Fine-mapping and candidate gene identification for QPtn.sau-4B showing potential in increasing productive tiller number and yield in wheat

文献类型： 外文期刊

第一作者： Liu, Jiajun

作者： Liu, Jiajun;Wang, Tongzhu;Lan, Yuxin;Zhang, Zhiyuan;Wu, Lei;Hu, Xinrong;Yin, Li;Liu, Yanlin;Tang, Huaping;Jiang, Qiantao;Xu, Qiang;Chen, Guoyue;Qi, Pengfei;Jiang, Yunfeng;Wei, Yuming;Zheng, Youliang;Ma, Jian;Liu, Jiajun;You, Jianing;Liu, Chunji

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关键词： Wheat; Productive tiller number; Grain yield; Candidate genes

期刊名称：CROP JOURNAL （ 影响因子：5.6； 五年影响因子：6.0 ）

ISSN： 2095-5421

年卷期： 2025 年 13 卷 2 期

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收录情况： SCI

摘要： Productive tiller number (PTN) is a pivotal trait that significantly influences wheat grain yield. To date, there have been limited reports on the cloning of genes that regulate PTN in wheat. The quantitative trait locus (QTL) QPtn.sau-4B, associated with PTN, was previously mapped between the markers KASP-1 and KASP-3 on the chromosome 4B. Here, utilizing 12 newly developed markers and phenotypic data of PTN from recombinants identified within this interval, QPtn.sau-4B was further fine-mapped to a 2.58 Mb interval on wheat chromosome arm 4BS. Within this interval, we identified 14 genes with highconfidence and 32 genes with low-confidence. A 0.17 Mb deletion fragment contained TraesCS4B03G0092600 and TraesCS4B03G0093100, which were assigned as candidate genes for QPtn. sau-4B. Additionally, QPtn.sau-4B had potential to enhance both PTN and grain yield in wheat. Cloning this locus would support the development of wheat cultivars with increased grain yield. (c) 2025 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NCND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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