We are seeking for a PhD student interested in exploring how plant clonality influences the pace of macroevolution. The PhD project will examine the links between plant clonality and rates of diversification (i.e. speciation and extinction) and molecular evolution across the angiosperms. Clonal reproduction leads to longer time between sexual reproduction events and at the same time it decreases effective population sizes. The interplay of these processes is thus likely to affect both diversification rates and rates of molecular evolution.

The main task of the PhD. student will be to test the following two hypotheses:

Diversification rates in predominantly clonal plant lineages differ from the rates in predominantly non-clonal lineages. To test this, they will assemble and analyze data on evolutionary dynamics of clonality on large phylogenetic scales from existing databases and link them with phylogenetic data using likelihood-based State-dependent Speciation Extinction (SSE) models.

Rates of molecular evolution are slower in lineages with prevailing share of clonal species. This will be tested with pairs of higher taxa covering the whole variability in clonality trait difference identified using the ancestral state estimations from the SSE models. These pairs will be used to infer the relationship between clonality status and the rate of molecular evolution in different types of regions (nuclear and chloroplast, coding vs non-coding, and synonymous vs non-synonymous).

The position is funded by the Charles University in Prague (Czechia) for 4 years and will be supervised by Tomáš Herben (PI) and Jan Smyčka. More information about the project and the application procedure can be found here: https://stars-natur.cz/phd-positions/biology/diversification-rates-and-molecular-evolution-in-clonal-and-non-clonal-plants?back=h3z8v

Le contenu de cette offre est la responsabilité de ses auteurs. Pour toute question relative à cette offre en particulier (date, lieu, mode de candidature, etc.), merci de les contacter directement. Un email de contact est disponible: smyckaj@gmail.com

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