数字农科院2.0

Natural variation in HD10.1 promoter causing delayed heading date in rice

文献类型： 外文期刊

作者： Ruoju Yang;Ying Bian;Zhengjiu Zhang;Xiaobo Zhang;Junyi Gong;Jiongjiong Fan

作者机构：

关键词： HD10.1;Heading date;Promoter;Rice (Oryza sativa L.);Transcript expression level

期刊名称： Current Plant Biology

ISSN： 2214-6628

年卷期： 2025 年 41 卷

页码：

收录情况： ESCI（2025版）

摘要： Heading date is a critical agronomic trait in rice (Oryza sativa L.). Utilizing chromosome segment substitution lines (CSSLs) with the indica cultivar “Huanghuazhan” (HHZ) as the recipient parent and “Basmati Surkh 89–15” (BAS) as the donor parent, we identified a quantitative trait locus (QTL) regulating heading date, designated as HD10.1. In this study, we characterized a functionally defective allele of HD10.1BAS, a novel allele of Ehd1. The divergence in the promoter region between HD10.1BAS and HD10.1HHZ results in reduced transcriptional expression of HD10.1BAS in NIL-HD10.1BAS, leading to a delay in heading by approximately 10 days compared to NIL-HD10.1HHZ under long-day conditions. An insertion-deletion (InDel) within the HD10.1BAS promoter may be a key factor contributing to its decreased transcriptional activity. Moreover, our findings suggest that the introgression of HD10.1BAS into the HHZ cultivar exhibits potential for yield improvement. This study provides valuable genetic resources for molecular breeding strategies aimed at optimizing heading date while simultaneously enhancing yield in rice.

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