Isolation of Aggressive Behavior Mutants in Drosophila Using a Screen for Wing Damage.

Area of Science:

• Behavioral Genetics
• Neuroscience
• Animal Behavior

Background:

• Aggression is a complex behavior with limited identified genetic underpinnings.
• Screening for genes affecting aggression is challenging due to phenotype complexity.

Purpose of the Study:

• To develop a novel screening method for identifying genes that influence aggression.
• To identify specific genetic mutations associated with increased aggressive behavior in Drosophila melanogaster.

Main Methods:

• Utilized a wing-damage phenotype in group-housed Drosophila melanogaster males as a screen.
• Screened approximately 1400 chemically mutagenized fly strains.
• Employed whole-genome sequencing and genomic duplication rescue to identify mutations.

Main Results:

• Identified a wing-damage phenotype in aggressive male fruit flies.
• Discovered approximately 40 mutant strains with significant wing damage, five with increased aggression.
• Identified a novel mutation in the voltage-gated potassium channel Shaker (Sh) associated with increased aggression.

Conclusions:

• A simple wing-damage screen effectively identifies mutations affecting aggressive behavior.
• The Shaker gene and its mutations play a role in modulating aggression in Drosophila melanogaster.
• This approach facilitates the dissection of molecular mechanisms underlying complex social behaviors like aggression.