Molecular marker based estimates of genetic distance and prediction of heterosis in rice (Oryza sativa)


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Authors

  • AMIT KUMAR Scientist, ICAR RC for NEH Region, Umiam 793 103, Meghalaya
  • VIKRAM JEET SINGH Senior Research Fellow, ICAR-Indian Agricultural Research Institute, Pusa, New Delhi 110 012, India
  • GOPALA KRISHNAN S ICAR-Indian Agricultural Research Institute, Pusa, New Delhi 110 012, India
  • PROLAY K BHOWMICK Scientist, ICAR-Indian Agricultural Research Institute, Pusa, New Delhi 110 012, India
  • K K VINOD Principal Scientist, ICAR-Indian Agricultural Research Institute, Pusa, New Delhi 110 012, India
  • RAKESH SETH Principal Scientist, Regional Station, Karnal 132 001
  • M NAGARAJAN Principal Scientist, Rice Breeding and Genetics Research Centre, Aduthurai 612 101, Tamil Nadu
  • R K ELLUR ICAR-Indian Agricultural Research Institute, Pusa, New Delhi 110 012, India
  • HARITHA BOLLINEDI ICAR-Indian Agricultural Research Institute, Pusa, New Delhi 110 012, India
  • ASHOK KUMAR SINGH 10Joint Director (Research) and Head, ICAR-Indian Agricultural Research Institute, Pusa, New Delhi 110 012, India

https://doi.org/10.56093/ijas.v90i8.105939

Keywords:

Correlation, Genetic distance, Heterosis, Prediction, Molecular markers, Rice

Abstract

The association of parental divergence based on simple sequence repeats (SSR) markers and heterosis in 96 rice (Oryza sativa L) hybrids was investigated for yield and component traits under four environments. Hybrids were derived from four cytoplasmic male sterile (CMS) lines and 24 iso-cytoplasmic restorers (ICR). The genetic distance (GD) and heterosis were significantly correlated for the number of productive tillers per plant (0.537) and panicle length (0.386) in Delhi under early sowing. Under late sowing, negative correlations were also observed (-0.435, -0.401) with pollen fertility percentage. The GD and heterotic performance of hybrids were significantly correlated for panicle length (r=0.35) and number of effective tillers per plant (r=0.51). At Karnal, significant association between GD and hybrid grain yield (0.615) was observed. Besides, insignificant correlations were observed for some other traits at different locations. The non-significant correlations indicated the need of employing trait related functional/ gene based markers as well as using more abundant markers for accurately predicting the hybrid performance.

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References

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2020-10-14

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2020-10-14

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How to Cite

KUMAR, A., SINGH, V. J., S, G. K., BHOWMICK, P. K., VINOD, K. K., SETH, R., NAGARAJAN, M., ELLUR, R. K., BOLLINEDI, H., & SINGH, A. K. (2020). Molecular marker based estimates of genetic distance and prediction of heterosis in rice (Oryza sativa). The Indian Journal of Agricultural Sciences, 90(8), 1439-1444. https://doi.org/10.56093/ijas.v90i8.105939
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