scholarly journals Mating behaviour stability in strains of Drosophila melanogaster which have been kept under constant darkness for about 27 years.

1985 ◽  
Vol 60 (4) ◽  
pp. 281-291 ◽  
Author(s):  
D. M. LAMBERT ◽  
A. A. HARPER
Keyword(s):  
Drosophila Melanogaster ◽  
Mating Behaviour ◽  
Constant Darkness

scholarly journals Flexible memory controls sperm competition responses in male Drosophila melanogaster

2018 ◽  
Vol 285 (1879) ◽  
pp. 20180619 ◽  
Author(s):  
J. Rouse ◽  
K. Watkinson ◽  
A. Bretman
Keyword(s):  
Drosophila Melanogaster ◽  
Environmental Change ◽  
Sperm Competition ◽  
Learning And Memory ◽  
Mating Behaviour ◽  
Brain Structures ◽  
Plastic Behaviour ◽  
Rival Male ◽  
Lag Times ◽  
Underlying Mechanisms

Males of many species use social cues to predict sperm competition (SC) and tailor their reproductive strategies, such as ejaculate or behavioural investment, accordingly. While these plastic strategies are widespread, the underlying mechanisms remain largely unknown. Plastic behaviour requires individuals to learn and memorize cues associated with environmental change before using this experience to modify behaviour. Drosophila melanogaster respond to an increase in SC threat by extending mating duration after exposure to a rival male. This behaviour shows lag times between environmental change and behavioural response suggestive of acquisition and loss of memory. Considering olfaction is important for a male's ability to assess the SC environment, we hypothesized that an olfactory learning and memory pathway may play a key role in controlling this plastic behaviour. We assessed the role of genes and brain structures known to be involved in learning and memory. We show that SC responses depend on anaesthesia-sensitive memory, specifically the genes rut and amn . We also show that the γ lobes of the mushroom bodies are integral to the control of plastic mating behaviour. These results reveal the genetic and neural properties required for reacting to changes in the SC environment.

scholarly journals Mating behaviour and chaete number in Drosophila melanogaster

Hereditas ◽  
2009 ◽  
Vol 74 (1) ◽  
pp. 152-154 ◽  
Author(s):  
Marianne Rasmuson ◽  
Sven-Erik Åslund
Keyword(s):  
Drosophila Melanogaster ◽  
Mating Behaviour

scholarly journals Mesencephalic Astrocyte-Derived Neurotrophic Factor Regulates Morphology of Pigment-Dispersing Factor-Positive Clock Neurons and Circadian Neuronal Plasticity in Drosophila melanogaster

2021 ◽  
Vol 12 ◽  
Author(s):  
Wojciech Krzeptowski ◽  
Lucyna Walkowicz ◽  
Ewelina Krzeptowska ◽  
Edyta Motta ◽  
Kacper Witek ◽  
...  
Keyword(s):  
Drosophila Melanogaster ◽  
Visual System ◽  
Neurotrophic Factor ◽  
Optic Lobe ◽  
Dendritic Tree ◽  
Constant Darkness ◽  
Normal Morphology ◽  
Pigment Dispersing Factor ◽  
Group 1 ◽  
Lateral Neurons

Mesencephalic Astrocyte-derived Neurotrophic Factor (MANF) is one of a few neurotrophic factors described in Drosophila melanogaster (DmMANF) but its function is still poorly characterized. In the present study we found that DmMANF is expressed in different clusters of clock neurons. In particular, the PDF-positive large (l-LNv) and small (s-LNv) ventral lateral neurons, the CRYPTOCHROME-positive dorsal lateral neurons (LNd), the group 1 dorsal neurons posterior (DN1p) and different tim-positive cells in the fly’s visual system. Importantly, DmMANF expression in the ventral lateral neurons is not controlled by the clock nor it affects its molecular mechanism. However, silencing DmMANF expression in clock neurons affects the rhythm of locomotor activity in light:dark and constant darkness conditions. Such phenotypes correlate with abnormal morphology of the dorsal projections of the s-LNv and with reduced arborizations of the l-LNv in the medulla of the optic lobe. Additionally, we show that DmMANF is important for normal morphology of the L2 interneurons in the visual system and for the circadian rhythm in the topology of their dendritic tree. Our results indicate that DmMANF is important not only for the development of neurites but also for maintaining circadian plasticity of neurons.

scholarly journals A gene responsible for a cuticular hydrocarbon polymorphism in Drosophila melanogaster

1999 ◽  
Vol 73 (3) ◽  
pp. 189-203 ◽  
Author(s):  
JERRY A. COYNE ◽  
CLAUDE WICKER-THOMAS ◽  
JEAN-MARC JALLON
Keyword(s):  
Drosophila Melanogaster ◽  
Mating Behaviour ◽  
Polytene Chromosomes ◽  
Cuticular Hydrocarbon ◽  
Sexual Isolation ◽  
Detectable Effect ◽  
Desaturase Gene ◽  
The Difference ◽  
The Right

Drosophila melanogaster is polymorphic for the major cuticular hydrocarbon of females. In most populations this hydrocarbon is 7,11-heptacosadiene, but females from Africa and the Caribbean usually possess low levels of 7,11-heptacosadiene and high quantities of its position isomer 5,9-heptacosadiene. Genetic analysis shows that the difference between these two morphs is due to variation at a single segregating factor located on the right arm of chromosome 3 near map position 51·5 and cytological position 87C–D. This is precisely the position of a desaturase gene previously sequenced using primers derived from yeast and mouse, and localized by in situ hybridization to the polytene chromosomes of D. melanogaster. Alleles of this desaturase gene may therefore be responsible for producing the two hydrocarbon morphs. Mating tests following the transfer of these isomers between females of the two morphs show that, in contrast to previous studies, the hydrocarbon profiles have no detectable effect on mating behaviour or sexual isolation.

Molecular and Behavioral Analysis of Four period Mutants in Drosophila melanogaster Encompassing Extreme Short, Novel Long, and Unorthodox Arrhythmic Types

Genetics ◽  
1998 ◽  
Vol 149 (1) ◽  
pp. 165-178
Author(s):  
Melanie J Hamblen ◽  
Neal E White ◽  
Philip T J Emery ◽  
Kim Kaiser ◽  
Jeffrey C Hall
Keyword(s):  
Drosophila Melanogaster ◽  
Constant Darkness ◽  
Aberrant Splicing ◽  
Single Nucleotide ◽  
Long Period ◽  
Single Nucleotide Change ◽  
Short Novel ◽  
Evening Peak ◽  
Period Mutants ◽  
Clock Protein

Abstract Of the mutationally defined rhythm genes in Drosophila melanogaster, period (per) has been studied the most. We have molecularly characterized three older per mutants—perT, perClk, and per04—along with a novel long-period one (perSLIH). Each mutant is the result of a single nucleotide change. perT, perClk, and perSLIH are accounted for by amino acid substitutions; per04 is altered at a splice site acceptor and causes aberrant splicing. perSLIH exhibits a long period of 27 hr in constant darkness and entrains to light/dark (L/D) cycles with a later-than-normal evening peak of locomotion. perSLIH males are more rhythmic than females. perSLIH's clock runs faster at higher temperatures and slower at lower ones, exhibiting a temperature-compensation defect opposite to that of perLong. The per-encoded protein (PER) in the perT mutant cycles in L/D with an earlier-than-normal peak; this peak in perSLIH is later than normal, and there was a slight difference in the PER timecourse of males vs. females. PER in per04 was undetectable. Two of these mutations, perSLIH and perClk, lie within regions of PER that have not been studied previously and may define important functional domains of this clock protein.

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