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Abstract Detail


Advances in Plant Systematics and Population Genomics: Applications of Next Generation Techniques

Kane , Nolan C [1], Grassa, Chris [1], Andrew, Rose [1], Renaut, Sebastien [1], Rieseberg, Loren [1].

Genetic underpinnings of divergence and adaptation in Helianthus.

Numerous taxa remain morphologically distinct in the face of hybridization with other species. It is often assumed that gene flow from other species only affects a small proportion of the genome, but recent work suggests that reproductive barriers may be quite porous, allowing some gene flow over much of the genome. We have used high resolution genomic scans to estimate locus-specific and genome-wide effective migration rates and levels of differentiation for multiple pairs of sunflower taxa that vary in divergence time, strength of reproductive isolation and degree of genographic separation. We show that genomic regions of differentation are small, only exceeding a handful of genes in a few areas of low recombination. While these scans can identify possible "speciation genes" under strong divergent selection, these loci appear to affect gene flow at only very localized regions of the genome.

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1 - University Of British Columbia, Department Of Botany, 6270 University Blvd, Vancouver, BC, V6T 1Z4, Canada

Keywords:
population genetics
genomics
speciation
domestication
adaptation.

Presentation Type: Symposium or Colloquium Presentation
Session: SY03
Location: Lenox Room/Chase Park Plaza
Date: Monday, July 11th, 2011
Time: 3:45 PM
Number: SY03006
Abstract ID:365


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