A quantitative genetic study of starvation resistance at different geographic scales in natural populations of Drosophila melanogaster
Food shortage is a stress factor that commonly affects organisms in nature. Resistance to food shortage or starvation resistance (SR) is a complex quantitative trait with direct implications on fitness. However, surveys of natural genetic variation in SR at different geographic scales are scarce. He...
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2010
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166723_v92_n4_p253_Goenaga http://hdl.handle.net/20.500.12110/paper_00166723_v92_n4_p253_Goenaga |
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paper:paper_00166723_v92_n4_p253_Goenaga2023-06-08T14:38:40Z A quantitative genetic study of starvation resistance at different geographic scales in natural populations of Drosophila melanogaster Goenaga, Julieta Fanara, Juan Jose Hasson, Esteban Ruben Argentina article Drosophila melanogaster female genetic variability geography male natural population nonhuman phenotype phenotypic variation quantitative genetics sex difference starvation Adaptation, Physiological Analysis of Variance Animals Argentina Drosophila melanogaster Female Genetic Variation Male Quantitative Trait Loci Sex Factors Starvation Drosophila melanogaster Food shortage is a stress factor that commonly affects organisms in nature. Resistance to food shortage or starvation resistance (SR) is a complex quantitative trait with direct implications on fitness. However, surveys of natural genetic variation in SR at different geographic scales are scarce. Here, we have measured variation in SR in sets of lines derived from nine natural populations of Drosophila melanogaster collected in western Argentina. Our study shows that within population variation explained a larger proportion of overall phenotypic variance (80%) than among populations (72%). We also noticed that an important fraction of variation was sex-specific. Overall females were more resistant to starvation than males; however, the magnitude of the sexual dimorphism (SD) in SR varied among lines and explained a significant fraction of phenotypic variance in all populations. Estimates of cross-sex genetic correlations suggest that the genetic architecture of SR is only partially shared between sexes in the populations examined, thus, facilitating further evolution of the SD. Copyright © Cambridge University Press 2010. Fil:Goenaga, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Fanara, J.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Hasson, E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2010 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166723_v92_n4_p253_Goenaga http://hdl.handle.net/20.500.12110/paper_00166723_v92_n4_p253_Goenaga |
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Universidad de Buenos Aires |
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I-28 |
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R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Argentina article Drosophila melanogaster female genetic variability geography male natural population nonhuman phenotype phenotypic variation quantitative genetics sex difference starvation Adaptation, Physiological Analysis of Variance Animals Argentina Drosophila melanogaster Female Genetic Variation Male Quantitative Trait Loci Sex Factors Starvation Drosophila melanogaster |
| spellingShingle |
Argentina article Drosophila melanogaster female genetic variability geography male natural population nonhuman phenotype phenotypic variation quantitative genetics sex difference starvation Adaptation, Physiological Analysis of Variance Animals Argentina Drosophila melanogaster Female Genetic Variation Male Quantitative Trait Loci Sex Factors Starvation Drosophila melanogaster Goenaga, Julieta Fanara, Juan Jose Hasson, Esteban Ruben A quantitative genetic study of starvation resistance at different geographic scales in natural populations of Drosophila melanogaster |
| topic_facet |
Argentina article Drosophila melanogaster female genetic variability geography male natural population nonhuman phenotype phenotypic variation quantitative genetics sex difference starvation Adaptation, Physiological Analysis of Variance Animals Argentina Drosophila melanogaster Female Genetic Variation Male Quantitative Trait Loci Sex Factors Starvation Drosophila melanogaster |
| description |
Food shortage is a stress factor that commonly affects organisms in nature. Resistance to food shortage or starvation resistance (SR) is a complex quantitative trait with direct implications on fitness. However, surveys of natural genetic variation in SR at different geographic scales are scarce. Here, we have measured variation in SR in sets of lines derived from nine natural populations of Drosophila melanogaster collected in western Argentina. Our study shows that within population variation explained a larger proportion of overall phenotypic variance (80%) than among populations (72%). We also noticed that an important fraction of variation was sex-specific. Overall females were more resistant to starvation than males; however, the magnitude of the sexual dimorphism (SD) in SR varied among lines and explained a significant fraction of phenotypic variance in all populations. Estimates of cross-sex genetic correlations suggest that the genetic architecture of SR is only partially shared between sexes in the populations examined, thus, facilitating further evolution of the SD. Copyright © Cambridge University Press 2010. |
| author |
Goenaga, Julieta Fanara, Juan Jose Hasson, Esteban Ruben |
| author_facet |
Goenaga, Julieta Fanara, Juan Jose Hasson, Esteban Ruben |
| author_sort |
Goenaga, Julieta |
| title |
A quantitative genetic study of starvation resistance at different geographic scales in natural populations of Drosophila melanogaster |
| title_short |
A quantitative genetic study of starvation resistance at different geographic scales in natural populations of Drosophila melanogaster |
| title_full |
A quantitative genetic study of starvation resistance at different geographic scales in natural populations of Drosophila melanogaster |
| title_fullStr |
A quantitative genetic study of starvation resistance at different geographic scales in natural populations of Drosophila melanogaster |
| title_full_unstemmed |
A quantitative genetic study of starvation resistance at different geographic scales in natural populations of Drosophila melanogaster |
| title_sort |
quantitative genetic study of starvation resistance at different geographic scales in natural populations of drosophila melanogaster |
| publishDate |
2010 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166723_v92_n4_p253_Goenaga http://hdl.handle.net/20.500.12110/paper_00166723_v92_n4_p253_Goenaga |
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