| Autor: |
Xu, Yanchao, Wei, Yangyang, Zhou, Zhongli, Cai, Xiaoyan, Boden, Scott, Umer, Muhammad Jawad, Safdar, Luqman Bin, Liu, Yuling, Jin, Dingsha, Hou, Yuqing, Wang, Yuhong, Wall, Sarah Brooke, Wang, Kunbo, Yu, Shuxun, Zhang, Baohong, Peng, Renhai, Liu, Fang |
| Zdroj: |
Plant Communications; 20230101, Issue: Preprints |
| Abstrakt: |
Cotton (Gossypium) stands as a crucial economic crop, serving as the primary source of natural fiber for the textile sector. However, the evolutionary mechanisms driving speciation within the Gossypiumgenus remain unresolved. In this investigation, we leveraged 25 Gossypiumgenomes and introduced four novel assemblies—G. harknessii, G. gossypioides, G. trilobum, and G. klotzschianum(Gklo)—to delve into the speciation history of this genus. Notably, we encountered intricate phylogenies potentially stemming from introgression. These complexities are further compounded by incomplete lineage sorting (ILS), a factor likely to have been instrumental in shaping the swift diversification of cotton. Our focus subsequently shifted to the rapid radiation episode during a concise period in Gossypiumevolution. For a recently diverged lineage comprising G. davidsonii, Gklo, and G. raimondii, we constructed a finely detailed ILS map. Intriguingly, this analysis revealed the non-random distribution of ILS regions across the reference Gklogenome. Moreover, we identified signs of robust natural selection influencing specific ILS regions. Noteworthy variations pertaining to speciation emerged between the closely related sister species Gkloand G. davidsonii. Approximately 15.74% of speciation structural variation genes and 12.04% of speciation-associated genes were estimated to intersect with ILS signatures. These findings enrich our understanding of the role of ILS in adaptive radiation, shedding fresh light on the intricate speciation history of the Gossypiumgenus. |
| Databáze: |
Supplemental Index |
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