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SUMMARY:The evolution of reproductive isolation: multiple hybrid zones in 
 Gorteria diffusa (Asteraceae) - Boris Delahaie\, Glover group
DTSTART:20190613T120000Z
DTEND:20190613T123000Z
UID:TALK123745@talks.cam.ac.uk
CONTACT:Ronelle Roth
DESCRIPTION:Speciation is considered as a continuous process where divergi
 ng populations go through different stages: from the initiation of reprodu
 ctive isolation to its completion. However\, observing the process of spec
 iation in its entirety is generally difficult and most studies are compell
 ed to look at a snapshot of divergence and reproductive isolation at one s
 pecific stage. Studying clades with multiple pairs of taxa varying in thei
 r extent of genetic\, phenotypic and ecological divergence will be necessa
 ry to shed light on how genetic differences and reproductive isolation acc
 umulate along the speciation continuum. Gorteria diffusa\, an endemic Aste
 raceae from Southern Africa\, represents a fascinating case of intraspecif
 ic diversification with 14 morphotypes varying mainly in floral morphology
  (colour\, positioning and complexity of petal spots). These morphotypes p
 resent various degree of genetic divergence\, are distributed in parapatry
  and meet at contact zones where they hybridize in various extent. In this
  study\, we combine field\, experimental and molecular approaches to study
  multiple hybrid zones in the species and investigate the evolution of rep
 roductive isolation.
LOCATION:Department of Plant Sciences\, Large Lecture Theatre
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