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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Autores principales: Goenaga, J., Fanara, J.J., Hasson, E.
Formato: JOUR
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Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00166723_v92_n4_p253_Goenaga
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spelling todo:paper_00166723_v92_n4_p253_Goenaga2023-10-03T14:14:31Z A quantitative genetic study of starvation resistance at different geographic scales in natural populations of Drosophila melanogaster Goenaga, J. Fanara, J.J. Hasson, E. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00166723_v92_n4_p253_Goenaga
institution Universidad de Buenos Aires
institution_str I-28
repository_str 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, J.
Fanara, J.J.
Hasson, E.
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.
format JOUR
author Goenaga, J.
Fanara, J.J.
Hasson, E.
author_facet Goenaga, J.
Fanara, J.J.
Hasson, E.
author_sort Goenaga, J.
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
url http://hdl.handle.net/20.500.12110/paper_00166723_v92_n4_p253_Goenaga
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