›› 2004, Vol. 47 ›› Issue (5): 639-644.

• 研究论文 • 上一篇    下一篇

诊断引物应用于我国三种重要赤眼蜂分子鉴定的研究

耿金虎, 李正西, 沈佐锐   

  • 出版日期:2004-10-20 发布日期:2004-10-20

Application of species-specific primers to molecular identification of three important Trichogramma species (Hymenoptera: Trichogrammatidae) in China

GENG Jin-Hu, LI Zheng-Xi, SHEN Zuo-Rui   

  • Online:2004-10-20 Published:2004-10-20
  • Contact: SHEN Zuo-Rui

摘要: 本研究根据螟黄赤眼蜂rDNA-ITS2序列设计了螟黄赤眼蜂Trichogramma chilonis Ishii特异引物,同时采用文献中发表的松毛虫赤眼蜂Trichogramma dendrolimi Matsumura 和玉米螟赤眼蜂Trichogramma ostriniae Pang et Chen的特异引物以及赤眼蜂属Trichogramma 特异引物对赤眼蜂成虫和寄主卵样品进行了PCR特异扩增分析。结果表明,采用上述特异引物可从单头蜂稳定地扩增出明显的目的DNA条带,并且分子鉴定结果与形态学鉴定结果完全吻合。因此,采用上述3对特异引物可以实现对我国3种重要赤眼蜂种,即松毛虫赤眼蜂、螟黄赤眼蜂和玉米螟赤眼蜂的分子鉴定。

关键词: 松毛虫赤眼蜂, 螟黄赤眼蜂, 玉米螟赤眼蜂, 诊断引物, 分子鉴定, rDNA-ITS2

Abstract: Species-specific primers of Trichogramma chilonis Ishii has been designed based on its rDNA-ITS2 sequence in this paper, and the specific primers of T. Dendrolimi Matsumura, T. ostriniae Pang et Chen and the genus Trichogramma were retrieved from previously published articles. All of the specific primers were then applied to identification of multiple Trichogramma and host eggs samples through PCR assays. The results showed that our methods could produce clear, unique and reproducible target DNA bands from individual adult wasp. Furthermore, the species-specific primer-based results were fully consistent with those derived from morphology-based ones. Thus, the molecular identification of the three important Trichogramma species in China, namely T. dendrolimi, T. chilonis and T. ostriniae, using the abovedescribed diagnostic primers was proved feasible.

Key words: Trichogramma dendrolimi, T. chilonis, T. Ostriniae, diagnostic primers, molecular identification, rDNA-ITS2