Artículos de revistas
Plasticity and Genotype 3 Environment Interactions for Locomotion in Drosophila melanogaster Larvae
Fecha
2012Registro en:
Behav Genet (2012) 42:162–169
DOI 10.1007/s10519-011-9490-1
Autor
Pino Castillo, Francisco del
Godoy Herrera, Raúl
Salgado, Erika
Institución
Resumen
Locomotion is a primary means by which animals
interact with the world. To understand the contribution
of genotype 9 environment interactions to individual
differences in D. melanogaster larval locomotion we
investigated phenotypic sensitivity to environmental
changes in four strains of this species and their F1 hybrids.
We also investigated to what extent flexibility and plasticity
of locomotion depend upon larval age. Specifically,
we examined larval locomotion at 48 and 96 h of development
on three different substrates. Locomotion was
influenced by the structure of the substrate, but this
depended on both the genotype and larval age. At 48 h of
larval development phenotypic variation in locomotion was
attributable to both genotype 9 environment interactions
and genotypic differences among the larvae, while at 96 h
of age, differences were mainly due to genotype 9 environment
interactions. An analysis of variance of the 4 9 4
diallel cross made at 48 and 96 h of development showed,
depending on the cross, either dominance to increase/
decrease locomotion, overdominance to increase/decrease
locomotion, or no dominance to increase/decrease locomotion.
Furthermore, the diversity of behavioral responses
in the F1 hybrids was greater at 96 than at 48 h of larval
development. Our results demonstrate that genotype
9 environment interactions result in plasticity of D.
melanogaster larval locomotion, which makes sense in
light of the fact that larvae, in the wild, develop in heterogeneous
and rapidly changing environments.