VETTRAINO, Annamaria; BRASIER, Clive M.; WEBBER, Joan F.; HANSEN, Everett M.; GREEN, Sarah; ROBIN, Cécile; TOMASSINI, Alessia; BRUNI, Natalia; VANNINI, Andrea

doi:10.1016/j.funbio.2016.10.002

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VETTRAINO, Annamaria
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BRASIER, Clive M.
Forest Research, Alice Holt Lodge

WEBBER, Joan F.
Forest Research, Alice Holt Lodge

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Fungal Biology. 2017, vol. 121, n° 2, p. 112-126

Elsevier

Résumé en anglais

Following recent discovery of Phytophthora lateralis on native Chamaecyparis obtusa in Taiwan, four phenotypically distinct lineages were discriminated: the Taiwan J (TWJ) and Taiwan K (TWK) in Taiwan, the Pacific Northwest (PNW) in North America and Europe and the UK in west Scotland. Across the four lineages, we analysed 88 isolates from multiple sites for microsatellite diversity. Twenty-one multilocus genotypes (MLGs) were resolved with high levels of diversity of the TWK and PNW lineages. No alleles were shared between the PNW and the Taiwanese lineages. TWK was heterozygous at three loci, whereas TWJ isolates were homozygous apart from one isolate, which exhibited a unique allele also present in the TWK lineage. PNW lineage was heterozygous at three loci. The evidence suggests its origin may be a yet unknown Asian source. North American and European PNW isolates shared all their alleles and also a dominant MLG, consistent with a previous proposal that this lineage is a recent introduction into Europe from North America. The UK lineage was monomorphic and homozygous at all loci. It shared its alleles with the PNW and the TWJ and TWK lineages, hence a possible origin in a recent hybridisation event between a Taiwan lineage and PNW cannot be ruled out.< Réduire

Mots clés

phytophthora lateralis

chamaecyparis

taïwan

amérique du nord

europe

microsatellite

génotype multilocus

expression des gènes

hybridation

Mots clés en anglais

genetic variation

hybridization

introduction

evolution

microsatellite analysis

microsatellites

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Contrasting microsatellite diversity in the evolutionary lineages of Phytophthora lateralis

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