Constraints on the evolution of thermal sensitivity of foraging in Trichogramma: genetic trade-offs and plasticity in maternal selection

The American Naturalist
Y Carrière, G Boivin

Abstract

Negative genetic correlation between performance at different temperatures or temperature-dependent mutations may promote evolution of thermal specialization in ectotherms. The first hypothesis implies that a selective change in performance at one temperature simultaneously results in change in performance at others, while the second implies a delay before observing such indirect responses. Comparison of the direction of evolution among Trichogramma lines selected for improvement of parasitization capacity at low, medium, or high temperatures indicated that a change in performance at one temperature concurrently resulted in opposite changes at distant temperatures. Unexpectedly, selection at high temperatures resulted in a decrease in adult fitness components, while adult performance expressed at cold temperatures simultaneously increased. The relationship between maternal fecundity and offspring fitness components varied across the thermal range. No correlation between these traits was present at cold or medium temperatures, but negative relationships appeared at high temperatures. We show that maternal selection resulting from a conflict between adult and offspring fitness components may have resulted in reversed evolution of...Continue Reading

References

Jul 1, 1997·The American Naturalist·M Kirkpatrick, N H Barton
May 1, 1989·Trends in Ecology & Evolution·R B Huey, J G Kingsolver
May 1, 1991·Trends in Ecology & Evolution·J Antonovics, P H van Tienderen
Jun 1, 1994·Trends in Ecology & Evolution·A A Hoffmann, M W Blows

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Citations

Jan 1, 2006·Journal of Insect Science·S Ya Reznik, N Z Klyueva
Aug 19, 2008·The American Naturalist·R Craig MacLean, Graham Bell
Dec 17, 2015·Annual Review of Entomology·Carla M SgròAry A Hoffmann
Sep 3, 2011·PloS One·Vendula KurdíkováLumír Gvoždík

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