| 作者 |
張海濱, Shuai Sun, 劉君, Qunfei Guo, Liang Meng, Jianwei Chen,Xueyan Xiang, 周洋, Nannan Zhang, 劉合露, Yalin Liu, Guoyong Yan, Qianyue Ji, L賀麗生,蔡珊雅, Chongyang Cai, 黃馨, Shiyu Xu, 肖云路, Yangrui Zhang, Kun Wang, Yujing Liu,Haixin Chen, Zhen Yue, 何舜平, Jian Wang, Huanming Yang, Xin Liu, Inge Seim, Ying Gu, Qiye Li,Guojie Zhang, Simon Ming-Yuen Lee, Karsten Kristiansen, Xun Xu,* Shanshan Liu,*and Guangyi Fan*
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| 摘要 |
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-genomesequencing 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 re-flects 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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