Recent introgression between Taiga Bean Goose and Tundra Bean Goose results in a largely homogeneous landscape of genetic differentiation
Several studies have uncovered a highly heterogeneous landscape of genetic differentiation across the genomes of closely related species. Specifically, genetic differentiation is often concentrated in particular genomic regions ("islands of differentiation") that might contain barrier loci...
Published in: | Heredity |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Uppsala universitet, Evolutionsbiologi
2020
|
Subjects: | |
Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-423716 https://doi.org/10.1038/s41437-020-0322-z |
id |
ftuppsalauniv:oai:DiVA.org:uu-423716 |
---|---|
record_format |
openpolar |
spelling |
ftuppsalauniv:oai:DiVA.org:uu-423716 2023-05-15T13:30:10+02:00 Recent introgression between Taiga Bean Goose and Tundra Bean Goose results in a largely homogeneous landscape of genetic differentiation Ottenburghs, Jente Honka, Johanna Musken, Gerard J. D. M. Ellegren, Hans 2020 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-423716 https://doi.org/10.1038/s41437-020-0322-z eng eng Uppsala universitet, Evolutionsbiologi Univ Oulu, Dept Ecol & Genet, POB 3000, FI-90014 Oulu, Finland. Wageningen Univ & Res, Wageningen Environm Res, Team Anim Ecol, Droevendaalsesteeg 3-3A, NL-6708 PB Wageningen, Netherlands. NATURE PUBLISHING GROUP Heredity, 0018-067X, 2020, 125:1-2, s. 73-84 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-423716 doi:10.1038/s41437-020-0322-z PMID 32451423 ISI:000535445800001 info:eu-repo/semantics/openAccess Evolutionary Biology Evolutionsbiologi Genetics Genetik Article in journal info:eu-repo/semantics/article text 2020 ftuppsalauniv https://doi.org/10.1038/s41437-020-0322-z 2023-02-23T21:53:45Z Several studies have uncovered a highly heterogeneous landscape of genetic differentiation across the genomes of closely related species. Specifically, genetic differentiation is often concentrated in particular genomic regions ("islands of differentiation") that might contain barrier loci contributing to reproductive isolation, whereas the rest of the genome is homogenized by introgression. Alternatively, linked selection can produce differentiation islands in allopatry without introgression. We explored the influence of introgression on the landscape of genetic differentiation in two hybridizing goose taxa: the Taiga Bean Goose (Anser fabalis) and the Tundra Bean Goose (A. serrirostris). We re-sequenced the whole genomes of 18 individuals (9 of each taxon) and, using a combination of population genomic summary statistics and demographic modeling, we reconstructed the evolutionary history of these birds. Next, we quantified the impact of introgression on the build-up and maintenance of genetic differentiation. We found evidence for a scenario of allopatric divergence (about 2.5 million years ago) followed by recent secondary contact (about 60,000 years ago). Subsequent introgression events led to high levels of gene flow, mainly from the Tundra Bean Goose into the Taiga Bean Goose. This scenario resulted in a largely undifferentiated genomic landscape (genome-wide F-ST = 0.033) with a few notable differentiation peaks that were scattered across chromosomes. The summary statistics indicated that some peaks might contain barrier loci while others arose in allopatry through linked selection. Finally, based on the low genetic differentiation, considerable morphological variation and incomplete reproductive isolation, we argue that the Taiga and the Tundra Bean Goose should be treated as subspecies. Article in Journal/Newspaper Anser fabalis taiga Tundra Uppsala University: Publications (DiVA) Heredity 125 1-2 73 84 |
institution |
Open Polar |
collection |
Uppsala University: Publications (DiVA) |
op_collection_id |
ftuppsalauniv |
language |
English |
topic |
Evolutionary Biology Evolutionsbiologi Genetics Genetik |
spellingShingle |
Evolutionary Biology Evolutionsbiologi Genetics Genetik Ottenburghs, Jente Honka, Johanna Musken, Gerard J. D. M. Ellegren, Hans Recent introgression between Taiga Bean Goose and Tundra Bean Goose results in a largely homogeneous landscape of genetic differentiation |
topic_facet |
Evolutionary Biology Evolutionsbiologi Genetics Genetik |
description |
Several studies have uncovered a highly heterogeneous landscape of genetic differentiation across the genomes of closely related species. Specifically, genetic differentiation is often concentrated in particular genomic regions ("islands of differentiation") that might contain barrier loci contributing to reproductive isolation, whereas the rest of the genome is homogenized by introgression. Alternatively, linked selection can produce differentiation islands in allopatry without introgression. We explored the influence of introgression on the landscape of genetic differentiation in two hybridizing goose taxa: the Taiga Bean Goose (Anser fabalis) and the Tundra Bean Goose (A. serrirostris). We re-sequenced the whole genomes of 18 individuals (9 of each taxon) and, using a combination of population genomic summary statistics and demographic modeling, we reconstructed the evolutionary history of these birds. Next, we quantified the impact of introgression on the build-up and maintenance of genetic differentiation. We found evidence for a scenario of allopatric divergence (about 2.5 million years ago) followed by recent secondary contact (about 60,000 years ago). Subsequent introgression events led to high levels of gene flow, mainly from the Tundra Bean Goose into the Taiga Bean Goose. This scenario resulted in a largely undifferentiated genomic landscape (genome-wide F-ST = 0.033) with a few notable differentiation peaks that were scattered across chromosomes. The summary statistics indicated that some peaks might contain barrier loci while others arose in allopatry through linked selection. Finally, based on the low genetic differentiation, considerable morphological variation and incomplete reproductive isolation, we argue that the Taiga and the Tundra Bean Goose should be treated as subspecies. |
format |
Article in Journal/Newspaper |
author |
Ottenburghs, Jente Honka, Johanna Musken, Gerard J. D. M. Ellegren, Hans |
author_facet |
Ottenburghs, Jente Honka, Johanna Musken, Gerard J. D. M. Ellegren, Hans |
author_sort |
Ottenburghs, Jente |
title |
Recent introgression between Taiga Bean Goose and Tundra Bean Goose results in a largely homogeneous landscape of genetic differentiation |
title_short |
Recent introgression between Taiga Bean Goose and Tundra Bean Goose results in a largely homogeneous landscape of genetic differentiation |
title_full |
Recent introgression between Taiga Bean Goose and Tundra Bean Goose results in a largely homogeneous landscape of genetic differentiation |
title_fullStr |
Recent introgression between Taiga Bean Goose and Tundra Bean Goose results in a largely homogeneous landscape of genetic differentiation |
title_full_unstemmed |
Recent introgression between Taiga Bean Goose and Tundra Bean Goose results in a largely homogeneous landscape of genetic differentiation |
title_sort |
recent introgression between taiga bean goose and tundra bean goose results in a largely homogeneous landscape of genetic differentiation |
publisher |
Uppsala universitet, Evolutionsbiologi |
publishDate |
2020 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-423716 https://doi.org/10.1038/s41437-020-0322-z |
genre |
Anser fabalis taiga Tundra |
genre_facet |
Anser fabalis taiga Tundra |
op_relation |
Heredity, 0018-067X, 2020, 125:1-2, s. 73-84 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-423716 doi:10.1038/s41437-020-0322-z PMID 32451423 ISI:000535445800001 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41437-020-0322-z |
container_title |
Heredity |
container_volume |
125 |
container_issue |
1-2 |
container_start_page |
73 |
op_container_end_page |
84 |
_version_ |
1766005870571814912 |