Whole-genome sequencing of Tarim red deer (Cervus elaphus yarkandensis) reveals demographic history and adaptations to an arid-desert environment

Frontiers in Zoology

Shamshidin Abduriyim¹  Tayerjan Mamat²  Yilamujiang Tohetahong²  Adil Ahmat²  Mahmut Halik²  Buweihailiqiemu Ababaikeri³ 

[1] College of Life Science, Shihezi University, 832003, Shihezi, Xinjiang, China;Department of Ecology, Hubei Key Laboratory of Cell Homeostasis, College of Life Science, Wuhan University, 430072, Wuhan, Hubei, China;College of Life Sciences and Technology, Xinjiang University, 830046, Urumqi, Xinjiang, China;College of Life Sciences and Technology, Xinjiang University, 830046, Urumqi, Xinjiang, China;College of Xinjiang Uyghur Medicine, 848000, Hoten, Xinjiang, China;

关键词: Arid-desert environment;    Cervus elaphus;    Environmental adaptability;    Population demographic history;    Tarim red deer;    Whole genome sequencing;   

DOI  :  10.1186/s12983-020-00379-5

来源: Springer

【 摘 要 】

BackgroundThe initiation of desert conditions in the Tarim Basin in China since the late Miocene has led to the significant genetic structuring of local organisms. Tarim Red Deer (Cervus elaphus yarkandensis, TRD) have adapted to the harsh environmental conditions in this basin, including high solar radiation and temperature, aridity, and poor nutritional conditions. However, the underlying genetic basis of this adaptation is poorly understood.ResultsWe sequenced the whole genomes of 13 TRD individuals, conducted comparative genomic analyses, and estimated demographic fluctuation. The ∂a∂i model estimated that the TRD and Tule elk (Cervus canadensis nannodes) populations diverged approximately 0.98 Mya. Analyses revealed a substantial influence of the Earth’s climate on the effective population size of TRD, associated with glacial advances and retreat, and human activities likely underlie a recent serious decline in population. A marked bottleneck may have profoundly affected the genetic diversity of TRD populations. We detected a set of candidate genes, pathways, and GO categories related to oxidative stress, water reabsorption, immune regulation, energy metabolism, eye protection, heat stress, respiratory system adaptation, prevention of high blood pressure, and DNA damage and repair that may directly or indirectly be involved in the adaptation of TRD to an arid-desert environment.ConclusionsOur analyses highlight the role of historical global climates in the population dynamics of TRD. In light of ongoing global warming and the increasing incidence of droughts, our study offers insights into the genomic adaptations of animals, especially TRD, to extreme arid-desert environments and provides a valuable resource for future research on conservation design and biological adaptations to environmental change.

【 授权许可】

CC BY