Phylogeographical analyses reveal global migration patterns of the barley scald pathogen Rhynchosporium secalis

Pascal L. Zaffarano; Bruce A. McDonald; Celeste C. Linde

doi:10.1111/j.1365-294X.2008.04013.x

Phylogeographical analyses reveal global migration patterns of the barley scald pathogen Rhynchosporium secalis

Pascal L. Zaffarano, Bruce A. McDonald, Celeste C. Linde

Research output: Contribution to journal › Article › peer-review

41 Citations (Scopus)

Abstract

A phylogeographical analysis of the scald pathogen Rhynchosporium secalis was conducted using nuclear DNA sequences from two neutral restriction fragment length polymorphism loci and the mating-type idiomorphs. Approximately 500 isolates sampled from more than 60 field populations from five continents were analysed to infer migration patterns and the demographic history of the fungus. Migration rates among continents were generally low, consistent with earlier reports of significant population subdivision among continents. Northern Europe was mainly a source population for global migration. We hypothesize that the pathogen only recently moved out of its centre of origin, resulting in founder populations that are reproductively isolated due to the contemporary absence of long-distance gene flow.

Original language	English
Pages (from-to)	279-293
Number of pages	15
Journal	Molecular Ecology
Volume	18
Issue number	2
DOIs	https://doi.org/10.1111/j.1365-294X.2008.04013.x
Publication status	Published - Jan 2009

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abstract = "A phylogeographical analysis of the scald pathogen Rhynchosporium secalis was conducted using nuclear DNA sequences from two neutral restriction fragment length polymorphism loci and the mating-type idiomorphs. Approximately 500 isolates sampled from more than 60 field populations from five continents were analysed to infer migration patterns and the demographic history of the fungus. Migration rates among continents were generally low, consistent with earlier reports of significant population subdivision among continents. Northern Europe was mainly a source population for global migration. We hypothesize that the pathogen only recently moved out of its centre of origin, resulting in founder populations that are reproductively isolated due to the contemporary absence of long-distance gene flow.",

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AB - A phylogeographical analysis of the scald pathogen Rhynchosporium secalis was conducted using nuclear DNA sequences from two neutral restriction fragment length polymorphism loci and the mating-type idiomorphs. Approximately 500 isolates sampled from more than 60 field populations from five continents were analysed to infer migration patterns and the demographic history of the fungus. Migration rates among continents were generally low, consistent with earlier reports of significant population subdivision among continents. Northern Europe was mainly a source population for global migration. We hypothesize that the pathogen only recently moved out of its centre of origin, resulting in founder populations that are reproductively isolated due to the contemporary absence of long-distance gene flow.

KW - Co-evolution

KW - Infectious diseases

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Phylogeographical analyses reveal global migration patterns of the barley scald pathogen Rhynchosporium secalis

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