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SUMMARY:What can plants tell us about the evolution of sex chromosomes? - 
 Deborah Charlesworth\, Edinburgh University
DTSTART:20130228T130000Z
DTEND:20130228T140000Z
UID:TALK39044@talks.cam.ac.uk
CONTACT:Jill Harrison
DESCRIPTION:The advantages of genetic recombination are well known\, but s
 ome situations have led to its suppression. I will show how ideas about th
 e evolution of mimicry in butterflies led to an understanding of how the e
 volution of complex adaptations\, that are built up in several evolutionar
 y steps\, may select for suppressed recombination\, and how this understan
 ding illuminates the evolution of sex chromosomes. Although the theoretica
 l work involved in understanding these situations was done many years ago\
 , recent developments in molecular methods are allowing empirical studies 
 to test the hypotheses involved\, even though the best species for these t
 ests are non-model animal and plant species. I will particularly focus on 
 the value of plants for studying the evolution of non-recombining Y chromo
 somes\, including estimating the age when different systems evolved\, and 
 the time-course of recombination suppression across the sex chromosome pai
 r. I will discuss the sexual antagonism hypothesis for recombination suppr
 ession\, and how it may be tested in evolving sex chromosome systems.
LOCATION:Sainsbury Laboratory
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