Open AccessDirect and correlated responses to selection for longevity in Drosophila buzzatii
Author(s) -
SCANNAPIECO ALEJANDRA C.,
SAMBUCETTI PABLO,
NORRY FABIAN M.
Publication year - 2009
Publication title -
biological journal of the linnean society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.906
H-Index - 112
eISSN - 1095-8312
pISSN - 0024-4066
DOI - 10.1111/j.1095-8312.2009.01223.x
Subject(s) - longevity , biology , fecundity , selection (genetic algorithm) , resistance (ecology) , population , genetics , ecology , demography , artificial intelligence , sociology , computer science
The possible associations between longevity, early fecundity, and stress‐resistance traits were explored using artificial selection on longevity in a laboratory population of Drosophila buzzatii . Three replicated lines were selected for increased lifespan (L lines) and compared with the respective unselected controls (C lines) after the 14th generation of selection. Mean longevity exhibited a significant response to selection. The baseline mortality tended to decrease in the L lines and a negative correlated response to longevity selection was found for early fecundity. Egg‐to‐adult developmental time increased in L lines. Longevity selection increased stress resistance for both high and low temperatures, as measured by heat knockdown resistance and chill‐coma recovery. Starvation resistance also tended to be higher in L than in C lines. The results obtained are consistent with the hypothesis of trade‐offs between longevity and early fecundity, and also suggest a trade‐off association between adult longevity and developmental time. Correlated selection responses were generally consistent with correlations among the traits previously inferred from altitudinal clines for longevity and stress‐resistance phenotypes. © 2009 The Linnean Society of London, Biological Journal of the Linnean Society , 2009, 97 , 738–748.