Comparative transcriptome analysis reveals host-associated differentiation in Chilo suppressalis (Lepidoptera:...

Area of Science:

• * Entomology
• * Molecular Biology
• * Pest Management

Background:

• * The striped stem borer (Chilo suppressalis) is a major rice pest.
• * This insect also infests water-oat (Zizania latifolia), a vegetable crop.
• * C. suppressalis exhibits improved growth and survival on water-oat compared to rice.

Purpose of the Study:

• * To investigate the molecular mechanisms of C. suppressalis adaptation to water-oat.
• * To analyze midgut transcriptome responses of C. suppressalis larvae fed on rice versus water-oat.

Main Methods:

• * Transcriptome sequencing of C. suppressalis larvae reared on rice and water-oat.
• * Differential gene expression analysis to identify key molecular changes.

Main Results:

• * 1,633 differentially expressed genes were identified between the two host plants.
• * A higher number of genes were upregulated in larvae feeding on water-oat.
• * Upregulated genes were primarily involved in digestion and detoxification.
• * Downregulated genes were mainly ribosomal genes.

Conclusions:

• * Transcriptional regulation of digestive and detoxification genes aids adaptation to new host plants.
• * Downregulation of ribosomal genes may correlate with enhanced development on water-oat.
• * These findings highlight the role of gene expression in C. suppressalis host plant adaptation.