Analysis of allohexaploid wheatgrass genome reveals its Y haplome origin in Triticeae and high-altitude adaptation
Phylogenetic origin of the Y haplome present in allopolyploid Triticeae species remains unknown. Here, we report the 10.47 Gb chromosome-scale genome of allohexaploid Elymus nutans (StStYYHH). Phylogenomic analyses reveal that the Y haplome is sister to the clade comprising V and Jv haplomes from Dasypyrum and Thinopyum. In addition, H haplome from the Hordeum-like ancestor, St haplome from the Pseudoroegneria-like ancestor and Y haplome are placed in the successively diverged clades. Resequencing data reveal the allopolyploid origins with St, Y, and H haplome combinations in Elymus. Population genomic analyses indicate that E. nutans has expanded from medium to high/low-altitude regions. Phenotype/environmental association analyses identify MAPKKK18 promoter mutations reducing its expression, aiding UV-B adaptation in high-altitude populations. These findings enhance understanding of allopolyploid evolution and aid in breeding forage and cereal crops through intergeneric hybridization within Triticeae.
Authors
- Ming Sun (ORCID: https://orcid.org/0000-0001-5465-5983)
- Yongzhi Yang (ORCID: https://orcid.org/0000-0001-6912-6718)
- Xiao Ma (ORCID: https://orcid.org/0000-0002-4491-3528)
- Jianquan Liu (ORCID: https://orcid.org/0000-0002-4237-7418)
- Shiqie Bai
- Chengzhi Jiang (ORCID: https://orcid.org/0000-0002-9196-9858)
- Yingjie Liu (ORCID: https://orcid.org/0000-0001-5400-2237)
- Zhaoting Wang
- Shuai Yuan
- Shangang Jia (ORCID: https://orcid.org/0000-0002-3306-7637)
- Zhenglin Yang (ORCID: https://orcid.org/0000-0003-4617-1422)
- Yi Xiong (ORCID: https://orcid.org/0000-0003-3086-0282)
- Zecheng Zhang (ORCID: https://orcid.org/0000-0001-9240-1829)
- Zhixiao Dong
- Qingqing Yu
- Peng Xue (ORCID: https://orcid.org/0000-0002-8150-3579)
- Guangrong Li (ORCID: https://orcid.org/0000-0002-8425-0212)
- Lina Sha (ORCID: https://orcid.org/0000-0001-5252-1252)
- Xing Fan (ORCID: https://orcid.org/0000-0003-4199-5369)
- Junming Zhao (ORCID: https://orcid.org/0000-0003-2096-4504)
- Xiong Lei
- Daxu Li
- Jinghan Peng (ORCID: https://orcid.org/0000-0002-5680-2729)
- Jin Zhang (ORCID: https://orcid.org/0000-0003-3554-2996)
- Lizuiyue Li
Institutions
- Southwest University of Science and Technology (CN)
- University of Electronic Science and Technology of China (CN)
- Southwest Forestry University (CN)
- Sichuan Agricultural University (CN)
- Sichuan Academy Of Social Sciences (CN)
- China Agricultural University (CN)
- Lanzhou University (CN)
Publication Details
- Journal
- Nature Communications
- Published
- 2025-04-01
- DOI
- https://doi.org/10.1038/s41467-025-58341-0
- Citations
- 5
- Primary Topic
- Wheat and Barley Genetics and Pathology
- Type
- article
- Field-Weighted Citation Impact
- 8.75