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濒危日本鳗鲡远距离洄游的遗传结构与群体基因组学

Genetic architecture of long-distance migration and population genomics of the endangered Japanese eel.

作者信息

Liu Yan-Fang, Li Yu-Long, Xing Teng-Fei, Xue Dong-Xiu, Liu Jin-Xian

机构信息

CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.

Laboratory for Marine Ecology and Environmental Science, Qingdao Marine Science and Technology Center, Qingdao 266237, China.

出版信息

iScience. 2024 Jul 22;27(8):110563. doi: 10.1016/j.isci.2024.110563. eCollection 2024 Aug 16.

DOI:10.1016/j.isci.2024.110563
PMID:39165844
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11334786/
Abstract

The Japanese eel (), a flagship anguillid species for conservation, is known for its long-distance-oriented migration. However, our understanding of the genetic architecture underlying long-distance migration and population genomic characteristics of is still limited. Here, we generated a high-quality chromosome-level genome assembly and conducted whole-genome resequencing of 218 individuals to explore these aspects. Strong signals of selection were found on genes involved in long-distance aerobic exercise and navigation, which might be associated with evolutionary adaptation to long-distance migrations. Low genetic diversity was detected, which might result from genetic drift associated with demographic declines. Both mitochondrial and nuclear genomic datasets supported the existence of a single panmictic population for Japanese eel, despite signals of single-generation selection. Candidate genes for local selection involved in functions like development and circadian rhythm. The findings can provide insights to adaptative evolution to long-distance migration and inform conservation efforts for .

摘要

日本鳗鲡（）是一种用于保护的旗舰鳗鲡科物种，以其远距离定向洄游而闻名。然而，我们对其远距离洄游背后的遗传结构以及种群基因组特征的了解仍然有限。在此，我们生成了高质量的染色体水平基因组组装，并对218个个体进行了全基因组重测序，以探索这些方面。在参与远距离有氧运动和导航的基因上发现了强烈的选择信号，这可能与对远距离洄游的进化适应有关。检测到低遗传多样性，这可能是由于与种群数量下降相关的遗传漂变所致。尽管存在单代选择信号，但线粒体和核基因组数据集均支持日本鳗鲡存在单一随机交配种群。参与发育和昼夜节律等功能的局部选择候选基因。这些发现可为对远距离洄游的适应性进化提供见解，并为日本鳗鲡的保护工作提供参考。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/198b/11334786/ddf61afc060c/gr4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/198b/11334786/c11238921d67/fx1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/198b/11334786/a0bf54847827/gr1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/198b/11334786/1b3d135a6852/gr2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/198b/11334786/d55e573f7163/gr3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/198b/11334786/ddf61afc060c/gr4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/198b/11334786/c11238921d67/fx1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/198b/11334786/a0bf54847827/gr1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/198b/11334786/1b3d135a6852/gr2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/198b/11334786/d55e573f7163/gr3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/198b/11334786/ddf61afc060c/gr4.jpg

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