›› 2012, Vol. 55 ›› Issue (4): 482-487.doi:

• 简报 • 上一篇    下一篇

三种稻飞虱体内类酵母共生菌18S rDNA和 ITS5.8S rDNA序列克隆及进化分析

周岩岩, 董胜张, 白旭, 俞晓平   

  • 收稿日期:2011-12-05 修回日期:2012-03-28 出版日期:2012-04-20 发布日期:2012-04-20
  • 通讯作者: 俞晓平 E-mail:yxp@cjlu.edu.cn
  • 作者简介:周岩岩, 男, 1986年生, 硕士研究生, 研究方向为昆虫分子生态学, E-mail: zhouyanyan861205@163.com
  • 基金资助:

     国家重点基础研究发展规划(“973”计划)项目(2012CB114105, 2011CB111602); 浙江省自然科学基金重点项目(Z3100594)

Phylogenetic position of yeast-like symbiotes from three rice planthoppers (Homoptera: Delphacidae) based on 18S rDNA and ITS-5.8S rDNA sequences

ZHOU Yan-Yan, DONG Sheng-Zhang, BAI Xu, YU Xiao-Ping   

  • Received:2011-12-05 Revised:2012-03-28 Online:2012-04-20 Published:2012-04-20
  • Contact: YU Xiao-Ping E-mail:yxp@cjlu.edu.cn
  • About author: zhouyanyan861205@163.com

摘要: 为研究水稻3种主要害虫灰飞虱Laodelphax striatellus、 褐飞虱Nilaparvata lugens和白背飞虱Sogatella furcifera体内类酵母共生菌(yeast-like symbiotes, YLS)的种属地位及与寄主的进化关系, 测定了其体内YLS的18S rDNA及ITS-5.8S rDNA的全长序列。基于3种稻飞虱体内YLS的18S rDNA序列比对表明, 褐飞虱YLS和白背飞虱YLS的一致性比其与灰飞虱YLS的高(褐飞虱YLS和白背飞虱YLS为98.91%, 灰飞虱YLS和褐飞虱YLS为95.74%, 灰飞虱YLS和白背飞虱YLS为96.02%), 而基于ITS-5.8S rDNA序列比对, 灰飞虱YLS和白背飞虱YLS的一致性比其与褐飞虱YLS的要高(白背飞虱YLS和灰飞虱YLS为99.57%, 灰飞虱YLS和褐飞虱YLS为91.91%, 白背飞虱YLS和褐飞虱YLS为90.46%)。基于真菌18S rDNA和ITS-5.8S rDNA的系统发育树均表明, 3种稻飞虱体内YLS与其他已知真菌进化关系较远。本研究证实了昆虫真菌类共生菌与寄主形成了长期的进化关系, 从而形成了不同于已知真菌的分类地位。

关键词: 稻飞虱, 灰飞虱, 褐飞虱, 白背飞虱, 酵母类共生菌, 18S rDNA, ITS-5.8S rDNA, 系统发育分析

Abstract: In order to study the species status of yeast-like symbiotes (YLS) from three rice planthoppers (Laodelphax striatellus, Nilaparvata lugens and Sogatella furcifera) and the evolutionary relationship of YLS with insect hosts, the complete sequences of 18S rDNA and ITS-5.8S rDNA of YLS from the three planthoppers were determined. Sequence identity comparison of YLS from rice planthoppers was conducted based on 18S rDNA and ITS-5.8S rDNA sequences. The results showed that YLS of N. lugens has a higher identity to that of S. furcifera (98.91%) than to that of L. striatellus (95.74%) according to 18S rDNA sequences, but YLS of L. striatellus has a higher identity to that of S. furcifera (99.57%) than that to N. lugens (91.91%) according to the ITS-5.8S rDNA sequences. Phylogenetic analysis based on both 18S rDNA and ITS-5.8S rDNA showed that YLS from three rice planthoppers has no obvious identity to other known fungi. The results suggest that insect YLS have a close evolutionary relationship with hosts and form a taxonomic group different from other fungi.

Key words: Rice planthopper, Laodelphax striatellus, Nilaparvata lugens, Sogatella furcifera, yeast-like symbiotes (YLS), 18S rDNA, ITS-5.8S rDNA, phylogenetic analysis