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Genetic Analyses of Discrete Geographic Samples of a Golden Chanterelle in Canada Reveal Evidence for Recent Regional Differentiation

Summary

Researchers studied the genetic makeup of golden chanterelle mushrooms found in different regions of Canada. They discovered that mushroom populations in Newfoundland and Ontario share some genetic similarities but have developed distinct regional differences over time. The findings suggest these populations originated from a common ancestor following the last ice age and have since diverged through natural genetic changes and adaptation to local environments.

Background

Cantharellus enelensis is a recently described species of golden chanterelle found in eastern North America and is a popular edible mushroom. The genetic diversity and population structure of this species were previously unknown, making it an ideal subject for population genetic studies.

Objective

This study aimed to analyze genetic diversity and population structure of C. enelensis across discrete geographic regions in Canada. The research examined three regions: eastern and western Newfoundland and Labrador, and Hamilton, Ontario, to understand local and regional differentiation patterns.

Results

Twenty-eight multilocus genotypes (MLGs) were identified among the 230 specimens, with 2 MLGs shared among all three regions and regional-specific genotypes present. Genetic differentiation was significant at both regional and local levels, with 16% and 32% of variance attributed to regional and local separation respectively, suggesting recent divergence from a common ancestral population.

Conclusion

The three regional populations of C. enelensis likely colonized from a common refugium after the last ice age approximately 10,000 years ago and are currently diverging through mutation, drift, and selection. Evidence for heterozygote advantage and a likely heterothallic mating system was detected across all three regional populations.
  • Published in:Genes (Basel),
  • Study Type:Population Genetic Study,
  • Source: PMID: 35885893, DOI: 10.3390/genes13071110
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