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Data from: Extremely low genetic variability and highly structured local populations of Arabidopsis thaliana at higher latitudes

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Lewandowska-Sabat AM, Fjellheim S, Rognli OA (2010) Extremely low genetic variability and highly structured local populations of Arabidopsis thaliana at higher latitudes. Molecular Ecology 19(21): 4753-4764. doi:10.1111/j.1365-294X.2010.04840.x

Additionally, please cite the Dryad data package:

Lewandowska-Sabat AM, Fjellheim S, Rognli OA (2010) Data from: Extremely low genetic variability and highly structured local populations of Arabidopsis thaliana at higher latitudes. Dryad Digital Repository. doi:10.5061/dryad.1920
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Dryad Package Identifier doi:10.5061/dryad.1920    116 views  
Abstract The genetic diversity and population structure of Arabidopsis thaliana populations from Norway were studied and compared to a worldwide sample of A. thaliana in order to investigate the demographic history and elucidate possible colonization routes of populations at the northernmost species limit. We genotyped 282 individuals from 31 local populations using 149 single nucleotide polymorphism (SNP) markers. A high level of population subdivision (FST = 0.85 ± 0.007) was found indicating that A. thaliana is highly structured at the regional level. Significant relationships between genetic and geographic distances were found, suggesting an isolation by distance mode of evolution. Genetic diversity was much lower and the level of linkage disequilibrium (LD) higher in populations from the north (65–68oN) compared to populations from the south (59–62oN); this is consistent with a northward expansion pattern. A neighbor-joining (NJ) tree showed that populations from northern Norway form a separate cluster, while the remaining populations are distributed over a few minor clusters. Minimal gene flow seems to have occurred between populations in different regions, especially between the geographically distant northern and southern populations. Our data suggest that northern populations represent a homogenous group that may have been established from a few founders during northward expansions, while populations in the central part of Norway constitute an admixed group established by founders of different origins, most probably as a result of human-mediated gene flow. Moreover, Norwegian populations appeared to be homogenous and isolated compared to a worldwide sample of A. thaliana, but they are still grouped with Swedish populations, which may indicate common colonization histories.
Keywords Molecular Evolution, Population Ecology, Population Genetics - Empirical, Ecological Genetics,
Date Deposited 2010-08-27T18:20:27Z
Scientific Names Arabidopsis thaliana
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To the extent possible under law, the authors have waived all copyright and related or neighboring rights to this data.  


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