Recent Adaptation in a Threatened Salmonid Revealed by Museum Genomics.
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| Autores principales: | , , , , , , , , |
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| Formato: | Artículo científico |
| Lenguaje: | en |
| Publicado: |
Molecular ecology
2025
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| _version_ | 1868266157483491330 |
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| author | Sharo, Andrew G Supple, Megan A Cabrera, Randy Seligmann, William E Sacco, Samuel Columbus, Cassondra D Pearse, Devon E Shapiro, Beth Garza, John Carlos |
| author_facet | Sharo, Andrew G Supple, Megan A Cabrera, Randy Seligmann, William E Sacco, Samuel Columbus, Cassondra D Pearse, Devon E Shapiro, Beth Garza, John Carlos Sharo, Andrew G Supple, Megan A Cabrera, Randy Seligmann, William E Sacco, Samuel Columbus, Cassondra D Pearse, Devon E Shapiro, Beth Garza, John Carlos |
| collection | PubMed - marine biology |
| contents | Recent Adaptation in a Threatened Salmonid Revealed by Museum Genomics. Sharo, Andrew G Supple, Megan A Cabrera, Randy Seligmann, William E Sacco, Samuel Columbus, Cassondra D Pearse, Devon E Shapiro, Beth Garza, John Carlos Animals Oncorhynchus mykiss Genomics Haplotypes Genetics, Population Museums Endangered Species Animal Migration Adaptation, Physiological California Steelhead/rainbow trout (Oncorhynchus mykiss) is an imperilled salmonid with two main life history strategies: migrate to the ocean or remain in freshwater. Domesticated hatchery forms of this species have been stocked into almost all California waterways, possibly resulting in introgression into natural populations and altered population structure. We compared whole-genome sequence data from contemporary populations against a set of museum population samples of steelhead from the same locations that were collected prior to most hatchery stocking. We observed minimal introgression and few steelhead-hatchery trout hybrids despite a century of extensive stocking. Our historical data show signals of introgression with a sister species and indications of an early hatchery facility. Finally, we found that migration-associated haplotypes have become less frequent over time, a likely adaptation to decreased opportunities for migration. Since contemporary migration-associated haplotype frequencies have been used to guide species management, we consider this to be a rare example of shifting baseline syndrome that has been validated with historical data. We suggest cautious optimism that a century of hatchery stocking has had minimal impact on California steelhead population genetic structure, but we note that continued shifts in life history may lead to further declines in the ocean-going form of the species. |
| format | Artículo científico |
| id | pubmed_40891211 |
| institution | PubMed |
| language | en |
| publishDate | 2025 |
| publisher | Molecular ecology |
| record_format | pubmed |
| spellingShingle | Recent Adaptation in a Threatened Salmonid Revealed by Museum Genomics. Sharo, Andrew G Supple, Megan A Cabrera, Randy Seligmann, William E Sacco, Samuel Columbus, Cassondra D Pearse, Devon E Shapiro, Beth Garza, John Carlos Animals Oncorhynchus mykiss Genomics Haplotypes Genetics, Population Museums Endangered Species Animal Migration Adaptation, Physiological California Recent Adaptation in a Threatened Salmonid Revealed by Museum Genomics. Sharo, Andrew G Supple, Megan A Cabrera, Randy Seligmann, William E Sacco, Samuel Columbus, Cassondra D Pearse, Devon E Shapiro, Beth Garza, John Carlos Animals Oncorhynchus mykiss Genomics Haplotypes Genetics, Population Museums Endangered Species Animal Migration Adaptation, Physiological California Steelhead/rainbow trout (Oncorhynchus mykiss) is an imperilled salmonid with two main life history strategies: migrate to the ocean or remain in freshwater. Domesticated hatchery forms of this species have been stocked into almost all California waterways, possibly resulting in introgression into natural populations and altered population structure. We compared whole-genome sequence data from contemporary populations against a set of museum population samples of steelhead from the same locations that were collected prior to most hatchery stocking. We observed minimal introgression and few steelhead-hatchery trout hybrids despite a century of extensive stocking. Our historical data show signals of introgression with a sister species and indications of an early hatchery facility. Finally, we found that migration-associated haplotypes have become less frequent over time, a likely adaptation to decreased opportunities for migration. Since contemporary migration-associated haplotype frequencies have been used to guide species management, we consider this to be a rare example of shifting baseline syndrome that has been validated with historical data. We suggest cautious optimism that a century of hatchery stocking has had minimal impact on California steelhead population genetic structure, but we note that continued shifts in life history may lead to further declines in the ocean-going form of the species. |
| title | Recent Adaptation in a Threatened Salmonid Revealed by Museum Genomics. |
| topic | Animals Oncorhynchus mykiss Genomics Haplotypes Genetics, Population Museums Endangered Species Animal Migration Adaptation, Physiological California |
| url | https://pubmed.ncbi.nlm.nih.gov/40891211/ |