scholarly journals Influence of Ocular Morphology on Mating Speed and Duration of Copulation in Drosophila Melanogaster

1987 ◽  
Vol 40 (3) ◽  
pp. 271 ◽  
Author(s):  
Concepción de Juana ◽  
M Dolores Ochando
Keyword(s):  
Drosophila Melanogaster ◽  
Sexual Behaviour ◽  
Sensory Organs ◽  
Mating Speed ◽  
Duration Of Copulation ◽  
Two Parameters

The possible effects on the sexual behaviour of D. melanogaster of mutants in which sensory organs needed for mating are affected were studied. Four ocular mutants were used and two parameters of sexual behaviour were measured: mating speed and duration of copulation. A clear influence of the mutants was observed on mating speed but not on duration of copulation. The influence on mating speed was greater for the mutants with more severe morphological phenotypes.

A genetic correlation between the sexes for mating speed in Drosophila melanogaster

1992 ◽  
Vol 43 (3) ◽  
pp. 389-396 ◽  
Author(s):  
Marina Stamenkovic-Radak ◽  
Linda Partridge ◽  
Marko Andjelkovic
Keyword(s):  
Drosophila Melanogaster ◽  
Genetic Correlation ◽  
Mating Speed

Proneural genes influence gliogenesis in Drosophila

Development ◽  
1995 ◽  
Vol 121 (2) ◽  
pp. 429-438 ◽  
Author(s):  
A. Giangrande
Keyword(s):  
Nervous System ◽  
Drosophila Melanogaster ◽  
Genetic Analysis ◽  
Glial Cells ◽  
Sensory Organ ◽  
Loss Of Function ◽  
Sensory Organs ◽  
Genetic Pathway ◽  
Organ Differentiation

Fly glial cells in the wing peripheral nervous system of Drosophila melanogaster originate from underlying epithelial cells. Two findings indicate that gliogenesis is closely associated with neurogenesis. First, it only occurs in regions that also give rise to sensory organs. Second, in mutants that induce the development of ectopic sensory organs glial cells develop at new positions. These findings prompted a genetic analysis to establish whether glial and sensory organ differentiation depend on the same genes. Loss of function mutations of the achaete-scute complex lead to a significant reduction of sensory bristles and glial cells. Genes within the complex affect gliogenesis with different strength and display some functional redundancy. Thus, neurogenesis and gliogenesis share the same genetic pathway. Despite these similarities, however, the mechanism of action of the achaete-scute complex seems to be different in the two processes. Neural precursors express products of the complex, therefore the role of these genes on neurogenesis is direct. However, markers specific to glial cells do not colocalize with products of the achaete-scute complex, showing that the complex affects gliogenesis indirectly. These observations lead to the hypothesis that gliogenesis is induced by the presence of sensory organ cells, either the precursor or its progeny.

QUANTITATIVE GENETICS OF FERTILITY. IV. CHROMOSOMES AFFECTING EGG PRODUCTION IN DROSOPHILA MELANOGASTER

1972 ◽  
Vol 14 (1) ◽  
pp. 147-156 ◽  
Author(s):  
Malcolm Fitz-Earle
Keyword(s):  
Drosophila Melanogaster ◽  
Quantitative Genetics ◽  
Egg Production ◽  
Inbred Lines ◽  
Egg Laying ◽  
Specific Chromosome ◽  
New Model ◽  
Rate Of Decline ◽  
Two Parameters

Chromosomal combinations of the X, 2 and 3 chromosomes were synthesized from two inbred lines of Drosophila Melanogaster. Egg production determinations over the productive lifetime of sibling matings from the lines were fitted to a new model of lifetime egg production. The two parameters in the model which had been shown to be essentially genetic were related to specific chromosome effects. Chromosomes X and 3 but not 2, influenced the rate of decline in oviposition α and the time of cessation of egg-laying tq. In addition, interactions of chromosomes 2 and 3 upon these parameters were detected. The chromosome or interaction between chromosomes which decreased α concomitantly increased tq and vice versa.

scholarly journals Genetic Heterogeneity Among the Founders of Laboratory Populations of Drosophila Melanogaster I. Mating Behaviour

1967 ◽  
Vol 20 (6) ◽  
pp. 1193 ◽  
Author(s):  
Sally M W Hosgood ◽  
PA Parsons
Keyword(s):  
Drosophila Melanogaster ◽  
Genetic Heterogeneity ◽  
Mating Behaviour ◽  
Duration Of Copulation ◽  
Laboratory Populations

Single inseminated founder females in D. mBlanogastB'I' derived from the same population have led to genetically discrete strains for two behavioural traits: the percentage of pairs mated in 60 min, and duration of copulation. The effect of the founder females persists for many generations. These results are in agreement with earlier work on scutellar chaetae.

The effect of developmental temperature on population flexibility in Drosophila melanogaster and D. simulans

1978 ◽  
Vol 26 (1) ◽  
pp. 105 ◽  
Author(s):  
JA Mckenzie
Keyword(s):  
Drosophila Melanogaster ◽  
Sex Ratio ◽  
Adult Development ◽  
Temperature Effects ◽  
Developmental Time ◽  
Extreme Temperatures ◽  
Mating Speed ◽  
Strain Effects ◽  
Developmental Temperature ◽  
Temperature Strain

Ten strains each of D. melanogaster and D. simulans were derived from single inseminated females of the same population. For each strain the influence of developmental temperatures in the range 12-30�C was considered for developmental time, egg to adult development percentage, sex ratio, longevity of adults, mating speed, fecundity and fertility. The species showed similar responses for all characters, although for the latter four D. simulans was more affected by extreme temperatures. Analyses of variance demonstrated temperature, strain, and temperature x strain effects to be generally significant. For sex ratio, however, temperature effects alone were significant. The results are discussed in relation to the level of genetical integration existing in a population and how such integration allows for considerable population flexibility.

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