Gene Function Prediction Based on Developmental Transcriptomes of the Two Sexes in C. elegans.

Area of Science:

• Developmental Biology
• Neuroscience
• Genomics

Background:

• Previous studies on C. elegans gene expression primarily focused on hermaphrodites.
• A significant number of genes in C. elegans lack clear functional annotation.
• Male C. elegans undergo substantial nervous system development, including neurogenesis and synaptogenesis.

Purpose of the Study:

• To conduct a comprehensive comparison of whole-animal RNA-sequencing (RNA-seq) transcriptomes between male and hermaphrodite C. elegans.
• To identify genes with differential expression related to male sexual development and nervous system expansion.
• To discover novel genes and functions, particularly those involved in male-specific traits and synapse formation.

Main Methods:

• Whole-animal RNA sequencing (RNA-seq) was performed on C. elegans males and hermaphrodites across developmental stages (late L3 to young adulthood).
• Differential gene expression analysis was employed to identify genes with significantly higher expression in males.
• Co-expression network analysis was used to infer gene functions and identify regulatory networks.

Main Results:

• 1,751 genes were identified as having higher expression levels in males compared to hermaphrodites.
• Key transcription factors essential for male genital structure differentiation were identified.
• Novel semen proteins and candidate genes involved in synapse function were discovered.
• The dataset demonstrated potential to improve gene predictions when compared to existing tools.

Conclusions:

• The study provides a valuable transcriptomic resource for C. elegans research, particularly for male development and neurobiology.
• The identified genes offer new candidates for understanding male-specific traits and synaptic development.
• This dataset significantly expands the potential for future gene discovery and functional annotation in C. elegans.