillers per plant, 100 grain weight, and rice blast PDI displayed high heritability coupled with high genetic advance. These observations provide valuable insights for breeding improved aromatic rice genotypes

Keywords

Aromatic rice, Landraces, Genetic variability, Heritability, yield

Conclusion

Higher heritability estimates suggest that these traits were relatively less influenced by environmental factors, indicating that their phenotypes accurately reflect genotypes and are therefore crucial for selecting superior genotypes based on phenotypic performance. Conversely, traits with lower heritability may benefit from pedigree, sib, or progeny tests for genetic improvement. The moderate heritability estimates for traits such as yield and plant height suggested a dominance of non-additive variance for yield in the studied material. Traits exhibiting high heritability along with high genetic advance indicated that additive gene action primarily governed their heritability. Similarly, traits with moderate to high heritability coupled with high to moderate genetic advance implied that additive gene action contributed to their heritability. This suggests that such traits could undergo further improvement through selective breeding in subsequent generations

References

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How to cite this article

U. Keerthana, A.K. Senapati, Manas K. Bag, S.R. Prabhukarthikeyan, R. Naveen Kumar and Mihira K. Mishra (2023). Exploring Genetic Variability Among Aromatic Rice (Oryza sativa L) Landraces in Odisha. Biological Forum – An International Journal, 15(1): 761-764