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Main Authors: Zhang, Haibin, Sun, Shuai, Liu, Jun, Guo, Qunfei, Meng, Liang, Chen, Jianwei, Xiang, Xueyan, Zhou, Yang, Zhang, Nannan, Liu, Helu, Liu, Yalin, Yan, Guoyong, Ji, Qianyue, He, Lisheng, Cai, Shanya, Cai, Chongyang, Huang, Xin, Xu, Shiyu, Xiao, Yunlu, Zhang, Yangrui, Wang, Kun, Liu, Yujing, Chen, Haixin, Yue, Zhen, He, Shunping, Wang, Jian, Yang, Huanming, Liu, Xin, Seim, Inge, Gu, Ying, Li, Qiye, Zhang, Guojie, Lee, Simon Ming-Yuen, Kristiansen, Karsten, Xu, Xun, Liu, Shanshan, Fan, Guangyi
Format: Artículo científico
Language:en
Published: Cell 2025
Subjects:
Amphipoda
Animals
Genome
Population Dynamics
Adaptation, Physiological
Genetics, Population
Hydrostatic Pressure
Whole Genome Sequencing
Online Access:https://pubmed.ncbi.nlm.nih.gov/40054448/
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Table of Contents:
  • The amphipod genome reveals population dynamics and adaptations to hadal environment. Zhang, Haibin Sun, Shuai Liu, Jun Guo, Qunfei Meng, Liang Chen, Jianwei Xiang, Xueyan Zhou, Yang Zhang, Nannan Liu, Helu Liu, Yalin Yan, Guoyong Ji, Qianyue He, Lisheng Cai, Shanya Cai, Chongyang Huang, Xin Xu, Shiyu Xiao, Yunlu Zhang, Yangrui Wang, Kun Liu, Yujing Chen, Haixin Yue, Zhen He, Shunping Wang, Jian Yang, Huanming Liu, Xin Seim, Inge Gu, Ying Li, Qiye Zhang, Guojie Lee, Simon Ming-Yuen Kristiansen, Karsten Xu, Xun Liu, Shanshan Fan, Guangyi Amphipoda Animals Genome Population Dynamics Adaptation, Physiological Genetics, Population Hydrostatic Pressure Whole Genome Sequencing The amphipod Hirondellea gigas is a dominant species inhabiting the deepest part of the ocean (∼6,800-11,000 m), but little is known about its genetic adaptation and population dynamics. Here, we present a chromosome-level genome of H. gigas, characterized by a large genome size of 13.92 Gb. Whole-genome sequencing of 510 individuals from the Mariana Trench indicates no population differentiation across depths, suggesting its capacity to tolerate hydrostatic pressure across wide ranges. H. gigas in the West Philippine Basin is genetically divergent from the Mariana and Yap Trenches, suggesting genetic isolation attributed to the geographic separation of hadal features. A drastic reduction in effective population size potentially reflects glacial-interglacial changes. By integrating multi-omics analysis, we propose host-symbiotic microbial interactions may be crucial in the adaptation of H. gigas to the extremely high-pressure and food-limited environment. Our findings provide clues for adaptation to the hadal zone and population genetics.

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