Genetic structure of the poplar rust fungus Melampsora larici-populina : Evidence for isolation by distance in Europe and recent founder effects overseas
International audience 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....
Published in: | Infection, Genetics and Evolution |
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Main Authors: | , , , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2008
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Online Access: | https://hal.inrae.fr/hal-02669196 https://doi.org/10.1016/j.meegid.2008.04.005 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
plant pathogen isolation by distance long distance dispersal gradual dispersal stochastic dispersal rust fungus virulence melampsora larici-populina populus nigra microsatellites peuplier noir génétique des populations [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] |
spellingShingle |
plant pathogen isolation by distance long distance dispersal gradual dispersal stochastic dispersal rust fungus virulence melampsora larici-populina populus nigra microsatellites peuplier noir génétique des populations [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] Barres, Benoît Halkett, Fabien, Dutech, Christian Cyril Andrieux, Axelle Pinon, Jean Frey, Pascal Genetic structure of the poplar rust fungus Melampsora larici-populina : Evidence for isolation by distance in Europe and recent founder effects overseas |
topic_facet |
plant pathogen isolation by distance long distance dispersal gradual dispersal stochastic dispersal rust fungus virulence melampsora larici-populina populus nigra microsatellites peuplier noir génétique des populations [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] |
description |
International audience 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. |
author2 |
Biologie et Génétique des Interactions Plantes-Agents Pathogènes Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure Agronomique de Montpellier (ENSA M)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro) Interactions Arbres-Microorganismes (IAM) Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL) Biodiversité, Gènes & Communautés (BioGeCo) Institut National de la Recherche Agronomique (INRA)-Université de Bordeaux (UB) |
format |
Article in Journal/Newspaper |
author |
Barres, Benoît Halkett, Fabien, Dutech, Christian Cyril Andrieux, Axelle Pinon, Jean Frey, Pascal |
author_facet |
Barres, Benoît Halkett, Fabien, Dutech, Christian Cyril Andrieux, Axelle Pinon, Jean Frey, Pascal |
author_sort |
Barres, Benoît |
title |
Genetic structure of the poplar rust fungus Melampsora larici-populina : Evidence for isolation by distance in Europe and recent founder effects overseas |
title_short |
Genetic structure of the poplar rust fungus Melampsora larici-populina : Evidence for isolation by distance in Europe and recent founder effects overseas |
title_full |
Genetic structure of the poplar rust fungus Melampsora larici-populina : Evidence for isolation by distance in Europe and recent founder effects overseas |
title_fullStr |
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 |
Genetic structure of the poplar rust fungus Melampsora larici-populina : Evidence for isolation by distance in Europe and recent founder effects overseas |
title_sort |
genetic structure of the poplar rust fungus melampsora larici-populina : evidence for isolation by distance in europe and recent founder effects overseas |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.inrae.fr/hal-02669196 https://doi.org/10.1016/j.meegid.2008.04.005 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
ISSN: 1567-1348 EISSN: 1567-7257 Infection, Genetics and Evolution https://hal.inrae.fr/hal-02669196 Infection, Genetics and Evolution, Elsevier, 2008, 8 (5), pp.577-587. ⟨10.1016/j.meegid.2008.04.005⟩ |
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info:eu-repo/semantics/altIdentifier/doi/10.1016/j.meegid.2008.04.005 hal-02669196 https://hal.inrae.fr/hal-02669196 doi:10.1016/j.meegid.2008.04.005 PRODINRA: 23908 WOS: 000260160900009 |
op_doi |
https://doi.org/10.1016/j.meegid.2008.04.005 |
container_title |
Infection, Genetics and Evolution |
container_volume |
8 |
container_issue |
5 |
container_start_page |
577 |
op_container_end_page |
587 |
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1766042835525566464 |
spelling |
ftccsdartic:oai:HAL:hal-02669196v1 2023-05-15T16:52:30+02:00 Genetic structure of the poplar rust fungus Melampsora larici-populina : Evidence for isolation by distance in Europe and recent founder effects overseas Barres, Benoît Halkett, Fabien, Dutech, Christian Cyril Andrieux, Axelle Pinon, Jean Frey, Pascal Biologie et Génétique des Interactions Plantes-Agents Pathogènes Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure Agronomique de Montpellier (ENSA M)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro) Interactions Arbres-Microorganismes (IAM) Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL) Biodiversité, Gènes & Communautés (BioGeCo) Institut National de la Recherche Agronomique (INRA)-Université de Bordeaux (UB) 2008 https://hal.inrae.fr/hal-02669196 https://doi.org/10.1016/j.meegid.2008.04.005 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.meegid.2008.04.005 hal-02669196 https://hal.inrae.fr/hal-02669196 doi:10.1016/j.meegid.2008.04.005 PRODINRA: 23908 WOS: 000260160900009 ISSN: 1567-1348 EISSN: 1567-7257 Infection, Genetics and Evolution https://hal.inrae.fr/hal-02669196 Infection, Genetics and Evolution, Elsevier, 2008, 8 (5), pp.577-587. ⟨10.1016/j.meegid.2008.04.005⟩ plant pathogen isolation by distance long distance dispersal gradual dispersal stochastic dispersal rust fungus virulence melampsora larici-populina populus nigra microsatellites peuplier noir génétique des populations [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] info:eu-repo/semantics/article Journal articles 2008 ftccsdartic https://doi.org/10.1016/j.meegid.2008.04.005 2021-10-09T23:19:34Z International audience 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. Article in Journal/Newspaper Iceland Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Canada Infection, Genetics and Evolution 8 5 577 587 |