10.5061/DRYAD.MKKWH7122
Stöck, Matthias
0000-0003-4888-8371
Leibniz Institute of Freshwater Ecology and Inland Fisheries
Majtyka, Tomasz
University of Wrocław
Borczyk, Bartosz
University of Wrocław
Ogielska, Maria
0000-0002-4485-4441
University of Wrocław
Morphometric data of two tree frog species and their hybrids from a hybrid
zone in Poland
Dryad
dataset
2021
Amphibians
Hybridization
hybrid zones
Hyla arborea group
Hylidae
morphometics
transgressive phenotypes
transgressive segregation
Evolutionary biology
University of Wrocław
https://ror.org/00yae6e25
DS/1018/S/IZ/2011
2022-06-10T00:00:00Z
2022-06-10T00:00:00Z
en
https://doi.org/10.1002/ece3.8527
187365 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Under incomplete reproductive isolation, secondary contact of diverged
allopatric lineages may form hybrid zones that allow to study recombinants
over several generations as excellent systems of genomic interactions,
resulting from the evolutionary forces, acting on certain genes and
phenotypes. Hybrid phenotypes are expected to either exhibit intermediacy
or, alternatively, transgressive traits, which exceed the extremes of
their parents due to epistasis and segregation of complementary alleles.
While transgressive morphotypes have been examined in fish, reptiles,
birds, and mammals, studies in amphibians are rare. Here, we associate
microsatellite-based genotypes and morphometrics-based morphotypes of two
European tree frog species of the Hyla arborea group, sampled across a
hybrid zone in Poland, to understand whether the genetically
differentiated parental species also differ in morphology between each
other and their hybrids, and whether secondary contact leads to the
evolution of intermediate or transgressive morphotypes. Using univariate
approaches, explorative multivariate methods (Principal Component
Analyses) as well as techniques with prior grouping (Discriminant Function
Analyses), we find that morphotypes of both parental species and hybrids
differ from each other. Importantly, hybrid morphotypes are neither
intermediate nor transgressive but found to be more similar to H.
orientalis than to H. arborea. Our study presents one of the rare
datasets, in which genotypes along with morphotypes examined the
occurrence or absence of transgressive morphologies in wild amphibians.