Genetic Variability in Upland Rice (Oryza sativa L.) Genotypes of Nagaland

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Subrata Chakraborty
H. P. Chaturvedi

Abstract

Genetic variability and character association were studied in thirty local upland rice (Oryza sativa L.) genotypes for grain yield and its attributing characters. The analysis of variance revealed significant differences among the genotypes for all the characters studied indicating a high degree of variability in the material. The highest PCV and GCV were recorded for yield per plant, panicle weight, 1000-grain weight and effective tillers/plant indicating the presence of ample variation for these traits in the present material. In the present study high estimates of heritability and genetic advance were obtained for plant height at maturity, effective tillers per plant, 1000-grain weight, panicle weight, grains per panicle, and yield per plant. Thus, selection of these traits is likely to accumulate more additive genes leading to further improvement of their performance and these traits may be used as selection criteria in upland rice breeding program. The grain yield exhibited significant positive correlation with 1000-grain weight indicating relative utility of this trait for selection. 1000 grain weight exerted the maximum positive direct effect and exhibited significant positive correlation with yield indicating a true relationship among the traits.

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How to Cite
Chakraborty, S., & Chaturvedi, H. (2014). Genetic Variability in Upland Rice (Oryza sativa L.) Genotypes of Nagaland. Indian Research Journal of Genetics and Biotechnology, 6(02), 374-378. https://doi.org/.
Section
Review Article

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