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Multiple introductions from multiple sources: invasion patterns for an important Eucalyptus leaf pathogen
Many population studies on invasive plant pathogens are undertaken without knowing the center of origin of the pathogen. Most leaf pathogens of Eucalyptus originate in Australia and consequently with indigenous populations available, and it is possible to study the pathways of invasion. Teratosphaer...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4588637/ https://www.ncbi.nlm.nih.gov/pubmed/26445668 http://dx.doi.org/10.1002/ece3.1693 |
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author | Taole, Matsepo Bihon, Wubetu Wingfield, Brenda D. Wingfield, Michael J. Burgess, Treena I. |
author_facet | Taole, Matsepo Bihon, Wubetu Wingfield, Brenda D. Wingfield, Michael J. Burgess, Treena I. |
author_sort | Taole, Matsepo |
collection | PubMed |
description | Many population studies on invasive plant pathogens are undertaken without knowing the center of origin of the pathogen. Most leaf pathogens of Eucalyptus originate in Australia and consequently with indigenous populations available, and it is possible to study the pathways of invasion. Teratosphaeria suttonii is a commonly occurring leaf pathogen of Eucalyptus species, naturally distributed in tropical and subtropical regions of eastern Australia where it is regarded as a minor pathogen infecting older leaves; however, repeated infections, especially in exotic plantations, can result in severe defoliation and tree deaths. Nine polymorphic microsatellite markers were used to assess the genetic structure of 11 populations of T. suttonii of which four where from within its native range in eastern Australia and the remaining seven from exotic Eucalyptus plantations. Indigenous populations exhibited high allele and haplotype diversity, predominantly clonal reproduction, high population differentiation, and low gene flow. The diversity of the invasive populations varied widely, but in general, the younger the plantation industry in a country or region, the lower the diversity of T. suttonii. Historical gene flow was from Australia, and while self‐recruitment was dominant in all populations, there was evidence for contemporary gene flow, with South Africa being the most common source and Uruguay the most common sink population. This points distinctly to human activities underlying long‐distance spread of this pathogen, and it highlights lessons to be learned regarding quarantine. |
format | Online Article Text |
id | pubmed-4588637 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-45886372015-10-06 Multiple introductions from multiple sources: invasion patterns for an important Eucalyptus leaf pathogen Taole, Matsepo Bihon, Wubetu Wingfield, Brenda D. Wingfield, Michael J. Burgess, Treena I. Ecol Evol Original Research Many population studies on invasive plant pathogens are undertaken without knowing the center of origin of the pathogen. Most leaf pathogens of Eucalyptus originate in Australia and consequently with indigenous populations available, and it is possible to study the pathways of invasion. Teratosphaeria suttonii is a commonly occurring leaf pathogen of Eucalyptus species, naturally distributed in tropical and subtropical regions of eastern Australia where it is regarded as a minor pathogen infecting older leaves; however, repeated infections, especially in exotic plantations, can result in severe defoliation and tree deaths. Nine polymorphic microsatellite markers were used to assess the genetic structure of 11 populations of T. suttonii of which four where from within its native range in eastern Australia and the remaining seven from exotic Eucalyptus plantations. Indigenous populations exhibited high allele and haplotype diversity, predominantly clonal reproduction, high population differentiation, and low gene flow. The diversity of the invasive populations varied widely, but in general, the younger the plantation industry in a country or region, the lower the diversity of T. suttonii. Historical gene flow was from Australia, and while self‐recruitment was dominant in all populations, there was evidence for contemporary gene flow, with South Africa being the most common source and Uruguay the most common sink population. This points distinctly to human activities underlying long‐distance spread of this pathogen, and it highlights lessons to be learned regarding quarantine. John Wiley and Sons Inc. 2015-09-04 /pmc/articles/PMC4588637/ /pubmed/26445668 http://dx.doi.org/10.1002/ece3.1693 Text en © 2015 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Research Taole, Matsepo Bihon, Wubetu Wingfield, Brenda D. Wingfield, Michael J. Burgess, Treena I. Multiple introductions from multiple sources: invasion patterns for an important Eucalyptus leaf pathogen |
title | Multiple introductions from multiple sources: invasion patterns for an important Eucalyptus leaf pathogen |
title_full | Multiple introductions from multiple sources: invasion patterns for an important Eucalyptus leaf pathogen |
title_fullStr | Multiple introductions from multiple sources: invasion patterns for an important Eucalyptus leaf pathogen |
title_full_unstemmed | Multiple introductions from multiple sources: invasion patterns for an important Eucalyptus leaf pathogen |
title_short | Multiple introductions from multiple sources: invasion patterns for an important Eucalyptus leaf pathogen |
title_sort | multiple introductions from multiple sources: invasion patterns for an important eucalyptus leaf pathogen |
topic | Original Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4588637/ https://www.ncbi.nlm.nih.gov/pubmed/26445668 http://dx.doi.org/10.1002/ece3.1693 |
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