Temperature-induced shifts in associations of longevity with body size in Drosophila melanogaster
One of the hypotheses of growing interest in studies of responses to thermal environments suggests that trade-offs and other trait associations may be altered by temperature. Here, the commonly observed positive association between body size and longevity was examined at two adult test temperatures,...
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2002
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00143820_v56_n2_p299_Norry http://hdl.handle.net/20.500.12110/paper_00143820_v56_n2_p299_Norry |
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paper:paper_00143820_v56_n2_p299_Norry2023-06-08T14:37:01Z Temperature-induced shifts in associations of longevity with body size in Drosophila melanogaster Norry, Fabian Marcelo Body size Cold-stress tolerance Developmental time Drosophila melanogaster Longevity Trade-offs Trait associations body size longevity temperature effect trade-off Animalia Diptera Diptera Drosophila melanogaster Drosophila melanogaster Drosophilidae Drosophilidae Melanogaster One of the hypotheses of growing interest in studies of responses to thermal environments suggests that trade-offs and other trait associations may be altered by temperature. Here, the commonly observed positive association between body size and longevity was examined at two adult test temperatures, 14°C and 25°C, in cold-stress-selected lines (S) and their controls (C) in 25°C-reared Drosophila melanogaster. Thorax length (TL) and developmental time (DT) were also scored in 25°C-reared individuals before and after one generation of truncation selection on longevity. The topography of the selection surface that relates longevity to thorax and wing size was temperature dependent and differed both between lines and between sexes. Longevity increased monotonically with body size (TL) in C and S females at 25°C but, surprisingly, longevity decreased with body size in S individuals at 14°C. Body size did not diverge between S and C lines and showed no response to longevity selection. However, DT increased by 25°C-longevity selection in C individuals and decreased by 14°C-longevity selection in S individuals. These results suggest that trait associations (including the commonly observed trade-off between body size and DT) can greatly depend on temperature, as a shift in the sign of the correlation is possible at low temperature. Genotype X temperature interaction is an important source of variation in the relationship between soma size and longevity. Fil:Norry, F.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2002 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00143820_v56_n2_p299_Norry http://hdl.handle.net/20.500.12110/paper_00143820_v56_n2_p299_Norry |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Body size Cold-stress tolerance Developmental time Drosophila melanogaster Longevity Trade-offs Trait associations body size longevity temperature effect trade-off Animalia Diptera Diptera Drosophila melanogaster Drosophila melanogaster Drosophilidae Drosophilidae Melanogaster |
| spellingShingle |
Body size Cold-stress tolerance Developmental time Drosophila melanogaster Longevity Trade-offs Trait associations body size longevity temperature effect trade-off Animalia Diptera Diptera Drosophila melanogaster Drosophila melanogaster Drosophilidae Drosophilidae Melanogaster Norry, Fabian Marcelo Temperature-induced shifts in associations of longevity with body size in Drosophila melanogaster |
| topic_facet |
Body size Cold-stress tolerance Developmental time Drosophila melanogaster Longevity Trade-offs Trait associations body size longevity temperature effect trade-off Animalia Diptera Diptera Drosophila melanogaster Drosophila melanogaster Drosophilidae Drosophilidae Melanogaster |
| description |
One of the hypotheses of growing interest in studies of responses to thermal environments suggests that trade-offs and other trait associations may be altered by temperature. Here, the commonly observed positive association between body size and longevity was examined at two adult test temperatures, 14°C and 25°C, in cold-stress-selected lines (S) and their controls (C) in 25°C-reared Drosophila melanogaster. Thorax length (TL) and developmental time (DT) were also scored in 25°C-reared individuals before and after one generation of truncation selection on longevity. The topography of the selection surface that relates longevity to thorax and wing size was temperature dependent and differed both between lines and between sexes. Longevity increased monotonically with body size (TL) in C and S females at 25°C but, surprisingly, longevity decreased with body size in S individuals at 14°C. Body size did not diverge between S and C lines and showed no response to longevity selection. However, DT increased by 25°C-longevity selection in C individuals and decreased by 14°C-longevity selection in S individuals. These results suggest that trait associations (including the commonly observed trade-off between body size and DT) can greatly depend on temperature, as a shift in the sign of the correlation is possible at low temperature. Genotype X temperature interaction is an important source of variation in the relationship between soma size and longevity. |
| author |
Norry, Fabian Marcelo |
| author_facet |
Norry, Fabian Marcelo |
| author_sort |
Norry, Fabian Marcelo |
| title |
Temperature-induced shifts in associations of longevity with body size in Drosophila melanogaster |
| title_short |
Temperature-induced shifts in associations of longevity with body size in Drosophila melanogaster |
| title_full |
Temperature-induced shifts in associations of longevity with body size in Drosophila melanogaster |
| title_fullStr |
Temperature-induced shifts in associations of longevity with body size in Drosophila melanogaster |
| title_full_unstemmed |
Temperature-induced shifts in associations of longevity with body size in Drosophila melanogaster |
| title_sort |
temperature-induced shifts in associations of longevity with body size in drosophila melanogaster |
| publishDate |
2002 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00143820_v56_n2_p299_Norry http://hdl.handle.net/20.500.12110/paper_00143820_v56_n2_p299_Norry |
| work_keys_str_mv |
AT norryfabianmarcelo temperatureinducedshiftsinassociationsoflongevitywithbodysizeindrosophilamelanogaster |
| _version_ |
1768542969350062080 |