January 14 2015

12:00 LSB 2320

Jeff Good
Division of Biological Sciences, University of Montana

Neo-sex Chromosome Evolution and Speciation in the Mountain Pine Beetle


Sex chromosomes play disproportionately large roles in adaptation and speciation but the links between these two processes remain unclear. The tempo of genome evolution is thought to be particularly rapid during transitions to new (neo) sex determining chromosomes, yet the impact of neo-sex chromosome evolution on incipient speciation has received little attention. I will discuss our research combining extensive crossing experiments with population and comparative genomic data in the neo-XY mountain pine beetle system. With these data we show a rapid progression of intrinsic reproductive isolation between closely related populations that is geographically coupled with extensive genetic and functional differentiation of the neo sex chromosomes. Our results provide insights into the early stages of sex chromosome evolution and its potential to drive incipient speciation.











































































































































































































































































































































































































































































































































































































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