Identification and Characterization of HS4-Mediated Hybrid Seed Shattering in Rice

文献类型： 外文期刊

第一作者： Wang, Daiqi

作者： Wang, Daiqi;Ruan, Ying;Liu, Chunlin;Wang, Daiqi;Liu, Chunlin;Wang, Daiqi;Xie, Wantong;Chen, Hong;Liu, Ziqiang;Wang, Daiqi;Xie, Wantong;Liu, Ziqiang;Yang, Tifeng

作者机构：

关键词： fine mapping; hybrid seed shattering; Oryza glaberrima; rice

期刊名称：AGRONOMY-BASEL （ 影响因子：3.3； 五年影响因子：3.7 ）

ISSN：

年卷期： 2024 年 14 卷 6 期

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收录情况： SCI

摘要： Seed shattering is an adaptive feature of seed dispersal in wild rice, and it is also an important agronomic trait affecting yield. Reduced seed shattering was a significant progress during rice domestication. However, the evolutionary pathway and molecular mechanism of hybrid seed shattering remain largely unknown. In order to gain a deeper understanding of the regulation of hybrid seed shattering, HS4, a locus conferring hybrid seed shattering between Oryza sativa and Oryza glaberrima, was identified and fine mapped to a 13.5-kb genomic region containing two putative genes during the development of chromosomal segment substitution lines (CSSLs). Expression analysis indicated that the hybrid seed shattering was not related to the expression of HS4. Preliminary research on the molecular mechanism of HS4-mediated hybrid seed shattering indicated that HS4(HJX74) and HS4(HP61) may form a multimer in heterozygotes, achieving the original function of a trihelix transcription factor through protein interaction. The identification and characterization of HS4 in this study not only provides new insights into the molecular mechanisms underlying hybrid seed shattering, but also provides a potential target for genome editing to reduce the difficulty of hybridization between the two species, facilitating hybrid breeding and increasing yield in rice.

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