RT Journal Article
SR Electronic
T1 No evidence for the radiation time lag model after whole genome duplications in Teleostei
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 099663
DO 10.1101/099663
A1 Sacha Laurent
A1 Nicolas Salamin
A1 Marc Robinson-Rechavi
YR 2017
UL http://biorxiv.org/content/early/2017/01/11/099663.abstract
AB The short and long term effects of polyploidization on the evolutionary fate of lineages is still unclear despite much interest. First recognized in land plants, it has become clear that polyploidization is widespread in eukaryotes, notably at the origin of vertebrates and teleost fishes. Many hypotheses have been proposed to link the evolutionary success of lineages and whole genome duplications. For instance, the radiation time lag model suggests that paleopolyploidy would favour the apparition of key innovations, although the evolutionary success would not become apparent until a later dispersion event. Some results indicate that this model may be observed during land plant evolution. In this work, we test predictions of the radiation time lag model using both fossil data and molecular phylogenies in ancient and more recent teleost whole genome duplications. We fail to find any evidence of delayed evolutionary success after any of these events and conclude that paleopolyploidization still remains to be unambiguously linked to evolutionary success in fishes.