Ren Yue, Jia Ting, Cai Yanfei, Zhang Lin, Zhang Hao, Wang Zhengkun, Zhu Wanlong
Key Laboratory of Ecological Adaptive Evolution and Conservation on Animals-Plants in Southwest Mountain Ecosystem of Yunnan Province Higher Institutes College, School of Life Sciences Yunnan Normal University Kunming China.
College of Plant Protection Shanxi Agricultural University Taiyuan China.
Ecol Evol. 2023 Aug 3;13(8):e10370. doi: 10.1002/ece3.10370. eCollection 2023 Aug.
An important objective of evolutionary biology has always been to grasp the evolutionary and genetic processes that contribute to speciation. The present work provides the first detailed account of the genetic and physiological adaptation to changing environmental temperatures as well as the reasons causing intraspecific divergence in the from the Hengduan Mountain (HM) region, one of the biodiversity hotspots. One hundred sixty-one individuals from five populations in the HM region had their reduced-representation genome sequenced, and one additional individual from each community had their genomes resequenced. We then characterized the genetic diversity and population structure of each population and compared the phenotypic divergence in traits using neutral molecular markers. We detected significant phenotypic and genetic alterations in s from the HM region that were related to naturally occurring diverse habitats by combining morphometrics and genomic techniques. There was asymmetric gene flow among the populations, indicating that five populations exhibit an isolation-by-island model, and this was supported by the correlation between and geographic distance. Finally, estimated by phenotypic measures of most wild traits were higher than differentiation at neutral molecular markers, indicating directional natural selection favoring different phenotypes in different populations must have been involved to achieve this much differentiation. Our findings give information on the demographic history of , new insights into their evolution and adaptability, and literature for studies of a similar nature on other wild small mammals from the HM region.
进化生物学的一个重要目标一直是掌握促成物种形成的进化和遗传过程。本研究首次详细阐述了来自生物多样性热点地区之一的横断山地区的[物种名称]对环境温度变化的遗传和生理适应，以及导致种内分化的原因。对横断山地区五个种群的161个[物种名称]个体进行了简化基因组测序，并对每个群落额外的一个个体进行了全基因组重测序。然后，我们对每个种群的遗传多样性和种群结构进行了表征，并使用中性分子标记比较了性状的表型差异。通过结合形态测量学和基因组技术，我们检测到横断山地区[物种名称]与自然存在的多样栖息地相关的显著表型和遗传改变。[物种名称]种群之间存在不对称基因流，表明五个[物种名称]种群呈现岛屿隔离模型，这一点得到了[物种名称]与地理距离之间相关性的支持。最后，通过大多数野生性状的表型测量估计的[物种名称]分化高于中性分子标记处的分化，这表明必然涉及有利于不同种群中不同表型的定向自然选择，以实现如此大的分化。我们的研究结果提供了关于[物种名称]种群历史的信息，对其进化和适应性的新见解，以及为横断山地区其他野生小型哺乳动物进行类似性质研究提供文献参考。
