CPB Tuesday Seminar: James Mallet – November 27, 2012 – 1022 Life Science

CPB Seminar Series: Fall 2012

When: Tuesdays, 4:10 – 5:30PM

Where: 1022 Life Sciences Building

November 27: James Mallet, Distinguished Lecturer

Department of Organismic and Evolutionary Biology, Harvard University

Title: “
Hybridization and speciation in Amazonian butterflies: rainforest genomics”

Rick Grosberg

It is a seductive idea that species are independent evolutionary units. Natural hybridization is rare in nature on a per-individual basis, but it may affect many species. Brightly-coloured Heliconius butterflies engage in Müllerian mimicry of other species. Although most of this mimicry is due to adaptive reconstruction of similar patterns, we’ve long suspected that colour patterns are exchanged among some closely related species that hybridize occasionally in nature. We have recently shown that genomic regions that determine mimicry have been exchanged repeatedly among species to form new, adaptive combinations. Through their joint effects on mating behaviour and signalling to predators, these novel colour patterns are also involved in triggering evolution of new species.

Author: Jonathan Eisen

I am an evolutionary biologist and a Professor at U. C. Davis. (see my lab site here). My research focuses on the origin of novelty (how new processes and functions originate). To study this I focus on sequencing and analyzing genomes of organisms, especially microbes and using phylogenomic analysis

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