干旱区生态环境知识资源中心(Arid): Population genomics of Tillandsia landbeckii reveals unbalanced genetic diversity and founder effects in the Atacama Desert

Arid

DOI	10.1016/j.gloplacha.2019.103076
	Population genomics of Tillandsia landbeckii reveals unbalanced genetic diversity and founder effects in the Atacama Desert
	Merklinger, F. F.1; Zheng, Y.2; Luebert, F.1,3; Harpke, D.4; Boehnert, T.1; Stoll, A.5,6; Koch, M. A.7; Blattner, F. R.4; Wiehe, T.2; Quandt, D.1,4
通讯作者	Merklinger, F. F.
来源期刊	GLOBAL AND PLANETARY CHANGE
ISSN	0921-8181
EISSN	1872-6364
出版年	2020
卷号	184
英文摘要	In hyper-arid habitats vegetation tends to be highly patchy with individual plant populations set widely apart from each other. In the Atacama Desert of northern Chile, rainfall is essentially absent, but fog occurring both at the coast and sometimes reaching inland areas supports patches of vegetation in an otherwise barren environment. Tillandsia landbeckii (Bromeliaceae), a epiarenic plant without functional roots, completely depends on fog as source for water, therefore it is found only in fog corridors. Here, we investigate the genetic connectivity within and between populations of T. landbeckii, using genome-wide single-nucleotide-polymorphisms (SNP) obtained through genotyping-by-sequencing (GBS). The 21 sampled populations from the Chilean Atacama Desert are distributed in three geographically ordered south to north clusters, with the southern cluster containing only one population that is genetically very distant from the others. From our study we obtained three genetic groups that corresponded to these three geographical clusters, with the exception of the two populations 16 and 18, where genetic affiliation lies at least in part with the central cluster. Further, our results show uneven distribution of genetic diversity among the populations with highest diversity in the central cluster. We found large amounts of shared heterozygous SNPs as well as negative values for the inbreeding coefficient F-IS in the populations of the north and south. They indicate that these populations are strongly affected by clonal reproduction, while the populations in the center are mostly reproducing sexually. We interpret these data as the result of genetic bottlenecks due to founder events involving few dispersing genotypes combined with strong geographical isolation for the northern and southern populations, following stepping stone dispersal of Tillandsia during more climatically favorable episodes.
英文关键词	Tillandsia Bromeliaceae Genotyping-by-sequencing Population genetics
类型	Article
语种	英语
国家	Germany ; Chile
收录类别	SCI-E
WOS记录号	WOS:000508491500014
WOS关键词	PLANT-POPULATIONS ; BROMELIACEAE ; VEGETATION ; BIOGEOGRAPHY ; EVOLUTION ; PATTERNS ; CHILE ; LOMAS
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
EI主题词	2020-01-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/312317
作者单位	1.Univ Bonn, Nees Inst Biodivers Plants, Meckenheimer Allee 170, D-53115 Bonn, Germany; 2.Univ Cologne, Inst Genet, Zulpicher Str 47a, D-50674 Cologne, Germany; 3.Univ Chile, Dept Silvicultura & Conservac Nat, Av Santa Rosa 11315, Santiago, Chile; 4.Leibniz Inst Plant Genet & Crop Plant Res IPK, Corrensstr 3, D-06466 Gatersleben, Germany; 5.Univ La Serena, CEAZA, Raul Bitran 1305, La Serena, Chile; 6.Univ Serena, Inst Invest Multidisciplinar Ciencia & Tecnol, La Serena, Chile; 7.Heidelberg Univ, Ctr Organismal Studies, Biodivers & Plant Systemat, Neuenheimer Feld 345, Heidelberg, Germany
推荐引用方式 GB/T 7714	Merklinger, F. F.,Zheng, Y.,Luebert, F.,et al. Population genomics of Tillandsia landbeckii reveals unbalanced genetic diversity and founder effects in the Atacama Desert[J],2020,184.
APA	Merklinger, F. F..,Zheng, Y..,Luebert, F..,Harpke, D..,Boehnert, T..,...&Quandt, D..(2020).Population genomics of Tillandsia landbeckii reveals unbalanced genetic diversity and founder effects in the Atacama Desert.GLOBAL AND PLANETARY CHANGE,184.
MLA	Merklinger, F. F.,et al."Population genomics of Tillandsia landbeckii reveals unbalanced genetic diversity and founder effects in the Atacama Desert".GLOBAL AND PLANETARY CHANGE 184(2020).