PT  - JOURNAL ARTICLE
AU  - Sacha Laurent
AU  - Nicolas Salamin
AU  - Marc Robinson-Rechavi
TI  - No evidence for the radiation time lag model after whole genome duplications in Teleostei
AID  - 10.1101/099663
DP  - 2017 Jan 01
TA  - bioRxiv
PG  - 099663
4099  - http://biorxiv.org/content/early/2017/01/11/099663.short
4100  - http://biorxiv.org/content/early/2017/01/11/099663.full
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.