文献类型： 外文期刊
作者： Zhang, Xiangbo 1 ; Tang, Chaochen 1 ; Jiang, Bingzhi 1 ; Zhang, Rong 1 ; Li, Ming 2 ; Wu, Yaoyao 4 ; Yao, Zhufang 1 ; Huang, Lifei 1 ; Luo, Zhongxia 1 ; Zou, Hongda 1 ; Yang, Yiling 1 ; Wu, Minyi 5 ; Chen, Ao 5 ; Wu, Shan 7 ; Hou, Xingliang 5 ; Liu, Xu 5 ; Fei, Zhangjun 7 ; Fu, Junjie 9 ; Wang, Zhangying 1 ;
作者机构： 1.Guangdong Acad Agr Sci, Crops Res Inst, Key Lab Crop Genet Improvement Guangdong Prov, Guangzhou, Peoples R China
2.Chongqing Normal Univ, Coll Life Sci, Chongqing, Peoples R China
3.Sichuan Acad Agr Sci, Inst Biotechnol & Nucl Technol, Chengdu, Peoples R China
4.Nanjing Agr Univ, Coll Hort, Nanjing, Peoples R China
5.Chinese Acad Sci, Guangdong Prov Key Lab Appl Bot, Guangzhou, Peoples R China
6.Chinese Acad Sci, State Key Lab Plant Divers & Specialty Crops, South China Bot Garden, Guangzhou, Peoples R China
7.Cornell Univ, Boyce Thompson Inst, Ithaca, NY 14850 USA
8.Robert W Holley Ctr Agr & Hlth, USDA ARS, Ithaca, NY 14853 USA
9.Chinese Acad Agr Sci, Inst Crop Sci, State Key Lab Crop Gene Resources & Breeding, Beijing, Peoples R China
期刊名称：NATURE PLANTS （ 影响因子：13.6； 五年影响因子：17.0 ）
ISSN： 2055-026X
年卷期： 2025 年 11 卷 1 期
页码：
收录情况： SCI
摘要： Allele dosage plays a key role in the phenotypic variation of polyploids. Here we present a genome-wide variation map of hexaploid sweet potato that captures allele dosage information, constructed from deep sequencing of 294 hexaploid accessions. Genome-wide association studies identified quantitative trait loci with dosage effects on 23 agronomic traits. Our analyses reveal that sweet potato breeding has progressively increased the dosage of favourable alleles to enhance trait performance. Notably, the Mesoamerican gene pool has evolved towards higher dosages of favourable alleles at multiple loci, which have been increasingly introgressed into modern Chinese cultivars. We substantiated the breeding-driven dosage accumulation through transgenic validation of IbEXPA4, an expansin gene influencing tuberous root weight. In addition, we explored causative sequence variations that alter the expression of the Orange gene, which regulates flesh colour. Our findings illuminate the breeding history of sweet potato and establish a foundation for leveraging allele dosages in polyploid breeding practices.
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