High intercontinental migration rates and population admixture in the sapstain fungus Ophiostoma ips

dc.contributor.authorZhou, Xudong
dc.contributor.authorBurgess, Treena I.
dc.contributor.authorDe Beer, Z. Wilhelm
dc.contributor.authorLieutier, Francois
dc.contributor.authorYart, Annie
dc.contributor.authorKlepzig, Kier
dc.contributor.authorCarnegie, Angus J.
dc.contributor.authorPortales, Julio Mena
dc.contributor.authorWingfield, Brenda D.
dc.contributor.authorWingfield, Michael J.
dc.contributor.emailxu.zhou@up.ac.zaen
dc.date.accessioned2007-06-04T06:22:56Z
dc.date.available2007-06-04T06:22:56Z
dc.date.issued2007-01
dc.description.abstractOphiostoma ips is a common fungal associate of various conifer-infesting bark beetles in their native ranges and has been introduced into non-native pine plantations in the Southern Hemisphere. In this study, we used 10 microsatellite markers to investigate the population biology of O. ips in native (Cuba, France, Morocco and USA) and non-native (Australia, Chile and South Africa) areas to characterize host specificity, reproductive behaviour, and the potential origin as well as patterns of spread of the fungus and its insect vectors. The markers resolved a total of 41 alleles and 75 haplotypes. Higher genetic diversity was found in the native populations than in the introduced populations. Based on the origin of the insect vectors, the populations of O. ips in Australia would be expected to reflect a North American origin, and those in Chile and South Africa to reflect a European origin. However, most alleles observed in the native European population were also found in the native North American population; only the allele frequencies among the populations varied. This admixture made it impossible to confirm the origin of the introduced Southern Hemisphere (SH) populations of O. ips. There was also no evidence for specificity of the fungus to particular bark beetle vectors or hosts. Although O. ips is thought to be mainly self-fertilizing, evidence for recombination was found in the four native populations surveyed. The higher genetic diversity in the North American than in the European population suggests that North America could be the possible source region of O. ips.en
dc.description.sponsorshipWe thank the National Research Foundation (NRF), members of the Tree Protection Co-operative Programme (TPCP) and the THRIP initiative of the Department of Trade and Industry, South Africa, for financial support. We acknowledge Sappi for a fellowship awarded to the first author.en
dc.format.extent422281 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.citationZhou, X, Burgess, TI, De Beer, W, Lieutier, F, Yart, A, Klepzig, K, Carnegie, A, Portales, JM, Wingfield, BD & Wingfield, MJ 2007, ‘High intercontinental migration rates and population admixture in the sapstain fungus Ophiostoma ips’, Molecular Ecology, Vol.16, Issue 1, pp. 89-99 [http://www.blackwell-synergy.comen
dc.identifier.issn1365-294X
dc.identifier.other10.1111/j.1365-294X.2006.03127.x
dc.identifier.urihttp://hdl.handle.net/2263/2608
dc.language.isoenen
dc.publisherBlackwellen
dc.rightsBlackwellen
dc.subjectMigration ratesen
dc.subject.lcshOphiostoma
dc.subject.lcshMolecular ecology
dc.subject.lcshInsect-fungus relationships
dc.subject.lcshFungi -- Ecology
dc.subject.lcshAnimals as carriers of disease
dc.subject.lcshBeetles
dc.subject.lcshBark-weevil
dc.subject.lcshPlantations
dc.titleHigh intercontinental migration rates and population admixture in the sapstain fungus Ophiostoma ipsen
dc.typePostprint Articleen

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