文献类型： 外文期刊

作者： Liu, Zehou ¹ ; Yang, Fan ² ; Wan, Hongshen ¹ ; Deng, Cao ³ ; Hu, Wenjing ⁵ ; Fan, Xing ⁶ ; Wang, Jirui ⁶ ; Yang, Manyu ¹ ; Feng, Junyan ² ; Wang, Qin ¹ ; Yang, Ning ¹ ; Cai, Li ⁶ ; Liu, Ying ⁶ ; Tang, Hao ¹ ; Li, Shizhao ¹ ; Luo, Jiangtao ¹ ; Zheng, Jianmin ¹ ; Wu, Ling ¹ ; Yang, Ennian ¹ ; Pu, Zongjun ¹ ; Jia, Jizeng ⁷ ; Li, Jun ¹ ; Yang, Wuyun ¹ ;

作者机构： 1.Sichuan Acad Agr Sci, Environm Friendly Crop Germplasm Innovat & Genet I, Key Lab Tianfu Seed Ind Innovat, Crop Res Inst,Key Lab Wheat Biol & Genet Improveme, Chengdu, Peoples R China

2.Sichuan Acad Agr Sci, Biotechnol & Nucl Technol Res Inst, Chengdu, Peoples R China

3.Sichuan Agr Univ, Coll Vet Med, Key Lab Anim Dis & Human Hlth Sichuan Prov, Chengdu, Peoples R China

4.DNA Stories Bioinformat Ctr, Dept Bioinformat, Chengdu, Peoples R China

5.Lixiahe Inst Agr Sci, Yangzhou, Jiangsu, Peoples R China

6.Sichuan Agr Univ, Triticeae Res Inst, Chengdu, Peoples R China

7.Chinese Acad Agr Sci CAAS, Inst Crop Sci, Beijing, Peoples R China

关键词： Aegilops ventricosa; 6NvL/2AS translocation; pangenome; introgression; wheat improvement

期刊名称：PLANT COMMUNICATIONS （ 影响因子：11.6； 五年影响因子：11.8 ）

ISSN： 2590-3462

年卷期： 2025 年 6 卷 1 期

页码：

收录情况： SCI

摘要： The allotetraploid wild grass Aegilops ventricosa (2n = 4x = 28, genome DvDvNvNv) has been recognized as an important germplasm resource for wheat improvement owing to its ability to tolerate biotic stresses. In particular, the 2NvS segment from Ae. ventricosa, as a stable and effective resistance source, has contributed greatly to wheat improvement. The 2NvS/2AS translocation is a prevalent chromosomal translocation between common wheat and wild relatives, ranking just behind the 1B/1R translocation in importance for modern wheat breeding. Here, we assembled a high-quality chromosome-level reference genome of Ae. ventricosa RM271 with a total length of 8.67 Gb. Phylogenomic analyses revealed that the progenitor of the Dv subgenome of Ae. ventricosa is Ae. tauschii ssp. tauschii (genome DD); by contrast, the progenitor of the D subgenome of bread wheat (Triticum aestivum L.) is Ae. tauschii ssp. strangulata (genome DD). The oldest polyploidization time of Ae. ventricosa occurred '0.7 mya. The Dv subgenome of Ae. ventricosa is less conserved than the D subgenome of bread wheat. Construction of a graph-based pangenome of 2AS/6NvL (originally known as 2NvS) segments from Ae. ventricosa and other genomes in the Triticeae enabled us to identify candidate resistance genes sourced from Ae. ventricosa. We identified 12 nonredundant introgressed segments from the Dv and Nv subgenomes using a large winter wheat collection representing the full diversity of the European wheat genetic pool, and 29.40% of European wheat varieties inherit at least one of these segments. The high-quality RM271 reference genome will provide a basis for cloning key genes, including the Yr17-Lr37-Sr38-Cre5 resistance gene cluster in Ae. ventricosa, and facilitate the full use of elite wild genetic resources to accelerate wheat improvement.