Effects of inbreeding in three life stages of drosophila buzzatii after embryos were exposed to a high temperature stress

ABSTRACT The interaction between inbreeding and high-temperature stress was examined in the cactophilic fruit fly, _Drosophila buzzatii_. Embryos of four inbreeding levels (F = 0, F = 0.25,

F = 0.375, F = 0.5) were either maintained at 25°C throughout egg-to-adult development or were exposed to 41.5°C for 110 min at an age of 20 h. Hatching, larva-to-pupa survival,

pupa-to-adult survival, and egg-to-adult survival were estimated. Heat shock reduced hatching rates, but survival to adulthood for individuals that hatched was unaffected by the heat shock.

Inbreeding reduced the proportion of eggs hatching in the 25°C control group only. For larva-to-pupa and pupa-to-adult survival there was no interaction between inbreeding and stress. The

effect of inbreeding on egg-to-adult survival was stronger in the 25°C control group compared with the group exposed to heat shock. The results imply environmental dependency of inbreeding

depression and suggest that stress tolerance may not always be reduced by inbreeding. The thermal microenvironment of cactus rots in the field was assessed by measuring temperatures inside

17 rots. Internal rot temperatures varied with a maximum temperature of 48°C during the day. Selection for temperature tolerance in nature may have depleted genetic variation for this trait

limiting the effect of inbreeding on thermal resistance. SIMILAR CONTENT BEING VIEWED BY OTHERS INCREASED PUPAL TEMPERATURE HAS REVERSIBLE EFFECTS ON THERMAL PERFORMANCE AND IRREVERSIBLE

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Press, Chicago. Google Scholar  Download references AUTHOR INFORMATION AUTHORS AND AFFILIATIONS * Department of Ecology and Genetics, University of Aarhus, Ny Munkegade, Bldg. 540, Aarhus C,

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ABOUT THIS ARTICLE CITE THIS ARTICLE Dahlgaard, J., Loeschcke, V. Effects of inbreeding in three life stages of _Drosophila buzzatii_ after embryos were exposed to a high temperature stress.

_Heredity_ 78, 410–416 (1997). https://doi.org/10.1038/hdy.1997.64 Download citation * Received: 03 May 1996 * Issue Date: 01 April 1997 * DOI: https://doi.org/10.1038/hdy.1997.64 SHARE

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clipboard Provided by the Springer Nature SharedIt content-sharing initiative KEYWORDS * _Drosophila buzzatii_ * embryos * heat-shock tolerance * inbreeding * stress