Elucidating Components of Genetic Variation for Yield and Yield Attributing Traits in Rice (Oryza sativa L.) Germplasm Lines

Author: Rahul Saini, Bupesh Kumar, Vikas Sharma, V.B. Singh and R.S. Sudan

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Abstract

Evolving high yielding cultivars is one of the prime objectives of breeding and such cultivars can be evolved by hybridizing dissimilar parents. Therefore, identification of such parents is the prerequisite and until and unless components of genetic variation are not worked out such parents cannot be identified. The present study was carried out during Kharif 2022 with an aim to elucidate components of genetic variation for yield and yield attributing traits in rice germplasm lines. The experiment was conducted at two locations viz., Experimental area of Division of Plant Breeding and Genetics and Regional Agriculture Research Station (RARS) Rajouri in which twenty-six rice germplasm lines were evaluated in Randomized Complete Block Design (RCBD) in three replications having a plot size of 5m2. Data on yield and yield attributing traits viz., number of days to 50 per cent flowering, plant height, total number of tillers per plant, number of effective tillers per plant, days to maturity, panicle length, 1000 grain weight and grain yield per plant were recorded following standard procedures and was statistically analysed using appropriate software. Analysis of variance revealed significant variation among the germplasm lines for all the traits studied indicating presence of sufficient variation in the experimental material. Estimates of components of genetic variation revealed that traits like days to 50 per cent flowering and plant height were found to have high heritability coupled with high genetic advance indicating the effectiveness of selection in improving these traits.

Keywords

Genetic variation, rice, heritability and genetic advance

Conclusion

The germplasm lines under present study were found to be distinct w.r.t agro-morphological, yield and yield attributing traits. Traits like Days to 50 percent and plant height showed high heritability with genetic advance estimates, which suggested additive gene may be present and selection might be effective and hence can be utilized in future breeding programmes.

References

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How to cite this article

Rahul Saini, Bupesh Kumar, Vikas Sharma, V.B. Singh and R.S. Sudan (2023). Elucidating Components of Genetic Variation for Yield and Yield Attributing Traits in Rice (Oryza sativa L.) Germplasm Lines. Biological Forum – An International Journal, 15(10): 1423-1427.