naa a22 4500 510780504 CHVBK 20180411083245.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1007/s11692-013-9235-6 doi (NATIONALLICENCE)springer-10.1007/s11692-013-9235-6 Latitudinal Variation in Starvation Resistance is Explained by Lipid Content in Natural Populations of Drosophila melanogaster [Elektronische Daten] [Julieta Goenaga, Juan Fanara, Esteban Hasson] One of the most common environmental stressors is a shortage or suboptimal quality of food, thus all animals deal with periods of starvation. In the present study we examine variation in starvation resistance, longevity and body lipid content and the correlations between traits along an environmental gradient using isofemale lines recently derived from natural populations of Drosophila melanogaster from South America. The use of isofemale lines and controlled rearing laboratory conditions allows us to investigate within and among population components of genetic variation and the potential associations among starvation resistance, longevity and body lipid content. All these traits were analyzed separately in females and males, improving our understanding of sexual dimorphism. Our results revealed significant differences among populations in starvation resistance and longevity. Actually, the opposing latitudinal cline detected for starvation resistance suggests that natural selection played an essential role in shaping the pattern of geographic variation in this trait. Moreover, we also detected a positive relationship between starvation resistance and body lipid content in both sexes, providing evidence for a physiological and/or evolutionary association between these traits. Conversely, starvation resistance was not correlated with longevity indicating that these traits might be enabled to evolve independently. Finally, our study reveals that there is abundant within population genetic variation for all traits that may be maintained by sex-specific effects. Springer Science+Business Media New York, 2013 Genetic correlation nationallicence Latitudinal cline nationallicence Genetic variation nationallicence Genotype×sex interaction nationallicence Starvation resistance nationallicence Drosophila melanogaster nationallicence Goenaga Julieta Instituto de Ecología Genética y Evolución de Buenos Aires, Departamento de Ecología Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellón II, C1428 EHA, Buenos Aires, Argentina aut Fanara Juan Instituto de Ecología Genética y Evolución de Buenos Aires, Departamento de Ecología Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellón II, C1428 EHA, Buenos Aires, Argentina aut Hasson Esteban Instituto de Ecología Genética y Evolución de Buenos Aires, Departamento de Ecología Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellón II, C1428 EHA, Buenos Aires, Argentina aut Evolutionary Biology Springer US; http://www.springer-ny.com 40/4(2013-12-01), 601-612 0071-3260 40:4<601 2013 40 11692 https://doi.org/10.1007/s11692-013-9235-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11692-013-9235-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Goenaga Julieta Instituto de Ecología Genética y Evolución de Buenos Aires, Departamento de Ecología Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellón II, C1428 EHA, Buenos Aires, Argentina aut NATIONALLICENCE 700 1- Fanara Juan Instituto de Ecología Genética y Evolución de Buenos Aires, Departamento de Ecología Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellón II, C1428 EHA, Buenos Aires, Argentina aut NATIONALLICENCE 700 1- Hasson Esteban Instituto de Ecología Genética y Evolución de Buenos Aires, Departamento de Ecología Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellón II, C1428 EHA, Buenos Aires, Argentina aut NATIONALLICENCE 773 0- Evolutionary Biology Springer US; http://www.springer-ny.com 40/4(2013-12-01), 601-612 0071-3260 40:4<601 2013 40 11692 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer