Evolutionary Applications · 2017 · published online on October 27, 2016

Ancestry and adaptive evolution of anadromous, resident, and adfluvial rainbow trout (Oncorhynchus mykiss) in the San Francisco bay area: application of adaptive genomic variation to conservation in a highly impacted landscape

Leitwein M, Garza JC, Pearse DE

Around San Francisco Bay, the authors compare the ancestry and adaptive variation of rainbow trout populations living on either side of migration barriers. The results relate ecological context, population history and migratory traits, with implications for habitat restoration.

The question: How are barriers and new habitats associated with genomic differences between migratory and resident populations?
The approach: Comparisons of genetic structure, ancestry and variants associated with migratory traits across several watersheds.
What the article brings: Adaptive differences accompany the contexts above and below dams; the populations keep a native coastal ancestry.
The limits: The conclusions apply to the populations studied around San Francisco Bay; they do not prove the effect of each structure elsewhere.

Figures from the article

Figure 1, Ancestry and adaptive evolution of anadromous, resident, and adfluvial rainbow trout (Oncorhynchus mykiss) in the San Francisco bay area: application of adaptive genomic variation to conservation in a highly impacted landscape — Figure 1. Map showing locations of population samples around San Francisco Bay. Sample sites are indicated by numbered triangles, and migration barriers are shown by bars, with sites above reservoir‐forming dams indicated by dots with size proportional to reservoir volume.Original caption. Leitwein M, Garza JC, Pearse DE (2017), Evolutionary Applications. CC BY 4.0

Figure 3, Ancestry and adaptive evolution of anadromous, resident, and adfluvial rainbow trout (Oncorhynchus mykiss) in the San Francisco bay area: application of adaptive genomic variation to conservation in a highly impacted landscape — Figure 3. Principal component analysis showing relative genetic distances between individuals with coastal, San Francisco(SF) Bay Area, Central Valley, and hatchery trout strain ancestryOriginal caption. Leitwein M, Garza JC, Pearse DE (2017), Evolutionary Applications. CC BY 4.0

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Ancestry and adaptive evolution of anadromous, resident, and adfluvial rainbow trout (Oncorhynchus mykiss) in the San Francisco bay area: application of adaptive genomic variation to conservation in a highly impacted landscape

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