Biomedical subjects

R Godoy-Herrera

Publications and source records attributed to R Godoy-Herrera.

5 recordsLinked to original sources

PubMed1996

Abnormal development of the locomotor activity in yellow larvae of Drosophila: a cuticular defect?

The yellow (y) mutation of Drosophila melanogaster affects the development of behavior and morphology. We have analyzed some behavioral and morphological parameters during the development of y mutants. Wild-type third instar larvae move in straighter paths than larvae of the same age homozygous for the y mutation. At 96 h of age, the tracks of y larvae have 10 times as many loops as tracks of wild-type larvae, and at 120 h of age, y larvae show bending behavior about 2.5 times more frequently than do wild-type. Consequently, they do not disperse as much as wild-type larvae. Concomitant with the behavioral changes, the larvae present a defect in the morphology of large chaetae in the larval denticle belts, particularly of 2nd and 3rd instars, both with light and scanning electron microscopes. These results suggest that a cuticular defect is probably involved in the abnormal locomotor activity observed in y larvae of Drosophila melanogaster.

Animals↗

PubMed1994

Biometrical analysis of larval digging behavior in Drosophila melanogaster.

Digging behavior of D. melanogaster larvae increases as larval development proceeds. Diallel crosses were made to analyze genetically digging behavior at 72 and 108 h of larval age. Additive and dominance variation was found, dominance being principally to dig. Dominance to dig is higher at 108 than 72 h of development; additivity does not substantially change between these two larval ages. At 72 h of larval age, depending on the cross, I found (i) dominance to dig, (ii) dominance to nondig, (iii) overdominance to dig, and (iv) no dominance to dig. At 108 h of larval development I detected (i) dominance to dig and (ii) overdominance to dig. Thus, diversity of response in the F1 was greater at 72 than 108 h of larval development. These age-related changes in larval digging behavior of D. melanogaster seem to reflect epigenetic changes in the patterns of gene expressions.

Animals↗

PubMed1994

Disruption of the structure of larval foraging behaviour in interspecific hybrids in Drosophila.

Larval foraging behaviour in two sibling species, Drosophila pavani and Drosophila gaucha belonging to the mesophragmatica species group, is described. Interspecific hybrid larvae derived from both reciprocal crosses of the parent species show disruption in the organization of their behaviour, leading to lower mean feeding rates. This, together with interactions involving biotic residues, described elsewhere, is likely under competitive conditions to contribute to reduced fitness of the hybrids relative to the parent species.

Animals↗

PubMed1978

Selection for digging behavior in Drosophila melanogaster larvae.

The genetics of the digging behavior of Drosophila melanogaster larvae was studied through selective breeding. Selection for low digging activity was successful, but selection for high digging activity was not. Selection for low and high digging activity affected another behavior, namely the choice of a pupation site. Digging behavior appears to be under polygenic control.

Animals↗

PubMed1977

Inter- and intrapopulational variation in digging in Drosophila melanagaster larvae.

The digging behavior of larvae from the following strains of Drosophila melanogaster was studied: Oregon R-c, taxi, yellow, and vestigial. It was found that the time of stay of preadults in the culture medium, the number of larvae, and the illumination conditions can modify this behavior. The presence of this characteristic depends on the genetic composition of the population: the larvae of each strain used exhibited their own particular pattern of dispersal throughout the culture medium, independent of the experimental conditions under which this behavior was surveyed.

Animals↗