文献类型： 外文期刊

作者： Sun, Mengjing ¹ ; Tong, Jingyang ¹ ; Dong, Yan ¹ ; Pu, Zongjun ³ ; Zheng, Jianmin ³ ; Zhang, Yelun ⁴ ; Zhang, Xueyong ¹ ; Hao, Chenyang ¹ ; Xu, Xiaowan ¹ ; Cao, Qiang ¹ ; Rasheed, Awais ¹ ; Ali, Mohamed Badry ⁷ ; Cao, Shuanghe ¹ ; Xia, Xianchun ¹ ; He, Zhonghu ¹ ; Ni, Zhongfu ² ; Hao, Yuanfeng ¹ ;

作者机构： 1.Chinese Acad Agr Sci CAAS, Inst Crop Sci, Natl Engn Res Ctr Crop Mol Breeding, State Key Lab Crop Gene Resources & Breeding, Beijing 100081, Peoples R China

2.China Agr Univ, Coll Agron, State Key Lab Crop Heterosis & Utilizat, Beijing 100094, Peoples R China

3.Sichuan Acad Agr Sci, Inst Crop Sci, Chengdu 610066, Peoples R China

4.Hebei Acad Agr & Forestry Sci, Inst Cereal & Oil Crops, Shijiazhuang 050031, Hebei, Peoples R China

5.Int Maize & Wheat Improvement Ctr CIMMYT China Off, CAAS, Beijing 100081, Peoples R China

6.Quaid i Azam Univ, Dept Plant Sci, Islamabad 45320, Pakistan

7.Assiut Univ, Fac Agr, Dept Agron, Assiut 71526, Egypt

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.4； 五年影响因子：5.7 ）

ISSN： 0040-5752

年卷期： 2024 年 137 卷 7 期

页码：

收录情况： SCI

摘要： Key messageThree stable QTL for grain zinc concentration were identified in wheat landrace Chinese Spring. Favorable alleles were more frequent in landraces than in modern wheat cultivars.AbstractWheat is a major source of dietary energy for the growing world population. Developing cultivars with enriched zinc and iron can potentially alleviate human micronutrient deficiency. In this study, a recombinant inbred line (RIL) population with 245 lines derived from cross Zhou 8425B/Chinese Spring was used to detect quantitative trait loci (QTL) for grain zinc concentration (GZnC) and grain iron concentration (GFeC) across four environments. Three stable QTL for GZnC with all favorable alleles from Chinese Spring were identified on chromosomes 3BL, 5AL, and 5BL. These QTL explaining maxima of 8.7%, 5.8%, and 7.1% of phenotypic variances were validated in 125 resequenced wheat accessions encompassing both landraces and modern cultivars using six kompetitive allele specific PCR (KASP) assays. The frequencies of favorable alleles for QGZnCzc.caas-3BL, QGZnCzc.caas-5AL and QGZnCzc.caas-5BL were higher in landraces (90.4%, 68.0%, and 100.0%, respectively) compared to modern cultivars (45.9%, 35.4%, and 40.9%), suggesting they were not selected in breeding programs. Candidate gene association studies on GZnC in the cultivar panel further delimited the QTL into 8.5 Mb, 4.1 Mb, and 47.8 Mb regions containing 46, 4, and 199 candidate genes, respectively. The 5BL QTL located in a region where recombination was suppressed. Two stable and three less stable QTL for GFeC with favorable alleles also from Chinese Spring were identified on chromosomes 4BS (Rht-B1a), 4DS (Rht-D1a), 1DS, 3AS, and 6DS. This study sheds light on the genetic basis of GZnC and GFeC in Chinese Spring and provides useful molecular markers for wheat biofortification.