Selection at Work in Self-Incompatible Arabidopsis lyrata . II. Spatial Distribution of S Haplotypes in Iceland
Abstract We survey the distribution of haplotypes at the self-incompatibility (SI) locus of Arabidopsis lyrata (Brassicaceae) at 12 locations spread over the species' natural distribution in Iceland. Previous investigations of the system have identified 34 functionally different S haplotypes ma...
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2008
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Online Access: | http://dx.doi.org/10.1534/genetics.108.088799 https://academic.oup.com/genetics/article-pdf/180/2/1051/46795777/genetics1051.pdf |
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croxfordunivpr:10.1534/genetics.108.088799 2023-10-01T03:56:53+02:00 Selection at Work in Self-Incompatible Arabidopsis lyrata . II. Spatial Distribution of S Haplotypes in Iceland Schierup, Mikkel H Bechsgaard, Jesper S Christiansen, Freddy B 2008 http://dx.doi.org/10.1534/genetics.108.088799 https://academic.oup.com/genetics/article-pdf/180/2/1051/46795777/genetics1051.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model Genetics volume 180, issue 2, page 1051-1059 ISSN 1943-2631 Genetics journal-article 2008 croxfordunivpr https://doi.org/10.1534/genetics.108.088799 2023-09-01T10:59:58Z Abstract We survey the distribution of haplotypes at the self-incompatibility (SI) locus of Arabidopsis lyrata (Brassicaceae) at 12 locations spread over the species' natural distribution in Iceland. Previous investigations of the system have identified 34 functionally different S haplotypes maintained by frequency-dependent selection and arranged them into four classes of dominance in their phenotypic expression. On the basis of this model of dominance and the island model of population subdivision, we compare the distribution of S haplotypes with that expected from population genetic theory. We observe 18 different S haplotypes, recessive haplotypes being more common than dominant ones, and dominant ones being shared by fewer populations. As expected, differentiation, although significant, is very low at the S locus even over distances of up to 300 km. The frequency of the most recessive haplotype is slightly larger than expected for a panmictic population, but consistent with a subdivided population with the observed differentiation. Frequencies in nature reflect effects of segregation distortion previously observed in controlled crosses. The dynamics of the S-locus variation are, however, well represented by a 12-island model and our simplified model of dominance interactions. Article in Journal/Newspaper Iceland Oxford University Press (via Crossref) Genetics 180 2 1051 1059 |
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Oxford University Press (via Crossref) |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Genetics |
spellingShingle |
Genetics Schierup, Mikkel H Bechsgaard, Jesper S Christiansen, Freddy B Selection at Work in Self-Incompatible Arabidopsis lyrata . II. Spatial Distribution of S Haplotypes in Iceland |
topic_facet |
Genetics |
description |
Abstract We survey the distribution of haplotypes at the self-incompatibility (SI) locus of Arabidopsis lyrata (Brassicaceae) at 12 locations spread over the species' natural distribution in Iceland. Previous investigations of the system have identified 34 functionally different S haplotypes maintained by frequency-dependent selection and arranged them into four classes of dominance in their phenotypic expression. On the basis of this model of dominance and the island model of population subdivision, we compare the distribution of S haplotypes with that expected from population genetic theory. We observe 18 different S haplotypes, recessive haplotypes being more common than dominant ones, and dominant ones being shared by fewer populations. As expected, differentiation, although significant, is very low at the S locus even over distances of up to 300 km. The frequency of the most recessive haplotype is slightly larger than expected for a panmictic population, but consistent with a subdivided population with the observed differentiation. Frequencies in nature reflect effects of segregation distortion previously observed in controlled crosses. The dynamics of the S-locus variation are, however, well represented by a 12-island model and our simplified model of dominance interactions. |
format |
Article in Journal/Newspaper |
author |
Schierup, Mikkel H Bechsgaard, Jesper S Christiansen, Freddy B |
author_facet |
Schierup, Mikkel H Bechsgaard, Jesper S Christiansen, Freddy B |
author_sort |
Schierup, Mikkel H |
title |
Selection at Work in Self-Incompatible Arabidopsis lyrata . II. Spatial Distribution of S Haplotypes in Iceland |
title_short |
Selection at Work in Self-Incompatible Arabidopsis lyrata . II. Spatial Distribution of S Haplotypes in Iceland |
title_full |
Selection at Work in Self-Incompatible Arabidopsis lyrata . II. Spatial Distribution of S Haplotypes in Iceland |
title_fullStr |
Selection at Work in Self-Incompatible Arabidopsis lyrata . II. Spatial Distribution of S Haplotypes in Iceland |
title_full_unstemmed |
Selection at Work in Self-Incompatible Arabidopsis lyrata . II. Spatial Distribution of S Haplotypes in Iceland |
title_sort |
selection at work in self-incompatible arabidopsis lyrata . ii. spatial distribution of s haplotypes in iceland |
publisher |
Oxford University Press (OUP) |
publishDate |
2008 |
url |
http://dx.doi.org/10.1534/genetics.108.088799 https://academic.oup.com/genetics/article-pdf/180/2/1051/46795777/genetics1051.pdf |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Genetics volume 180, issue 2, page 1051-1059 ISSN 1943-2631 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1534/genetics.108.088799 |
container_title |
Genetics |
container_volume |
180 |
container_issue |
2 |
container_start_page |
1051 |
op_container_end_page |
1059 |
_version_ |
1778527533834174464 |