Longevity and resistance to cold stress in cold-stress selected lines and their controls in Drosophila melanogaster
Thermal environments can influence many fitness-related traits including life span. Here, we assess whether longevity in Drosophila melanogaster can experimentally evolve as a correlated response to cold-stress selection, and whether genotype-by-temperature and sex-by-temperature interactions are si...
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paper:paper_1010061X_v15_n5_p775_Norry2023-06-08T15:59:25Z Longevity and resistance to cold stress in cold-stress selected lines and their controls in Drosophila melanogaster Norry, Fabian Marcelo Cold-stress resistance Correlated responses Drosophila melanogaster Gene-by-temperature interaction Longevity Sex-specificity adaptation cold tolerance longevity selection Diptera Drosophila melanogaster Drosophilidae Melanogaster Thermal environments can influence many fitness-related traits including life span. Here, we assess whether longevity in Drosophila melanogaster can experimentally evolve as a correlated response to cold-stress selection, and whether genotype-by-temperature and sex-by-temperature interactions are significant components of variation in life span. Three replicated S lines were cold-stress selected and compared with their respective unselected controls (C lines) in the 16th generation of thermal selection. Cold-stress resistance exhibited a substantial direct response to selection, and also showed a significant interaction between sex and type of line. Mean longevity exhibited a significant interaction between adult test temperature (14 and 25°C) and line (with suggestive evidence for increased longevity of S lines when tested at 14°C), but there was no evidence for increased longevity in S lines at normal temperatures (i.e. 25°C). Another temperature-dependent effect was sex-specific, with males being the longer lived sex at 25°C but the less long-lived sex at 14°C. Additionally, we tested in an exploratory way the relationship between longevity and cold-stress resistance by also measuring resistance to a prefreezing temperature before and after one generation of longevity selection at 14°C (selection intensity, i = 1.47 for S lines, and 1.42 for C lines). In this longevity selection, we found that cold-stress resistance increased by about 6% in S lines and 18% in C lines. However, taken together, the results indicate no simple relationship between longevity and cold-stress resistance, with genotype-by-sex interactions in both traits. Temperature dependent interaction in longevity is apparent between S and C lines, and sex-specific variation in mean longevity also depends on temperature. 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_1010061X_v15_n5_p775_Norry http://hdl.handle.net/20.500.12110/paper_1010061X_v15_n5_p775_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 |
Cold-stress resistance Correlated responses Drosophila melanogaster Gene-by-temperature interaction Longevity Sex-specificity adaptation cold tolerance longevity selection Diptera Drosophila melanogaster Drosophilidae Melanogaster |
| spellingShingle |
Cold-stress resistance Correlated responses Drosophila melanogaster Gene-by-temperature interaction Longevity Sex-specificity adaptation cold tolerance longevity selection Diptera Drosophila melanogaster Drosophilidae Melanogaster Norry, Fabian Marcelo Longevity and resistance to cold stress in cold-stress selected lines and their controls in Drosophila melanogaster |
| topic_facet |
Cold-stress resistance Correlated responses Drosophila melanogaster Gene-by-temperature interaction Longevity Sex-specificity adaptation cold tolerance longevity selection Diptera Drosophila melanogaster Drosophilidae Melanogaster |
| description |
Thermal environments can influence many fitness-related traits including life span. Here, we assess whether longevity in Drosophila melanogaster can experimentally evolve as a correlated response to cold-stress selection, and whether genotype-by-temperature and sex-by-temperature interactions are significant components of variation in life span. Three replicated S lines were cold-stress selected and compared with their respective unselected controls (C lines) in the 16th generation of thermal selection. Cold-stress resistance exhibited a substantial direct response to selection, and also showed a significant interaction between sex and type of line. Mean longevity exhibited a significant interaction between adult test temperature (14 and 25°C) and line (with suggestive evidence for increased longevity of S lines when tested at 14°C), but there was no evidence for increased longevity in S lines at normal temperatures (i.e. 25°C). Another temperature-dependent effect was sex-specific, with males being the longer lived sex at 25°C but the less long-lived sex at 14°C. Additionally, we tested in an exploratory way the relationship between longevity and cold-stress resistance by also measuring resistance to a prefreezing temperature before and after one generation of longevity selection at 14°C (selection intensity, i = 1.47 for S lines, and 1.42 for C lines). In this longevity selection, we found that cold-stress resistance increased by about 6% in S lines and 18% in C lines. However, taken together, the results indicate no simple relationship between longevity and cold-stress resistance, with genotype-by-sex interactions in both traits. Temperature dependent interaction in longevity is apparent between S and C lines, and sex-specific variation in mean longevity also depends on temperature. |
| author |
Norry, Fabian Marcelo |
| author_facet |
Norry, Fabian Marcelo |
| author_sort |
Norry, Fabian Marcelo |
| title |
Longevity and resistance to cold stress in cold-stress selected lines and their controls in Drosophila melanogaster |
| title_short |
Longevity and resistance to cold stress in cold-stress selected lines and their controls in Drosophila melanogaster |
| title_full |
Longevity and resistance to cold stress in cold-stress selected lines and their controls in Drosophila melanogaster |
| title_fullStr |
Longevity and resistance to cold stress in cold-stress selected lines and their controls in Drosophila melanogaster |
| title_full_unstemmed |
Longevity and resistance to cold stress in cold-stress selected lines and their controls in Drosophila melanogaster |
| title_sort |
longevity and resistance to cold stress in cold-stress selected lines and their controls in drosophila melanogaster |
| publishDate |
2002 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1010061X_v15_n5_p775_Norry http://hdl.handle.net/20.500.12110/paper_1010061X_v15_n5_p775_Norry |
| work_keys_str_mv |
AT norryfabianmarcelo longevityandresistancetocoldstressincoldstressselectedlinesandtheircontrolsindrosophilamelanogaster |
| _version_ |
1768545841380851712 |