Evolutionary genomics of plant adaptation and speciation

Plant Evolutionary Genomics

Understanding the genetics of adaptation, reproductive isolation and speciation has always been of great interest to biology, but the molecular and computational tools required to address these long-standing questions have become available only recently. The advent of genomic and post-genomic science holds great promise for students of organismal evolution in both animals and plants. We use plants as preferred organisms for our research, because plants are more amenable to evolutionary genetics studies, e.g. plants can often be crossed rather easily and their sessile nature facilitates the estimation of fitness effects (the ‘adaptive value’) of individual traits, chromosomal segments, or even individual genes in the wild. An important motivation for our work also lies in the immense potential conservation value of phenotypes and genotypes we study, especially in wild relatives of domesticated species. Our current flagship project (funded by the British NERC and the Swiss SNF) addresses the evolutionary genomics of adaptation and speciation in European Populus (poplars and aspens), please find out more about our interests at: http://www.unifr.ch/biol/ecology/lexer/research.html

Research topics

  • Genetics of plant speciation

  • Genetics of local adaptation

  • Plant species evolution in neotropical mountains

Interdisciplinary

  • Ecological & evolutionary functional genomics

  • Genetics of plant chemical traits (e.g. secondary compounds)

  • Genetics of traits involved in range shifts

  • Ecological impact and evolutionary outcomes of hybridization

  • Integrating molecular population genetics and biogeography

Contact Person

Prof. Dr. Christian Lexer

University of Fribourg
Department of Biology
Website
christian.lexer-at-unifr.ch
+41 (0)26 300 88 68


Recent publications

  • Title: Genetic analysis of post-mating reproductive barriers in hybridizing European Populus species
    Author(s): Macaya-Sanz, D.; Suter, L.; Joseph, J.; et al.
    Source: HEREDITY, 107 (5): 478-486 OCT 2011
    Document type: Article (Details)
  • Tracing the recombination and colonization history of hybrid species in space and time
    Lexer, C.; Stoelting, K. N.
    MOLECULAR ECOLOGY, 20 (18): 3701-3704 SEP 2011 (Details)
  • Phylogeography and genetic differentiation along the distributional range of the orchid Epidendrum fulgens: a Neotropical coastal species not restricted to glacial refugia
    Pinheiro, Fabio; de Barros, Fabio; Palma-Silva, Clarisse; et al.
    JOURNAL OF BIOGEOGRAPHY, 38 (10): 1923-1935 OCT 2011 (Details)
  • Pollen-pistil interactions and self-incompatibility in the Asteraceae: new insights from studies of Senecio squalidus (Oxford ragwort)
    Allen, Alexandra M.; Thorogood, Christopher J.; Hegarty, Matthew J.; et al.
    ANNALS OF BOTANY, 108 (4): 687-698 SEP 2011 (Details)
  • Sympatric bromeliad species (Pitcairnia spp.) facilitate tests of mechanisms involved in species cohesion and reproductive isolation in Neotropical inselbergs
    Palma-Silva, C; Wendt, T; Pinheiro, F; et al.
    MOLECULAR ECOLOGY 20 (15): 3185-3201 AUG 2011 (Details)

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