Reference : High gene flow between alternative morphs and the evolutionary persistence of faculta...
Scientific journals : Article
Life sciences : Genetics & genetic processes
Life sciences : Environmental sciences & ecology
Life sciences : Aquatic sciences & oceanology
Life sciences : Zoology
Life sciences : Multidisciplinary, general & others
http://hdl.handle.net/2268/201318
High gene flow between alternative morphs and the evolutionary persistence of facultative paedomorphosis
English
Oromi Farrús, Neus mailto [Université de Liège > Département de Biologie, Ecologie et Evolution > Biologie du comportement - Ethologie et psychologie animale >]
Michaux, Johan mailto [Université de Liège > Département des sciences de la vie > Génétique et physiologie des microalgues >]
Denoël, Mathieu mailto [Université de Liège > Département de Biologie, Ecologie et Evolution > Biologie du comportement - Ethologie et psychologie animale >]
Aug-2016
Scientific Reports
Nature Publishing Group
6
32046
Yes (verified by ORBi)
International
2045-2322
London
United Kingdom
[en] Evolution ; Facultative paedomorphosis ; Metamorphosis ; Population genetics ; Microsatellites ; Gene flow ; Population structure ; Alternative morphs ; Heterochrony ; Polymorphism ; Polyphenism ; Lissotriton helveticus ; Palmate newt ; Amphibian ; Larzac
[en] Paedomorphosis and metamorphosis are two major developmental processes that characterize the evolution of complex life cycles in many lineages. Whereas these processes were fixed in some taxa, they remained facultative in others, with alternative phenotypes expressed in the same populations. From a genetic perspective, it is still unknown whether such phenotypes form a single population or whether they show some patterns of isolation in syntopy. This has deep implications for understanding the evolution of the phenotypes, i.e. towards their persistence or their fixation and speciation. Newts and salamanders are excellent models to test this hypothesis because they exhibit both developmental processes in their populations: the aquatic paedomorphs retain gills, whereas the metamorphs are able to colonize land. Using microsatellite data of coexisting paedomorphic and metamorphic palmate newts (Lissotriton helveticus), we found that they formed a panmictic population, which evidences sexual compatibility between the two phenotypes. The high gene flow could be understood as an adaptation to unstable habitats in which phenotypic plasticity is favored over the fixation of developmental alternatives. This makes then possible the persistence of a polyphenism: only metamorphosis could be maintained in case of occasional drying whereas paedomorphosis could offer specific advantages in organisms remaining in water.
Applied and Fundamental FISH Research Center - AFFISH-RC
F.R.S.-FNRS - Fonds de la Recherche Scientifique ; Marie-Curie BeIPD COFUND
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/201318
10.1038/srep32046
This paper is published by Nature Publishing Group
FP7 ; 600405 - BEIPD - Be International Post-Doc - Euregio and Greater Region

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