Thermal‐specific patterns of longevity and fecundity in a set of heat‐sensitive and heat‐resistant genotypes of Drosophila melanogaster

L. Stazione,F. M. Norry,P. Sambucetti

Published 2017 in Entomologia Experimentalis et Applicata

ABSTRACT

Fitness‐related traits are often affected by temperature. Heat‐resistant genotypes could influence the dependence of fitness traits on temperature, which should be important in adaptation to directional changes in temperature including global warming. Here, we tested temperature‐dependent variation in longevity and fecundity between Drosophila melanogaster Meigen (Diptera: Drosophilidae) genotypes that differ in heat‐resistance QTL. Longevity and fecundity were affected by heat‐resistance genotypes at constant moderate and high temperature. However, these differences between heat‐resistant and heat‐sensitive genotypes disappeared in a cyclic thermal regime. Analysis with the logistic mortality function indicated that mortality patterns are dependent on temperature and genotype. The results suggest that genotype*temperature interactions are substantial for senescence‐related traits. In particular, fluctuating temperatures can drastically reduce any differences in life‐history traits between heat‐resistance genotypes, even if such genotypes differentially affect the traits at constant temperatures.

PUBLICATION RECORD

  • Publication year

    2017

  • Venue

    Entomologia Experimentalis et Applicata

  • Publication date

    2017-12-01

  • Fields of study

    Biology, Environmental Science

  • Identifiers
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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REFERENCES

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