Population genomics of Tillandsia landbeckii reveals unbalanced genetic diversity and founder effects in the Atacama Desert

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Title:Main Title: Population genomics of Tillandsia landbeckii reveals unbalanced genetic diversity and founder effects in the Atacama Desert
Description:Abstract: 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 FIS 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.
Identifier:10.1016/j.gloplacha.2019.103076 (DOI)
Citation Advice:Merklinger FF, Zheng Y, Luebert F, Harpke D, Böhnert T, Stoll A, Koch M, Blattner, FR, Wiehe T, Quandt D. Population genomics of Tillandsia landbeckii reveals unbalanced genetic diversity and founder effects in the Atacama Desert. Global and Planetary Change – Special issue CRC1211 – 184: 103076; 10.1016/j.gloplacha.2019.103076
Responsible Party
Creators:Felix F. Merklinger (Author), Yichen Zheng (Author), Federico Luebert (Author), Doerte Harpke (Author), Tim Böhnert (Author), Alexandra Stoll (Author), Marcus Koch (Author), Frank R Blattner (Author), Thomas Wiehe (Author), Dietmar Quandt (Author)
Funding Reference:Deutsche Forschungsgemeinschaft (DFG): CRC 1211: Earth - Evolution at the Dry Limit
Publisher:Elsevier
Publication Year:2021
Topic
CRC1211 Topic:Biology
Related Subproject:B1
Subjects:Keywords: Biodiversity, Biogeography, Ecology of Plants, Population Genetics
Geogr. Information Topic:Biota
File Details
Filename:099_Merklinger_Tillandsia.pdf
Data Type:Text - Article
File Size:3.3 MB
Date:Available: 06.11.2019
Mime Type:application/pdf
Data Format:PDF
Language:English
Status:Completed
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Download Permission:Only Project Members
General Access and Use Conditions:According to the CRC1211DB data policy agreement.
Access Limitations:According to the CRC1211DB data policy agreement.
Licence:[CRC1211DB] Data policy agreement
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Specific Information - Publication
Publication Status:Published
Review Status:Peer reviewed
Publication Type:Article
Article Type:Journal
Source:Global and Planetary Change
Source Website:https://doi.org/10.1016/j.gloplacha.2019.103076
Volume:184
Number of Pages:11 (1 - 11)
Metadata Details
Metadata Creator:Dietmar Quandt
Metadata Created:27.01.2021
Metadata Last Updated:27.01.2021
Subproject:B1
Funding Phase:1
Metadata Language:English
Metadata Version:V50
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