A multivariate test of evolutionary constraints for thermal tolerance in Drosophila melanogaster
BR Williams, B van Heerwaarden, DK Dowling, CM Sgro
JOURNAL OF EVOLUTIONARY BIOLOGY | WILEY | Published : 2012
Exposure to extreme temperatures is increasingly likely to impose strong selection on many organisms in their natural environments. The ability of organisms to adapt to such selective pressures will be determined by patterns of genetic variation and covariation. Despite increasing interest in thermal adaptation, few studies have examined the extent to which the genetic covariance between traits might constrain thermal responses. Furthermore, it remains unknown whether sex-specific genetic architectures will constrain responses to climatic selection. We used a paternal half-sibling breeding design to examine whether sex-specific genetic architectures and genetic covariances between traits mig..View full abstract
Research was supported by Australian Research Council funding to CMS, and funds from Monash University to CMS and DKD. The authors thank Richard Lee, Fiona Cockerell and Winston Yee for their assistance with the heat tolerance assay, and Katrina McGuigan and Steve Chenoweth for discussions on analytical approaches.