Genetic Structure and Eco-Geographical Differentiation of Lancea tibetica in the Qinghai-Tibetan Plateau

NWIPB OpenIR

	Genetic Structure and Eco-Geographical Differentiation of Lancea tibetica in the Qinghai-Tibetan Plateau
	Chi, Xiaofeng; Zhang, Faqi; Gao, Qingbo; Xing, Rui; Chen, Shilong
	2019
发表期刊	GENES
卷号	10 期号:2
摘要	The uplift of the Qinghai-Tibetan Plateau (QTP) had a profound impact on the plant speciation rate and genetic diversity. High genetic diversity ensures that species can survive and adapt in the face of geographical and environmental changes. The Tanggula Mountains, located in the central of the QTP, have unique geographical significance. The aim of this study was to investigate the effect of the Tanggula Mountains as a geographical barrier on plant genetic diversity and structure by using Lancea tibetica. A total of 456 individuals from 31 populations were analyzed using eight pairs of microsatellite makers. The total number of alleles was 55 and the number per locus ranged from 3 to 11 with an average of 6.875. The polymorphism information content (PIC) values ranged from 0.2693 to 0.7761 with an average of 0.4378 indicating that the eight microsatellite makers were efficient for distinguishing genotypes. Furthermore, the observed heterozygosity (H-o), the expected heterozygosity (H-e), and the Shannon information index (I) were 0.5277, 0.4949, and 0.9394, respectively, which indicated a high level of genetic diversity. We detected high genetic differentiation among all sampling sites and restricted gene flow among populations. Bayesian-based cluster analysis (STRUCTURE), principal coordinates analysis (PCoA), and Neighbor-Joining (NJ) cluster analysis based on microsatellite markers grouped the populations into two clusters: the southern branch and the northern branch. The analysis also detected genetic barriers and restricted gene flow between the two groups separated by the Tanggula Mountains. This study indicates that the geographical isolation of the Tanggula Mountains restricted the genetic connection and the distinct niches on the two sides of the mountains increased the intraspecific divergence of the plants.
关键词	Lancea tibetica Tanggula Mountains genetic diversity population structure microsatellite markers
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/59859
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Chi, Xiaofeng,Zhang, Faqi,Gao, Qingbo,et al. Genetic Structure and Eco-Geographical Differentiation of Lancea tibetica in the Qinghai-Tibetan Plateau[J]. GENES,2019,10(2).
APA	Chi, Xiaofeng,Zhang, Faqi,Gao, Qingbo,Xing, Rui,&Chen, Shilong.(2019).Genetic Structure and Eco-Geographical Differentiation of Lancea tibetica in the Qinghai-Tibetan Plateau.GENES,10(2).
MLA	Chi, Xiaofeng,et al."Genetic Structure and Eco-Geographical Differentiation of Lancea tibetica in the Qinghai-Tibetan Plateau".GENES 10.2(2019).