Effect of anti-juvenile hormone agent, KK-42 on the incorporation rate of radioactive glycine and biosynthesis of silk proteins of silkworm, Bombyx mori L.

Abstract

The effects of anti-juvenile hormone agent, KK-42 on incorporation rate of radioactive glycine in cocoon crop production and biosynthesis of silk proteins of silkworm, Bombyx mori L. were studied in a popular bivoltine silkworm hybrid, Xinhang (Chinese) × Keming (Japanese). Administration of KK-42 on first day larvae of fourth instar induced 100% trimolters, and the total larval duration was shortened by four days, which has marked advantages in sericulture. The impact of KK-42 on enhanced incorporation rate of radioactive glycine, cocoon weight, RNA content, and fibroin content was significant compared to control, which leads to superior quality of silk. This has a significant economic importance in the reeling industry.

Keywords:

• anti-juvenile hormone agent (KK-42)
• fibroin
• sericin
• silk gland
• ³H-glycine
• RNA
• silkworm
• Bombyx mori L.