Crossing species boundaries : the hybrid histories of the true geese
Hybridization, the interbreeding of different species, is a common phenomenon in birds: about 16% of bird species is known to have hybridized with at least one other species. Numerous avian hybrid zones have been studied from a morphological or genetic perspective, often documenting the interspecifi...
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Wageningen University
2016
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Online Access: | https://research.wur.nl/en/publications/crossing-species-boundaries-the-hybrid-histories-of-the-true-gees https://doi.org/10.18174/393256 |
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ftunivwagenin:oai:library.wur.nl:wurpubs/510327 2024-02-11T10:09:15+01:00 Crossing species boundaries : the hybrid histories of the true geese Ottenburghs, Jente Prins, Herbert Ydenburg, R.C. Megens, Hendrik-Jan 2016 application/pdf https://research.wur.nl/en/publications/crossing-species-boundaries-the-hybrid-histories-of-the-true-gees https://doi.org/10.18174/393256 en eng Wageningen University https://edepot.wur.nl/393256 https://research.wur.nl/en/publications/crossing-species-boundaries-the-hybrid-histories-of-the-true-gees doi:10.18174/393256 Wageningen University & Research anser crossing geese hybridization phylogenomics speciation species ganzen hybridisatie kruisen phylogenomica soorten soortvorming Doctoral thesis 2016 ftunivwagenin https://doi.org/10.18174/393256 2024-01-24T23:17:53Z Hybridization, the interbreeding of different species, is a common phenomenon in birds: about 16% of bird species is known to have hybridized with at least one other species. Numerous avian hybrid zones have been studied from a morphological or genetic perspective, often documenting the interspecific exchange of genetic material by hybridization and backcrossing (i.e. introgression). The incidence of hybridization varies among bird orders with the Anseriformes (waterfowl: ducks, geese and swans) showing the highest propensity to hybridize. In this thesis, I provide a genomic perspective on the role of hybridization in the evolutionary history of one particular anseriform tribe, the Anserini or “True Geese”, which comprises 17 species divided over two genera: Anser and Branta . The diversification of this bird group took place in the late Pliocene and the early Pleistocene (between four and two million years ago), conceivably driven by a global cooling trend that led to the establishment of a circumpolar tundra belt and the emergence of temperate grasslands. Most species show a steady population increase during this period, followed by population subdivision during the Last Glacial Maximum about 110,000 to 12,000 years ago. The combination of large effective population sizes and occasional range shifts facilitated contact between the diverging goose species, resulting in high levels of interspecific gene flow. Introgressive hybridization might have enabled these goose populations to quickly adapt to changing environments by transferring of advantageous alleles across species boundaries, increasing standing genetic variation or expanding phenotypic variation of certain traits (e.g., beak morphology). Hybridization seems to be a common and integral component in the evolution and diversification of geese. The pervasiveness of rapid speciation and hybridization in geese complicates the attempt to capture their evolutionary history in a phylogenetic tree, advocating a phylogenetic network approach. Indeed, trying to ... Doctoral or Postdoctoral Thesis Tundra Wageningen UR (University & Research Centre): Digital Library |
institution |
Open Polar |
collection |
Wageningen UR (University & Research Centre): Digital Library |
op_collection_id |
ftunivwagenin |
language |
English |
topic |
anser crossing geese hybridization phylogenomics speciation species ganzen hybridisatie kruisen phylogenomica soorten soortvorming |
spellingShingle |
anser crossing geese hybridization phylogenomics speciation species ganzen hybridisatie kruisen phylogenomica soorten soortvorming Ottenburghs, Jente Crossing species boundaries : the hybrid histories of the true geese |
topic_facet |
anser crossing geese hybridization phylogenomics speciation species ganzen hybridisatie kruisen phylogenomica soorten soortvorming |
description |
Hybridization, the interbreeding of different species, is a common phenomenon in birds: about 16% of bird species is known to have hybridized with at least one other species. Numerous avian hybrid zones have been studied from a morphological or genetic perspective, often documenting the interspecific exchange of genetic material by hybridization and backcrossing (i.e. introgression). The incidence of hybridization varies among bird orders with the Anseriformes (waterfowl: ducks, geese and swans) showing the highest propensity to hybridize. In this thesis, I provide a genomic perspective on the role of hybridization in the evolutionary history of one particular anseriform tribe, the Anserini or “True Geese”, which comprises 17 species divided over two genera: Anser and Branta . The diversification of this bird group took place in the late Pliocene and the early Pleistocene (between four and two million years ago), conceivably driven by a global cooling trend that led to the establishment of a circumpolar tundra belt and the emergence of temperate grasslands. Most species show a steady population increase during this period, followed by population subdivision during the Last Glacial Maximum about 110,000 to 12,000 years ago. The combination of large effective population sizes and occasional range shifts facilitated contact between the diverging goose species, resulting in high levels of interspecific gene flow. Introgressive hybridization might have enabled these goose populations to quickly adapt to changing environments by transferring of advantageous alleles across species boundaries, increasing standing genetic variation or expanding phenotypic variation of certain traits (e.g., beak morphology). Hybridization seems to be a common and integral component in the evolution and diversification of geese. The pervasiveness of rapid speciation and hybridization in geese complicates the attempt to capture their evolutionary history in a phylogenetic tree, advocating a phylogenetic network approach. Indeed, trying to ... |
author2 |
Prins, Herbert Ydenburg, R.C. Megens, Hendrik-Jan |
format |
Doctoral or Postdoctoral Thesis |
author |
Ottenburghs, Jente |
author_facet |
Ottenburghs, Jente |
author_sort |
Ottenburghs, Jente |
title |
Crossing species boundaries : the hybrid histories of the true geese |
title_short |
Crossing species boundaries : the hybrid histories of the true geese |
title_full |
Crossing species boundaries : the hybrid histories of the true geese |
title_fullStr |
Crossing species boundaries : the hybrid histories of the true geese |
title_full_unstemmed |
Crossing species boundaries : the hybrid histories of the true geese |
title_sort |
crossing species boundaries : the hybrid histories of the true geese |
publisher |
Wageningen University |
publishDate |
2016 |
url |
https://research.wur.nl/en/publications/crossing-species-boundaries-the-hybrid-histories-of-the-true-gees https://doi.org/10.18174/393256 |
genre |
Tundra |
genre_facet |
Tundra |
op_relation |
https://edepot.wur.nl/393256 https://research.wur.nl/en/publications/crossing-species-boundaries-the-hybrid-histories-of-the-true-gees doi:10.18174/393256 |
op_rights |
Wageningen University & Research |
op_doi |
https://doi.org/10.18174/393256 |
_version_ |
1790609044824653824 |