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Divergent selection and heterogeneous migration rates across the range of Sitka spruce (Picea sitchensis)
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| Zeitschriftentitel: | Proceedings of the Royal Society B: Biological Sciences |
|---|---|
| Personen und Körperschaften: | , , |
| In: | Proceedings of the Royal Society B: Biological Sciences, 279, 2012, 1734, S. 1675-1683 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
The Royal Society
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| Schlagwörter: |
| author_facet |
Holliday, Jason A. Suren, Haktan Aitken, Sally N. Holliday, Jason A. Suren, Haktan Aitken, Sally N. |
|---|---|
| author |
Holliday, Jason A. Suren, Haktan Aitken, Sally N. |
| spellingShingle |
Holliday, Jason A. Suren, Haktan Aitken, Sally N. Proceedings of the Royal Society B: Biological Sciences Divergent selection and heterogeneous migration rates across the range of Sitka spruce (Picea sitchensis) General Agricultural and Biological Sciences General Environmental Science General Immunology and Microbiology General Biochemistry, Genetics and Molecular Biology General Medicine |
| author_sort |
holliday, jason a. |
| spelling |
Holliday, Jason A. Suren, Haktan Aitken, Sally N. 0962-8452 1471-2954 The Royal Society General Agricultural and Biological Sciences General Environmental Science General Immunology and Microbiology General Biochemistry, Genetics and Molecular Biology General Medicine http://dx.doi.org/10.1098/rspb.2011.1805 <jats:p>Gene flow and effective population size (<jats:italic>N</jats:italic><jats:sub>e</jats:sub>) should depend on a population's position within its range: those near the edges are expected to have smaller<jats:italic>N</jats:italic><jats:sub>e</jats:sub>and lower relative emigration rates, whereas those nearer the centre should have larger<jats:italic>N</jats:italic><jats:sub>e</jats:sub>and higher relative emigration rates. In species with continuous ranges, this phenomenon may limit the ability of peripheral populations to respond to divergent selection. Here, we employ Sitka spruce as a model to test these predictions. We previously genotyped 339 single nucleotide polymorphisms (SNPs) in 410 individuals from 13 populations, and used these data to identify putative targets of divergent selection, as well as to explore the extent to which central–peripheral structure may impede adaptation. Fourteen SNPs had outlier<jats:italic>F</jats:italic><jats:sub>ST</jats:sub>estimates suggestive of divergent selection, of which nine were previously associated with phenotypic variation in adaptive traits (timing of autumn budset and cold hardiness). Using coalescent simulations, we show that populations from near the centre of the range have higher effective populations sizes than those from the edges, and that central populations contribute more migrants to marginal populations than the reverse. Our results suggest that while divergent selection appears to have shaped allele frequencies among populations, asymmetrical movement of alleles from the centre to the edges of the species range may affect the adaptive capacity of peripheral populations. In southern peripheral populations, the movement of cold-adapted alleles from the north represents a significant impediment to adaptation under climate change, while in the north, movement of warm-adapted alleles from the south may enhance adaptation.</jats:p> Divergent selection and heterogeneous migration rates across the range of Sitka spruce (<i>Picea sitchensis</i>) Proceedings of the Royal Society B: Biological Sciences |
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| title |
Divergent selection and heterogeneous migration rates across the range of Sitka spruce (Picea sitchensis) |
| title_unstemmed |
Divergent selection and heterogeneous migration rates across the range of Sitka spruce (Picea sitchensis) |
| title_full |
Divergent selection and heterogeneous migration rates across the range of Sitka spruce (Picea sitchensis) |
| title_fullStr |
Divergent selection and heterogeneous migration rates across the range of Sitka spruce (Picea sitchensis) |
| title_full_unstemmed |
Divergent selection and heterogeneous migration rates across the range of Sitka spruce (Picea sitchensis) |
| title_short |
Divergent selection and heterogeneous migration rates across the range of Sitka spruce (Picea sitchensis) |
| title_sort |
divergent selection and heterogeneous migration rates across the range of sitka spruce (<i>picea sitchensis</i>) |
| topic |
General Agricultural and Biological Sciences General Environmental Science General Immunology and Microbiology General Biochemistry, Genetics and Molecular Biology General Medicine |
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http://dx.doi.org/10.1098/rspb.2011.1805 |
| publishDate |
2012 |
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1675-1683 |
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<jats:p>Gene flow and effective population size (<jats:italic>N</jats:italic><jats:sub>e</jats:sub>) should depend on a population's position within its range: those near the edges are expected to have smaller<jats:italic>N</jats:italic><jats:sub>e</jats:sub>and lower relative emigration rates, whereas those nearer the centre should have larger<jats:italic>N</jats:italic><jats:sub>e</jats:sub>and higher relative emigration rates. In species with continuous ranges, this phenomenon may limit the ability of peripheral populations to respond to divergent selection. Here, we employ Sitka spruce as a model to test these predictions. We previously genotyped 339 single nucleotide polymorphisms (SNPs) in 410 individuals from 13 populations, and used these data to identify putative targets of divergent selection, as well as to explore the extent to which central–peripheral structure may impede adaptation. Fourteen SNPs had outlier<jats:italic>F</jats:italic><jats:sub>ST</jats:sub>estimates suggestive of divergent selection, of which nine were previously associated with phenotypic variation in adaptive traits (timing of autumn budset and cold hardiness). Using coalescent simulations, we show that populations from near the centre of the range have higher effective populations sizes than those from the edges, and that central populations contribute more migrants to marginal populations than the reverse. Our results suggest that while divergent selection appears to have shaped allele frequencies among populations, asymmetrical movement of alleles from the centre to the edges of the species range may affect the adaptive capacity of peripheral populations. In southern peripheral populations, the movement of cold-adapted alleles from the north represents a significant impediment to adaptation under climate change, while in the north, movement of warm-adapted alleles from the south may enhance adaptation.</jats:p> |
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| author | Holliday, Jason A., Suren, Haktan, Aitken, Sally N. |
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| description | <jats:p>Gene flow and effective population size (<jats:italic>N</jats:italic><jats:sub>e</jats:sub>) should depend on a population's position within its range: those near the edges are expected to have smaller<jats:italic>N</jats:italic><jats:sub>e</jats:sub>and lower relative emigration rates, whereas those nearer the centre should have larger<jats:italic>N</jats:italic><jats:sub>e</jats:sub>and higher relative emigration rates. In species with continuous ranges, this phenomenon may limit the ability of peripheral populations to respond to divergent selection. Here, we employ Sitka spruce as a model to test these predictions. We previously genotyped 339 single nucleotide polymorphisms (SNPs) in 410 individuals from 13 populations, and used these data to identify putative targets of divergent selection, as well as to explore the extent to which central–peripheral structure may impede adaptation. Fourteen SNPs had outlier<jats:italic>F</jats:italic><jats:sub>ST</jats:sub>estimates suggestive of divergent selection, of which nine were previously associated with phenotypic variation in adaptive traits (timing of autumn budset and cold hardiness). Using coalescent simulations, we show that populations from near the centre of the range have higher effective populations sizes than those from the edges, and that central populations contribute more migrants to marginal populations than the reverse. Our results suggest that while divergent selection appears to have shaped allele frequencies among populations, asymmetrical movement of alleles from the centre to the edges of the species range may affect the adaptive capacity of peripheral populations. In southern peripheral populations, the movement of cold-adapted alleles from the north represents a significant impediment to adaptation under climate change, while in the north, movement of warm-adapted alleles from the south may enhance adaptation.</jats:p> |
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| spelling | Holliday, Jason A. Suren, Haktan Aitken, Sally N. 0962-8452 1471-2954 The Royal Society General Agricultural and Biological Sciences General Environmental Science General Immunology and Microbiology General Biochemistry, Genetics and Molecular Biology General Medicine http://dx.doi.org/10.1098/rspb.2011.1805 <jats:p>Gene flow and effective population size (<jats:italic>N</jats:italic><jats:sub>e</jats:sub>) should depend on a population's position within its range: those near the edges are expected to have smaller<jats:italic>N</jats:italic><jats:sub>e</jats:sub>and lower relative emigration rates, whereas those nearer the centre should have larger<jats:italic>N</jats:italic><jats:sub>e</jats:sub>and higher relative emigration rates. In species with continuous ranges, this phenomenon may limit the ability of peripheral populations to respond to divergent selection. Here, we employ Sitka spruce as a model to test these predictions. We previously genotyped 339 single nucleotide polymorphisms (SNPs) in 410 individuals from 13 populations, and used these data to identify putative targets of divergent selection, as well as to explore the extent to which central–peripheral structure may impede adaptation. Fourteen SNPs had outlier<jats:italic>F</jats:italic><jats:sub>ST</jats:sub>estimates suggestive of divergent selection, of which nine were previously associated with phenotypic variation in adaptive traits (timing of autumn budset and cold hardiness). Using coalescent simulations, we show that populations from near the centre of the range have higher effective populations sizes than those from the edges, and that central populations contribute more migrants to marginal populations than the reverse. Our results suggest that while divergent selection appears to have shaped allele frequencies among populations, asymmetrical movement of alleles from the centre to the edges of the species range may affect the adaptive capacity of peripheral populations. In southern peripheral populations, the movement of cold-adapted alleles from the north represents a significant impediment to adaptation under climate change, while in the north, movement of warm-adapted alleles from the south may enhance adaptation.</jats:p> Divergent selection and heterogeneous migration rates across the range of Sitka spruce (<i>Picea sitchensis</i>) Proceedings of the Royal Society B: Biological Sciences |
| spellingShingle | Holliday, Jason A., Suren, Haktan, Aitken, Sally N., Proceedings of the Royal Society B: Biological Sciences, Divergent selection and heterogeneous migration rates across the range of Sitka spruce (Picea sitchensis), General Agricultural and Biological Sciences, General Environmental Science, General Immunology and Microbiology, General Biochemistry, Genetics and Molecular Biology, General Medicine |
| title | Divergent selection and heterogeneous migration rates across the range of Sitka spruce (Picea sitchensis) |
| title_full | Divergent selection and heterogeneous migration rates across the range of Sitka spruce (Picea sitchensis) |
| title_fullStr | Divergent selection and heterogeneous migration rates across the range of Sitka spruce (Picea sitchensis) |
| title_full_unstemmed | Divergent selection and heterogeneous migration rates across the range of Sitka spruce (Picea sitchensis) |
| title_short | Divergent selection and heterogeneous migration rates across the range of Sitka spruce (Picea sitchensis) |
| title_sort | divergent selection and heterogeneous migration rates across the range of sitka spruce (<i>picea sitchensis</i>) |
| title_unstemmed | Divergent selection and heterogeneous migration rates across the range of Sitka spruce (Picea sitchensis) |
| topic | General Agricultural and Biological Sciences, General Environmental Science, General Immunology and Microbiology, General Biochemistry, Genetics and Molecular Biology, General Medicine |
| url | http://dx.doi.org/10.1098/rspb.2011.1805 |