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Climate-woodland effects on population genetics for two congeneric lichens with contrasting reproductive strategies. | LitMetric

Climate-woodland effects on population genetics for two congeneric lichens with contrasting reproductive strategies.

FEMS Microbiol Ecol

Royal Botanic Garden Edinburgh, 20A Inverleith Row, EH3 5LR, Edinburgh, UK.

Published: November 2018

AI Article Synopsis

  • Genetic variation in lichen fungi is influenced by their reproductive modes and environmental factors, which affect their ability to establish in different habitats.
  • The study examined two lichen species, one sexual (Nephroma laevigatum) and one asexual (N. parile), using microsatellite markers to assess genetic diversity and structure across a climatic gradient in Scotland.
  • Results showed high clonal presence in both species and indicated that woodland connectivity, not geographic distance, played a key role in their genetic diversity, suggesting that environmental factors are more significant than the differences in their reproductive strategies.

Article Abstract

Genetic variation is expected to be influenced by the interaction between reproductive mode and dispersal traits on the one hand and environmental and habitat setting affecting establishment success on the other. We evaluated how environmental/habitat setting affects population genetic variation (i.e. variation in genetic diversity and structure) when regulated by contrasting dispersal traits. We used fungus-specific microsatellite markers to examine genetic diversity and structure of two closely related epiphytic lichen fungi that differ in their primary reproductive mode: Nephroma laevigatum (sexually reproducing, n = 191, 10 microsatellites) and N. parile (asexually reproducing, n = 182, 12 microsatellites), along a steep climatic gradient in Scotland. Despite their reproductive differences, we found a high proportion of clones in both species and a background pattern of genetic structure related to climatic gradients. We also demonstrated that woodland connectivity, rather than geographic distance, explained genetic diversity in both species. Environmental/habitat setting, modulated by the reproductive mode of the species, affects genetic diversity and structure, but the putative dissimilarity in their reproductive mode is less important than has been previously assumed. We reinforce the importance of protecting highly connected populations, positioned along a gradient capturing the segregation of gene pool differences in response to climatic variation.

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Source
http://dx.doi.org/10.1093/femsec/fiy159DOI Listing

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