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

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

机构地区：[1]State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China/Triticeae Research Institute,Sichuan Agricultural University,Chengdu 611130,Sichuan,China [2]Dazhou Key Laboratory of Agricultural Resources Development and Ecological Conservation in Daba Mountain/Research Center of Sichuan Old Revolutionary Areas Development,Sichuan University of Arts and Science,Dazhou 635000,Sichuan,China [3]Industrial Crop Research Institute,Sichuan Academy of Agricultural Sciences,Chengdu 610300,Sichuan,China [4]School of Agriculture,Henan Institute of Science and Technology,Xinxiang 453003,Henan,China

出　　处：《The Crop Journal》2025年第2期480-489,共10页作物学报(英文版)

基　　金：supported by National Key Research and Development Program of China(2023YFD1201900);National Nat-ural Science Foundation of China(32472078,31971937);Natural Science Foundation of Sichuan Province(2024NSFSC0312);Crop Characteristic Resources Creation and Utilization Key Laboratory of Sichuan Province(myzdsys24-01);the Key Laboratory of Exploitation and Study of Distinctive Plants in Education Department of Sichuan Province(TSZW2023ZB-10).

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 high-confidence 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.

关 键 词：WHEAT Productive tiller number Grain yield Candidate genes 

分 类 号：S512.1[农业科学—作物学]