文献类型： 外文期刊

作者： Yan, Lang ¹ ; Zhang, Yizheng ² ; Cai, Guangze ¹ ; Qing, Yuan ¹ ; Song, Jiling ³ ; Wang, Haiyan ² ; Tan, Xuemei ² ; Liu, Chunsheng ³ ; Yang, Mengping ³ ; Fang, Zhirong ¹ ; Lai, Xianjun ¹ ;

作者机构： 1.Xichang Univ, Panxi Crops Res & Utilizat Key Lab Sichuan Prov, Xichang 615000, Sichuan, Peoples R China

2.Sichuan Univ, Coll Life Sci, Sichuan Key Lab Mol Biol & Biotechnol, Chengdu 610065, Sichuan, Peoples R China

3.Heilongjiang Acad Agr Sci, Natl Potato Improvement Ctr, Keshan Branch, Keshan 161600, Heilongjiang, Peoples R China

关键词： Solanum stenotomum; primitive cultivated potato; genome assembly; comparative genome; genomic variations

期刊名称：G3-GENES GENOMES GENETICS （ 影响因子：3.542； 五年影响因子：3.545 ）

ISSN： 2160-1836

年卷期： 2021 年 11 卷 10 期

页码：

收录情况： SCI

摘要： Genetic diversity is the raw material for germplasm enhancement. Landraces and wild species relatives of potato, which contain a rich gene pool of valuable agronomic traits, can provide insights into the genetic diversity behind the adaptability of the common potato. The diploid plant, Solanum stenotomum (Sst), is believed to have an ancestral relationship with modern potato cultivars and be a potential source of resistance against disease. Sequencing of the Sst genome generated an assembly of 852.85Mb (N50 scaffold size, 3.7Mb). Pseudomolecule construction anchored 788.75Mb of the assembly onto 12 pseudochromosomes, with an anchor rate of 92.4%. Genome annotation yielded 41,914 high-confidence protein-coding gene models and comparative analyses with closely related Solanaceae species identified 358 Sst-specific gene families, 885 gene families with expansion along the Sst lineage, and 149 genes experiencing accelerated rates of protein sequence evolution in Sst, the functions of which were mainly associated with defense responses, particularly against bacterial and fungal infection. Insights into the Sst genome and the genomic variation of cultivated potato taxa are valuable in elaborating the impact of potato evolution in early landrace diploid and facilitate modern potato breeding.