Fragmented habitats and Pleistocene climate shaped diversification of the hoary bamboo rat (Rhizomys pruinosus) in the mountainous plateau of SW China  

作　　者：Yong Gao Yue-Hui Yan Si Yin Long Yu Lei Zhu Xue-Mei Ding Ya-Nan Zhang Huan-Huan Chen Li-Jun Tang Zhu-Mei Li Hong-Long Chu Xiao-Dong Shi Zheng-Rong Zou Li-Zhou Tang 

机构地区：[1]Center for Yunnan Plateau Biological Resources Protection and Utilization,College of Biological Resource and Food Engineering,Qujing Normal University,Qujing 655011,Yunnan,China [2]College of Forestry,Southwest Forestry University,Kunming 650224,China [3]College of Lifesciences,Jiangxi Normal University,Nanchang 330022,China

出　　处：《Journal of Systematics and Evolution》2022年第6期1358-1370,共13页植物分类学报（英文版）

基　　金：This work is supported by the Key Laboratory of Yunnan Province Universities of the Diversity and Ecological Adaptive Evolution for Animals and Plants on Yungui Plateau and the National Natural Science Foundation of China(Grant Nos 31760103,31260087,31460561,and 31660680);Li-Zhou Tang acknowledges the Yunnan Applied Basic Research Projects(Grant No.2018FB050);the training funds of the Ten-Thousand Talents program of Yunnan Province.

摘　　要：The southwest mountainous region of China has been characterized as one of the worldwide biodiversity hotspots, but mechanisms underlying diversification of organisms in this region are still not clear. We assessed whether fragmented mountainous habitats and Pleistocene climate changes impacted the genetic diversity and diversification patterns of the hoary bamboo rat (Rhizomys pruinosus Blyth), a widely distributed species of rodent in SW China. Genetic diversity analyses were undertaken based on four mitochondrial DNA regions and 12 nuclear microsatellite loci (simple sequence repeats), representing 153 individuals from 24 populations across SW China. Moreover, we investigated correlations between genotype and geographical components, and predicted species distribution models for R. pruinosus under the historical and present climate conditions. Both mitochondrial DNA and simple sequence repeat markers revealed substantial genetic diversity and strong differentiation between populations. Phylogeographical analyses revealed two phylogenetic clades that were consistent with their geographical distributions (eastern and western clades). We inferred that the divergence of R. pruinosus was largely driven by Quaternary climatic oscillations and regionally fragmented mountainous habitats with environmental and geographical heterogeneity. Overall, our study revealed diversification patterns of R. pruinosus—patterns that may be shared by small alpine vertebrates in SW China.

关 键 词：biodiversity hotspot genetic diversity isolation by distance mitochondrial DNA Rhizomys pruinosus simple sequence repeat 

分 类 号：P53[天文地球—古生物学与地层学]