期刊
ECOLOGY AND EVOLUTION
卷 11, 期 6, 页码 2616-2629出版社
WILEY
DOI: 10.1002/ece3.7219
关键词
divergence; F; (ST); genetics; phylogeography; speciation
资金
- Icelandic Centre for Research [141302-051, 196417-051]
Buccinum undatum, a subtidal gastropod in the North Atlantic, shows clear spatial genetic structure with high differentiation between Canadian and European populations, and weak but significant genetic structuring within Iceland, the Faroe Islands, and England. Genetic structure in Iceland is correlated with shell shape and color frequency, making this species a promising model for future genome-wide association studies.
Buccinum undatum is a subtidal gastropod that exhibits clear spatial variation in several phenotypic shell traits (color, shape, and thickness) across its North Atlantic distribution. Studies of spatial phenotypic variation exist for the species; however, population genetic studies have thus far relied on a limited set of mitochondrial and microsatellite markers. Here, we greatly expand on previous work by characterizing population genetic structure in B. undatum across the North Atlantic from SNP variation obtained by RAD sequencing. There was a high degree of genetic differentiation between Canadian and European populations (Iceland, Faroe Islands, and England) consistent with the divergence of populations in allopatry (F-ST > 0.57 for all pairwise comparisons). In addition, B. undatum populations within Iceland, the Faroe Islands, and England are typified by weak but significant genetic structuring following an isolation-by-distance model. Finally, we established a significant correlation between genetic structuring in Iceland and two phenotypic traits: shell shape and color frequency. The works detailed here enhance our understanding of genetic structuring in B. undatum and establish the species as an intriguing model for future genome-wide association studies.
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