News

Encontro Scientia Inês Fragata 10 Dezembro 2015

Download:

How much difference makes a difference during adaptation? A real-time evolution study in Drosophila subobscura

Inês Fragata
PhD, Evolutionary Ecology Group


Understanding the mechanisms and processes that underlie adaptation and which factors affect the evolutionary potential of populations are central themes in Evolutionary Biology. Here we address the issue of how history, chance and selection can affect the adaptation to new environments, integrating several biological levels. For that we characterized the initial differentiation and subsequent evolutionary dynamics in a new common environment of three Drosophila subobscura populations, derived from different locations along the European cline for several phenotypic traits, thermal plasticity and chromosomal inversion frequencies. We found that quick convergence occurred at the phenotypic level, but populations remained differentiated for chromosomal polymorphism even after forty generations of evolution in the common environment. Nevertheless, some inversions presented similar selective patterns between foundations indicating that selection acted within the boundaries created by history. Summing up, we found that history does not constrain phenotypic adaptive evolution, nor plastic thermal response. We show that adaptation to a new environment can be attained through different genetic mechanisms. Finally, adaptation to a stable environment does not hamper later response to novel environmental challenges.

5ª feira, 10 de Dezembro de 2015
FCUL (Edif. C6) – 12.00h-13.00h – Sala 6.2.51

Other Articles

  • Genotype to Phenotype  of the Immune Response

    Conference Genotype to Phenotype of the Immune Response

  • Assessing the wider implications of species extinctions: island birds and beyond

    Conference Assessing the wider implications of species extinctions: island birds and beyond

  • Citizen science “biodiversity apps” and connection to nature

    Conference Citizen science “biodiversity apps” and connection to nature

  • Monitoring for Resilient Forests - Needs, Gaps, and Way Ahead

    Conference Monitoring for Resilient Forests - Needs, Gaps, and Way Ahead

  • Sexual selection in plants: what happens after pollen land on the pistil?

    Conference Sexual selection in plants: what happens after pollen land on the pistil?