Biological Sciences

2018 Strickland Entomology Seminar

At the University of Alberta, Edmonton, on Thursday, March 22, 2018. 
Refreshments at 3:30 pm, Strickland Lecture at 4:00-5:00 pm in Tory Breezeway 1 (TBW1)

The lecture will be given by: 
Dr. Chris Jiggins, Professor of Evolutionary Biology
Department of Zoology, Butterfly Genetics Group
University of Cambridge, U.K.
Butterfly Genetic Group

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Title: Understanding porous species boundaries by studying butterfly genomes.

Abstract: A major undertaking in evolutionary biology is to link genotype to phenotype and understand the evolutionary changes that lead to adaptation and speciation. Here I will give an overview of our work on the brightly coloured Heliconius butterflies, showing that hybridisation makes species boundaries remarkably porous across the genome. Patterns of species relationships are highly variable across the genome, and this can offer insight into the process of speciation. There is little evidence for changes in recombination rate or inversion differences between species during speciation. Despite these loci of large effect, across the genome there is evidence for pervasive polygenic selection maintaining species differences in the face of ongoing gene flow, indicated by a strong association of admixture with regions of high recombination.