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A test of genetic divergence of a bird existing in the Sichuan Basin and its surrounding mountain ranges

Avian Research 2023年第4期14卷 553-564页

作者： Lu Wang Fangqing Liu Lan Zhao Yaling Xu Tianyu Zhang Longying Wen Key Laboratory of Sichuan Institute for Protecting Endangered Birds in the Southwest Mountains College of Life SciencesLeshan Normal UniversityLeshan614004China Chengdu Institute of Biology Chinese Academy of SciencesChengdu610299China College of Life Sciences Wuhan UniversityWuhan430072China

Island ecosystems,serving as natural laboratories,facilitate geographical isolation,ecological specialization,and species *** Sichuan Basin,surrounded by mountain ranges,represents a typical continental island due to its marked environmental spatial *** heterogeneity may contribute to geographical isolation and habitat heterogeneity,resulting in genetic divergence within ***,we used the white-browed laughingthrush(Garrulax sannio)as a model specimen to investigate the genetic divergence in the Sichuan Basin and its surrounding mountain ranges,given its presence in various habitats within and beyond this *** a RAD-seq dataset of 140 *** individuals from 17 distinct ecological zones in the Sichuan Basin and its surrounding mountain ranges,we conducted PCA,population structure analysis,phylogenetic tree construction,and gene flow analysis to comprehensively analyze *** ***,in conjunction with geographical and ecological data,we performed isolation by distance,isolation by environment,PCA,and latent factor mixed model analysis to identify factors influencing the genetic divergence among these *** *** summary,the 17 *** groups were categorized into high-elevation,medium-elevation,and lowelevation *** divergence in *** may be attributed to both geographical distance and key ecological factors,particularly elevation and key climatic ***,the high-elevation group exhibited a greater number of SNPs and selected genes associated with the key ecological factors compared to the lowelevation *** ADCY9 gene and several associated key pathways were identified as crucial elements driving ecological adaptation(elevation and key climatic variables)in the high-elevation ***,climate changes during the glacial cycles may have facilitated gene flow among these groups residing in the Sichuan Basin and its surrounding mountain *** finding

关键词： Genetic divergence Restriction site-associated DNA sequencing (RAD-seq) Sichuan Basin white-browed laughingthrush

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