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A phylogenomic approach rebuild the evolUne approche phylogénomique permet de reconstruire l’histoire évolutive du genre Gallus (et d’identifier des hybrides)

The evolutive history of the Gallus genus, including the chicken, has been explored in many studies that have led to incompatible phylogenetic trees. The genus is made up of 4 wild fowl species: the red junglefowl (Gallus gallus, southeast Asia), the grey junglfowl (Gallus sonneratti, India), the Lafayette's junglefowl (Gallus lafayetti, Sri Lanka) and the green junglfowl (Gallus varius, Indonesia). Previous studies suggest that the ancestral branch concerns either the red junglfowl (A scenario) or the green junglfowl (B scenario). They have limits however: often only one bird per species, few genes, etc.

In this article published in Molecular Phylogenetics and Evolution, scientists from INRAE Jouy-en-Josas (INRAE MaIAGE Unit and INRAE/AgroParisTech/UPSaclay GABI Unit) sequenced the complete genome of several birds from each species. These birds lived in either their natural environment or in zoological parks. The phylogeny was inferred using a library of thirty-three million markers. It turns out that the grey junglfowl from parks are really grey junglefowl (~90%) / red junglefowl (~10%) hybrids with a hybridation that dates back 200-years, which disturbs phylogenetic analyses. We find either scenario A or B with absolute certainty, depending on the inference method used. Quantification of gene flow between species produces aberrant results with the B scenario which in fine allows us to choose the A scenario.

Contact : michele.tixier-boichard@inrae.fr

Mahendra Mariadassou, Marie Suez, Sathya Sathyakumar, Alain Vignal, Mariangela Arca, Pierre Nicolas, Thomas Faraut, Diane Esquerré, Masahide Nishibori, Agathe Vieaud, Chih-Feng Chen, Hung Manh Pham, Yannick Roman, Frédéric Hospital, Tatiana Zerjal, Xavier Rognon, Michèle Tixier-Boichard,
Unraveling the history of the genus Gallus through whole genome sequencing. Molecular Phylogenetics and Evolution. 2020, 107044,
ISSN 1055-7903, https://doi.org/10.1016/j.ympev.2020.107044. (http://www.sciencedirect.com/science/article/pii/S105579032030316X)

Modification date : 14 September 2023 | Publication date : 11 January 2021 | Redactor : GABI - Translation W. Brand-Williams

Publication Molecular Phylogenetics and Evolution

A phylogenomic approach rebuild the evolUne approche phylogénomique permet de reconstruire l’histoire évolutive du genre Gallus (et d’identifier des hybrides)

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