Data from: Genetic structure of the poplar rust fungus Melampsora larici-populina: Evidence for isolation by distance in Europe and recent founder effects overseas
Dispersal has a great impact on the genetic structure of populations, but remains difficult to estimate by direct measures. In particular, gradual and stochastic dispersal are often difficult to assess and to distinguish, although they have different evolutionary consequences. Plant pathogens, espec...
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ftdatacite:10.5061/dryad.77900 2023-05-15T16:52:22+02:00 Data from: Genetic structure of the poplar rust fungus Melampsora larici-populina: Evidence for isolation by distance in Europe and recent founder effects overseas Barrès, Benoît Halkett, Fabien Dutech, Cyril Andrieux, Axelle Pinon, Jean Frey, Pascal 2012 https://dx.doi.org/10.5061/dryad.77900 http://datadryad.org/stash/dataset/doi:10.5061/dryad.77900 en eng Dryad https://dx.doi.org/10.1016/j.meegid.2008.04.005 Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 CC0 Rust fungus isolation by distance plant pathogen long distance dispersal Virulence Populus nigra Gradual dispersal Melampsora larici-populina Populus trichocarpa Stochastic dispersal dataset Dataset 2012 ftdatacite https://doi.org/10.5061/dryad.77900 https://doi.org/10.1016/j.meegid.2008.04.005 2022-02-08T12:53:43Z Dispersal has a great impact on the genetic structure of populations, but remains difficult to estimate by direct measures. In particular, gradual and stochastic dispersal are often difficult to assess and to distinguish, although they have different evolutionary consequences. Plant pathogens, especially rust fungi, are suspected to display both dispersal modes, though on different spatial scales. In this study, we inferred dispersal capacities of the poplar rust fungus Melampsora larici-populina by examining the genetic diversity and structure of 13 populations from eight European and two overseas countries in the Northern hemisphere. M. larici-populina was sampled from both cultivated hybrid poplars and on the wild host, Populus nigra. The populations were analyzed with 11 microsatellite and 8 virulence markers. Although isolates displayed different virulence profiles according to the host plant, neutral markers revealed little population differentiation with respect to the type of host. This suggests an absence of reproductive isolation between populations sampled from cultivated and wild poplars. Conversely, studying the relationship between geographic and genetic structure allowed us to distinguish between isolation by distance (IBD) patterns and long distance dispersal (LDD) events. The European populations exhibited a significant IBD pattern, suggesting a regular and gradual dispersal of the pathogen over this spatial scale. Nonetheless, the genetic differentiation between these populations was low, suggesting an important gene flow on a continental scale. The two overseas populations from Iceland and Canada were shown to result from rare LDD events, and exhibited signatures of strong founder effects. Furthermore, the high genetic differentiation between both populations suggested that these two recent introductions were independent. This study illustrated how the proper use of population genetics methods can enable contrasted dispersal modes to be revealed. : DATA-IGE-2008 Dataset Iceland DataCite Metadata Store (German National Library of Science and Technology) Canada |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Rust fungus isolation by distance plant pathogen long distance dispersal Virulence Populus nigra Gradual dispersal Melampsora larici-populina Populus trichocarpa Stochastic dispersal |
spellingShingle |
Rust fungus isolation by distance plant pathogen long distance dispersal Virulence Populus nigra Gradual dispersal Melampsora larici-populina Populus trichocarpa Stochastic dispersal Barrès, Benoît Halkett, Fabien Dutech, Cyril Andrieux, Axelle Pinon, Jean Frey, Pascal Data from: Genetic structure of the poplar rust fungus Melampsora larici-populina: Evidence for isolation by distance in Europe and recent founder effects overseas |
topic_facet |
Rust fungus isolation by distance plant pathogen long distance dispersal Virulence Populus nigra Gradual dispersal Melampsora larici-populina Populus trichocarpa Stochastic dispersal |
description |
Dispersal has a great impact on the genetic structure of populations, but remains difficult to estimate by direct measures. In particular, gradual and stochastic dispersal are often difficult to assess and to distinguish, although they have different evolutionary consequences. Plant pathogens, especially rust fungi, are suspected to display both dispersal modes, though on different spatial scales. In this study, we inferred dispersal capacities of the poplar rust fungus Melampsora larici-populina by examining the genetic diversity and structure of 13 populations from eight European and two overseas countries in the Northern hemisphere. M. larici-populina was sampled from both cultivated hybrid poplars and on the wild host, Populus nigra. The populations were analyzed with 11 microsatellite and 8 virulence markers. Although isolates displayed different virulence profiles according to the host plant, neutral markers revealed little population differentiation with respect to the type of host. This suggests an absence of reproductive isolation between populations sampled from cultivated and wild poplars. Conversely, studying the relationship between geographic and genetic structure allowed us to distinguish between isolation by distance (IBD) patterns and long distance dispersal (LDD) events. The European populations exhibited a significant IBD pattern, suggesting a regular and gradual dispersal of the pathogen over this spatial scale. Nonetheless, the genetic differentiation between these populations was low, suggesting an important gene flow on a continental scale. The two overseas populations from Iceland and Canada were shown to result from rare LDD events, and exhibited signatures of strong founder effects. Furthermore, the high genetic differentiation between both populations suggested that these two recent introductions were independent. This study illustrated how the proper use of population genetics methods can enable contrasted dispersal modes to be revealed. : DATA-IGE-2008 |
format |
Dataset |
author |
Barrès, Benoît Halkett, Fabien Dutech, Cyril Andrieux, Axelle Pinon, Jean Frey, Pascal |
author_facet |
Barrès, Benoît Halkett, Fabien Dutech, Cyril Andrieux, Axelle Pinon, Jean Frey, Pascal |
author_sort |
Barrès, Benoît |
title |
Data from: Genetic structure of the poplar rust fungus Melampsora larici-populina: Evidence for isolation by distance in Europe and recent founder effects overseas |
title_short |
Data from: Genetic structure of the poplar rust fungus Melampsora larici-populina: Evidence for isolation by distance in Europe and recent founder effects overseas |
title_full |
Data from: Genetic structure of the poplar rust fungus Melampsora larici-populina: Evidence for isolation by distance in Europe and recent founder effects overseas |
title_fullStr |
Data from: Genetic structure of the poplar rust fungus Melampsora larici-populina: Evidence for isolation by distance in Europe and recent founder effects overseas |
title_full_unstemmed |
Data from: Genetic structure of the poplar rust fungus Melampsora larici-populina: Evidence for isolation by distance in Europe and recent founder effects overseas |
title_sort |
data from: genetic structure of the poplar rust fungus melampsora larici-populina: evidence for isolation by distance in europe and recent founder effects overseas |
publisher |
Dryad |
publishDate |
2012 |
url |
https://dx.doi.org/10.5061/dryad.77900 http://datadryad.org/stash/dataset/doi:10.5061/dryad.77900 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
https://dx.doi.org/10.1016/j.meegid.2008.04.005 |
op_rights |
Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 |
op_rightsnorm |
CC0 |
op_doi |
https://doi.org/10.5061/dryad.77900 https://doi.org/10.1016/j.meegid.2008.04.005 |
_version_ |
1766042561385857024 |