Genetic variation and population differentiation in the lichen-forming ascomycete Xanthoria parietina on the island Storfosna, central Norway

Molecular Ecology
Louise Lindblom, Stefan Ekman

Abstract

Genetic diversity and fine-scale population structure in the lichen-forming ascomycete Xanthoria parietina was investigated using sequence variation in part of the intergenic spacer (IGS) and the complete internal transcribed spacer (ITS) regions of the nuclear ribosomal DNA. Sampling included 213 and 225 individuals, respectively, from seven populations in two different habitats, bark and rock, on the island Storfosna off the central west coast of Norway. Both markers revealed significant variation and a total of 10 IGS and 16 ITS haplotypes were found. There were no signs of significant positive spatial autocorrelation at any spatial size class down to 10% of transect length, nor did we find significant deviations from neutrality or signs of historical population expansion. Analysis of molecular variance (amova) indicated that most of the genetic variance observed was within populations, but when populations were grouped according to habitat, more than a quarter of the variance was explained among groups. Pairwise comparisons of populations (F(ST), exact tests of population differentiation) revealed significant differentiation between populations in different habitats (on bark or rock), but not between populations in the same...Continue Reading

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Nov 4, 2011·Molecular Plant-microbe Interactions : MPMI·Silke Werth, Christoph Scheidegger
Jun 6, 2012·TheScientificWorldJournal·Ester WickertEliana Gertrudes de Macedo Lemos
Jun 28, 2007·Molecular Ecology·Silke WerthChristoph Scheidegger
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May 1, 2008·American Journal of Botany·Silke Werth, Victoria L Sork
Apr 3, 2021·Scientific Reports·Silke WerthChristoph Scheidegger

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