Please mark your calendar for the EEOB/EEB seminar.
Dr. Dan Sloan, Colorado State University
Genomic Coevolution Under Extreme Mitochondrial Mutation Rates
Refreshments served at 3:30pm in room 240 Bessey.
Abstract: One of the defining features of the eukaryotic cell is the presence of multiple genomes (nuclear, mitochondrial, and plastid), reflecting the endosymbiotic origins of eukaryotes. Key biological functions require that the gene products encoded by these genomes interact in an intimate and coordinated fashion. Therefore, nuclear and cytoplasmic genomes must coevolve in spite of fundamental differences in how they are replicated, inherited and expressed. I will discuss our recent research on how changes in mitochondrial genomes can select for coevolutionary responses in the nucleus. This work has involved broad comparative analyses across eukaryotic lineages and also taken advantage of a specific genus of flowering plants (Silene) with extreme variation in rates of mitochondrial genome evolution. I will relate findings from our research to ongoing debates about the role of cytonuclear coevolution in speciation and introgressive hybridization.