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The role of introgression during the radiation of endemic fishes adapted to living at extreme altitudes in the Tibetan Plateau

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2023

Autor:innen

Qian, Yuting
Meng, Minghui
Zhou, Chaowei
Liu, Haiping
Jiang, Haifeng
Xu, Youwei
Chen, Wenjun
He, Shunping
Yang, Liandong
et al.

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Molecular Biology and Evolution. Oxford University Press. 2023, 40(6), msad129. ISSN 0737-4038. eISSN 1537-1719. Available under: doi: 10.1093/molbev/msad129

Zusammenfassung

Recent genomic analyses of evolutionary radiations suggest that ancient introgression may facilitate rapid diversification and adaptive radiation. The loach genus Triplophysa, a genus with most species endemic to Tibetan plateau, shows ecological diversity and rapid evolution, and represents a potential example of adaptive radiation linked to the uplift of the Tibetan Plateau. Here, we interrogate the complex evolutionary history of Triplophysa fishes through the analysis of whole-genome sequences. By reconstructing the phylogeny of Triplophysa, quantifying introgression across this clade, and simulating speciation and migration processes, we confirm that extensive gene flow events occurred across disparate Triplophysa species. Our results suggest that introgression plays a more substantial role than incomplete lineage sorting in underpinning phylogenetic discordance in Triplophysa. The results also indicate that genomic regions affected by ancient gene flow exhibit characteristics of lower recombination rates and nucleotide diversity and may associate with selection. Simulation analysis of T. tibetana suggests that the species may have been affected by the Gonghe Movement in the third uplift of the Tibetan plateau, resulting in founder effects and a subsequent reduction in Ne.

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570 Biowissenschaften, Biologie

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phylogenetic conflict, introgression, reticulation, recombination, Triplophysa

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ISO 690QIAN, Yuting, Minghui MENG, Chaowei ZHOU, Haiping LIU, Haifeng JIANG, Youwei XU, Wenjun CHEN, Axel MEYER, Shunping HE, Liandong YANG, 2023. The role of introgression during the radiation of endemic fishes adapted to living at extreme altitudes in the Tibetan Plateau. In: Molecular Biology and Evolution. Oxford University Press. 2023, 40(6), msad129. ISSN 0737-4038. eISSN 1537-1719. Available under: doi: 10.1093/molbev/msad129
BibTex
@article{Qian2023-05-29intro-67096,
  year={2023},
  doi={10.1093/molbev/msad129},
  title={The role of introgression during the radiation of endemic fishes adapted to living at extreme altitudes in the Tibetan Plateau},
  number={6},
  volume={40},
  issn={0737-4038},
  journal={Molecular Biology and Evolution},
  author={Qian, Yuting and Meng, Minghui and Zhou, Chaowei and Liu, Haiping and Jiang, Haifeng and Xu, Youwei and Chen, Wenjun and Meyer, Axel and He, Shunping and Yang, Liandong},
  note={Article Number: msad129}
}
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