首页|Comparative genomics of widespread and narrow-range white-bellied rats in the Niviventer niviventer species complex sheds light on invasive rodent success

Comparative genomics of widespread and narrow-range white-bellied rats in the Niviventer niviventer species complex sheds light on invasive rodent success

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Widespread species that inhabit diverse environments possess large population sizes and exhibit a high capacity for environmental adaptation,thus enabling range expansion.In contrast,narrow-range species are confined to restricted geographical areas and are ecologically adapted to narrow environmental conditions,thus limiting their ability to expand into novel environments.However,the genomic mechanisms underlying the differentiation between closely related species with varying distribution ranges remain poorly understood.The Niviventer niviventer species complex(NNSC),consisting of highly abundant wild rats in Southeast Asia and China,offers an excellent opportunity to investigate these questions due to the presence of both widespread and narrow-range species that are phylogenetically closely related.In the present study,we combined ecological niche modeling with phylogenetic analysis,which suggested that sister species cannot be both widespread and dominant within the same geographical region.Moreover,by assessing heterozygosity,linkage disequilibrium decay,and Tajima's D analysis,we found that widespread species exhibited higher genetic diversity than narrow-range species.In addition,by exploring the"genomic islands of speciation",we identified 13 genes in highly divergent regions that were shared by the two widespread species,distinguishing them from their narrow-range counterparts.Functional annotation analysis indicated that these genes are involved in nervous system development and regulation.The adaptive evolution of these genes likely played an important role in the speciation of these widespread species.

Niviventer niviventer species complexWidespread speciesNarrow-range speciesSpeciationGenomic islands of differentiationPhylogenomics

Xin-Lai Wu、Dan-Ping Mu、Qi-Sen Yang、Yu Zhang、Yu-Chun Li、Anderson Feijó、Ji-Long Cheng、Zhi-Xin Wen、Liang Lu、Lin Xia、Zhi-Jun Zhou、Yan-Hua Qu、De-Yan Ge

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Key Laboratory of Zoological Systematics and Application of Hebei Province,College of Life Sciences,Hebei University,Baoding,Hebei 071002,China

Key Laboratory of Zoological Systematics and Evolution,Institute of Zoology,Chinese Academy of Sciences,Beichen West Road,Chaoyang District,Beijing 100101,China

Hebei Basic Science Center for Biotic Interaction,Institute of Life Science and Green Development,Hebei University,Baoding,Hebei 071002,China

Xinjiang Key Laboratory of Biological Resources and Genetic Engineering,College of Life Science and Technology,Xinjiang University,Urumqi,Xinjiang 830046,China

Marine College,Shandong University,Weihai,Shandong 264209,China

State Key Laboratory for Infectious Diseases Prevention and Control,National Institute for Communicable Disease Control and Prevention,Chinese Center for Disease Control and Prevention,Beijing 102206,China

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Guangdong Provincial Key R&D ProgramSecond Tibetan Plateau Scientific Expedition and Research ProgramNational Natural Science Foundation of China

2022B11110400012019QZKK0402/2019QZKK050132170426

2023

10.24272/j.issn.2095-8137.2022.519

动物学研究
中国科学院昆明动物研究所 中国动物学会

动物学研究

CSTPCDCSCD
影响因子：0.582
ISSN：0254-5853
年,卷(期)：2023.44(6)
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