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<p>Rice is an important staple food globally with a low protein profile. Proteins are the building blocks of the human body and they take an irreplaceable place in daily intake, their deficiency causes serious health hazards. Due to the low protein content in rice, people depend on other food sources for their protein needs. To improve protein content in rice biofortification is the best method. In the current study, 150 RILs of the F<sub>5</sub> generation of cross IG 29 (low protein) x <i>Mappillai</i> <i>Samba</i> (high protein) were evaluated for protein content through the BSA method using SSR markers. GPC showed moderate PCV and GCV, and high heritability and genetic advance as percent mean. Out of 314 markers used, 58 markers were found to be polymorphic between IG 29 and <i>Mappillai Samba</i>. Through SMA, RM1303, RM1364, and RM6544 were strongly associated with grain protein content with corresponding R<sup>2</sup> values of 0.28, 0.15, and 0.46 respectively. Functional annotation in the mapped regions reveals genes responsible for protein synthesis and transport. The identified SSR markers would be useful in developing protein-rich rice varieties using Marker Assisted Breeding programmes.</p>

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Marker-trait association for grain protein content in rice RIL population of IG 29 x Mappillai Samba through bulked segregant analysis

  • 期刊论文

  • 发表日期：

    2025年9月16日

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  • M. Kavipriya,
  • P. Jeyaprakash,
  • M. Akilan,
  • S. Rohit,
  • K. Sakthivel,
  • S. Rathika,
  • S. Geethanjali,
  • R. Pushpa,
  • M. Raveendran

摘要

Rice is an important staple food globally with a low protein profile. Proteins are the building blocks of the human body and they take an irreplaceable place in daily intake, their deficiency causes serious health hazards. Due to the low protein content in rice, people depend on other food sources for their protein needs. To improve protein content in rice biofortification is the best method. In the current study, 150 RILs of the F5 generation of cross IG 29 (low protein) x Mappillai Samba (high protein) were evaluated for protein content through the BSA method using SSR markers. GPC showed moderate PCV and GCV, and high heritability and genetic advance as percent mean. Out of 314 markers used, 58 markers were found to be polymorphic between IG 29 and Mappillai Samba. Through SMA, RM1303, RM1364, and RM6544 were strongly associated with grain protein content with corresponding R2 values of 0.28, 0.15, and 0.46 respectively. Functional annotation in the mapped regions reveals genes responsible for protein synthesis and transport. The identified SSR markers would be useful in developing protein-rich rice varieties using Marker Assisted Breeding programmes.