ArticleDevelopment (Cambridge, England)2024
Phylogenomic analysis of the Lake Kronotskoe species flock of Dolly Varden charr reveals genetic and developmental signatures of sympatric radiation.
Article in Development (Cambridge, England), 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed.
- Ambient Developmental Temperatures and Maternal Thyroid Supply Promote Early Life Diversification in Salmonids.Journal of experimental zoology. Part B, Molecular and developmental evolution · 2026Article
- Patterns of Evolutionary Diversification in a World-Significant Hotspot of Salmonid Diversity: A Study of LandlockedEcology and evolution · 2026Article
- Complete Mitochondrial Genomes of Endemic Charrs of Salvelinus: Implications for Taxonomy and Species Identification.Biochemical genetics · 2026Article
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Abstract
Recent adaptive radiations provide experimental opportunities to parse the relationship between genomic variation and the origins of distinct phenotypes. Sympatric radiations of the charr complex (genus Salvelinus) present a trove for phylogenetic analyses as charrs have repeatedly diversified into multiple morphs with distinct feeding specializations. However, charr species flocks normally comprise only two to three lineages. Dolly Varden charr inhabiting Lake Kronotskoe represent the most extensive radiation described for the genus, containing at least seven lineages, each with defining morphological and ecological traits. Here, we perform the first genome-wide analysis of this species flock to parse the foundations of adaptive change. Our data support distinct, reproductively isolated lineages within the clade. We find that changes in genes associated with thyroid signaling and craniofacial development provided a foundational shift in evolution to the lake. The thyroid axis is further implicated in subsequent lineage partitioning events. These results delineate a genetic scenario for the diversification of specialized lineages and highlight a common axis of change biasing the generation of specific forms during adaptive radiation.
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