Variation in genetic architecture of olfactory behaviour among wild-derived populations of Drosophila melanogaster

• Autores: Lavagnino, N.J.; Anholt, R.R.H.; Fanara, J.J.
• Año de publicación: 2008
• Idioma: inglés
• Tipo de recurso: artículo
• Fuente: J. Evol. Biol. 2008;21(4):988-996
• Materia: Behaviour; Chemical ecology; Genetic variation; Phenotypic plasticity; Quantitative genetics; chemical ecology; fly; genetic variation; genotype-environment interaction; olfaction; olfactory cue; phenotypic plasticity; wild population; aging; animal; animal behavior; Argentina; article; Drosophila melanogaster; genetic variability; genetics; genotype; larva; metabolism; olfactory bulb; phenotype; physiology; population dynamics; sexual development; Aging; Animals; Argentina; Behavior, Animal; Drosophila melanogaster; Genotype; Larva; Olfactory Bulb; Phenotype; Population Dynamics; Sex Characteristics; Variation (Genetics); Drosophila melanogaster
• Institución: Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales

Odour-guided behaviour is a quantitative trait determined by many genes that are sensitive to gene-environment interactions. Different natural populations are likely to experience different selection pressures on the genetic underpinnings of chemosensory behaviour. However, few studies have reported comparisons of the quantitative genetic basis of olfactory behaviour in geographically distinct populations. We generated isofemale lines of Drosophila melanogaster from six populations in Argentina and measured larval and adult responses to benzaldehyde. There was significant variation within populations for both larval and adult olfactory behaviour and a significant genotype × sex interaction (GSI) for adult olfactory behaviour. However, there is substantial variation in the contribution of GSI to the total phenotypic variance among populations. Estimates of evolvability are orders of magnitude higher for larvae than for adults. Our results suggest that the potential for evolutionary adaptation to the chemosensory environment is greater at the larval feeding stage than at the adult reproductive stage. © 2008 The Authors.
Fil:Lavagnino, N.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.