Heat knockdown resistance and chill-coma recovery as correlated responses to selection on mating success at high temperature in Drosophila buzzatii

Ecology and Evolution
L StazioneP Sambucetti

Abstract

Reproduction and related traits such as mating success are strongly affected by thermal stress. We tested direct and correlated responses to artificial selection in replicated lines of Drosophila buzzatii that were selected for mating success at high temperature. Knockdown resistance at high temperature (KRHT) and chill-coma recovery (CCR) were tested as correlated selection responses. Virgin flies were allowed to mate for four hours at 33°C in three replicated lines (S lines) to obtain the selected flies and then returned at 25°C to lay eggs. Other three replicated lines were maintained at 25°C without any selection as control (C lines). After 15 selection generations, KRHT and CCR were measured. Both traits were assessed in flies that did not receive any hardening pretreatments as well as in flies that were either heat or cold hardened. Thermotolerance traits showed significant correlated responses with higher KRHT in S than in C lines, both with a heat-hardening pretreatment and without a heat-hardening pretreatment. CCR time was longer in S than in C lines both with a cold-hardening pretreatment and without a cold-hardening pretreatment. Hardening treatments improved both KRHT and CCR in all cases excepting KRHT in C lines....Continue Reading

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Feb 21, 2019·Journal of Thermal Biology·L StazioneP Sambucetti

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Citations

Sep 27, 2020·Molecular Ecology·Sheng-Kai HsuChristian Schlötterer
Apr 6, 2021·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Aerianna S LittlerNicholas M Teets
Jun 26, 2021·Journal of Insect Physiology·Maia RodríguezPaola Ferrero

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Methods Mentioned

BETA
thermal treatment

Software Mentioned

InfoStat
R
stats
lme4

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