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Natural variation of OsGluA2 is involved in grain protein content regulation in rice

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  • Yihao Yang

    (Yangzhou University
    Yangzhou University
    Yangzhou University)

  • Min Guo

    (Yangzhou University
    Yangzhou University
    Yangzhou University)

  • Shengyuan Sun

    (Yangzhou University
    Yangzhou University)

  • Yelu Zou

    (Yangzhou University)

  • Shuangyi Yin

    (Yangzhou University)

  • Yannan Liu

    (Yangzhou University)

  • Shuzhu Tang

    (Yangzhou University)

  • Minghong Gu

    (Yangzhou University
    Yangzhou University)

  • Zefeng Yang

    (Yangzhou University
    Yangzhou University)

  • Changjie Yan

    (Yangzhou University
    Yangzhou University
    Yangzhou University)

Abstract

Grain protein content (GPC) affects rice nutrition quality. Here, we identify two stable quantitative trait loci (QTLs), qGPC-1 and qGPC-10, controlling GPC in a mapping population derived from indica and japonica cultivars crossing. Map-based cloning reveals that OsGluA2, encoding a glutelin type-A2 precursor, is the candidate gene underlying qGPC-10. It functions as a positive regulator of GPC and has a pleiotropic effect on rice grain quality. One SNP located in OsGluA2 promoter region is associated with its transcript expression level and GPC diversity. Polymorphisms of this nucleotide can divide all haplotypes into low (OsGluA2LET) and high (OsGluA2HET) expression types. Population genetic and evolutionary analyses reveal that OsGluA2LET, mainly present in japonica accessions, originates from wild rice. However, OsGluA2HET, the dominant type in indica, is acquired through mutation of OsGluA2LET. Our results shed light on the understanding of natural variations of GPC between indica and japonica subspecies.

Suggested Citation

  • Yihao Yang & Min Guo & Shengyuan Sun & Yelu Zou & Shuangyi Yin & Yannan Liu & Shuzhu Tang & Minghong Gu & Zefeng Yang & Changjie Yan, 2019. "Natural variation of OsGluA2 is involved in grain protein content regulation in rice," Nature Communications, Nature, vol. 10(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-09919-y
    DOI: 10.1038/s41467-019-09919-y
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    Cited by:

    1. Yong Zhang & Pulin Kong & Fan Wang & Limei Zhao & Kaiyun Qian & Yadong Zhang & Xiaorong Fan, 2022. "Effects of Carbon and Nitrogen Fertilisers on Rice Quality of the OsNRT2.3b -Overexpressing Line," Agriculture, MDPI, vol. 12(6), pages 1-13, June.
    2. Yujia Leng & Lianmin Hong & Tao Tao & Qianqian Guo & Qingqing Yang & Mingqiu Zhang & Xinzhe Ren & Sukui Jin & Xiuling Cai & Jiping Gao, 2023. "Mapping of QTLs for Brown Rice Traits Based on Chromosome Segment Substitution Line in Rice ( Oryza sativa L.)," Agriculture, MDPI, vol. 13(5), pages 1-14, April.
    3. Huanhe Wei & Jialin Ge & Xubin Zhang & Wang Zhu & Yinglong Chen & Tianyao Meng & Qigen Dai, 2022. "Agronomic and Physicochemical Properties Facilitating the Synchronization of Grain Yield and the Overall Palatability of Japonica Rice in East China," Agriculture, MDPI, vol. 12(7), pages 1-17, July.
    4. Yeotae Yun & Gyucheol Kim & Giwon Cho & Youngju Lee & Tugsang Yun & Hakhun Kim, 2023. "Effect of Nitrogen Application Methods on Yield and Grain Quality of an Extremely Early Maturing Rice Variety," Agriculture, MDPI, vol. 13(4), pages 1-14, April.

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