Protein synthesis inhibition alters Drosophila mating behavior

Area of Science:

• Behavioral Ecology
• Neurobiology
• Genetics

Background:

• Sexual selection drives evolutionary processes.
• Mate choice in Drosophila pseudoobscura is influenced by prior mating experiences.
• Learning and memory mechanisms underlie behavioral plasticity.

Purpose of the Study:

• To investigate the role of protein synthesis in the modification of sexual preference in Drosophila pseudoobscura.
• To determine if cycloheximide (CXM) disrupts learned mating preferences.
• To explore the parallels between changes in sexual preference and memory consolidation.

Main Methods:

• Simultaneous choice tests were used to assess mating preferences of female Drosophila pseudoobscura.
• Protein synthesis inhibition was induced using cycloheximide (CXM).
• Females were exposed to CXM before or after initial copulation with specific male types (AR or or).

Main Results:

• Virgin AR females initially preferred AR males.
• Females that mated with or males subsequently preferred or males, indicating a learned preference.
• CXM exposure after initial copulation reversed the learned preference, favoring AR males.
• CXM exposure before initial copulation did not alter the learned preference for or males.

Conclusions:

• Post-copulatory protein synthesis is crucial for consolidating learned sexual preferences in female Drosophila.
• Cycloheximide disrupts the consolidation of learned mating behaviors, analogous to memory disruption.
• This study provides evidence for a molecular basis of behavioral plasticity in sexual selection.