Time: 10:40 AM
We first evaluate the evolutionary success of hybrid plant species, by adressing speciation versus extinction rates of a collection of homoploid and allopolyploid species, using a phylogenetic framework. We then focus on a hybrid zone in Arizona, between two North American Selaginella species (Lycophyte), where successful hybrid populations occur. The hybrids grow independently from their parental species and are fully fertile. We investigate what ecological and genetic features differentiate these successful hybrids from their parental species, using ecological niche modelling and next generation sequencing. Due to their small genome sizes (50 and 70Mb for the parental species, S. eremophila and S. arizonica), we expect to produce high quality assemblies and assess whether significant genome rearrangements have occurred in the hybrid lineage, a feature that is highly indicative of genetic isolation between hybrids and parent species.