浙江农业学报

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福建茶区小贯小绿叶蝉rDNA序列分析及形态再描述

  

  1. (厦门大学 生命科学学院,福建 厦门 361102)
  • 出版日期:2015-10-25 发布日期:2015-10-20

rDNA sequence analysis and morphological redescription of  Empoasca onukii from the tea growing area of Fujian#br#

  1. (School of Life Sciences, Xiamen University, Xiamen 361102, China)
  • Online:2015-10-25 Published:2015-10-20

摘要: 重新描述了小贯小绿叶蝉的形态结构,尤其是头部色斑、翅脉、腹部内突、下生殖板及其刚毛着生位置,并增加了足部(刺毛列)特征描述。通过PCR技术克隆得到该物种的rDNA序列,包括部分18S(1 843 bp)和28S序列(667 bp)以及完整的58S(155 bp)、ITS1(3 114 bp)和ITS2序列(1 008 bp)。序列分析表明,18S,58S,28S与其他物种间具有90%~95%的序列一致性;而ITS1和ITS2序列变异性非常大。碱基组成比率分析显示ITS1以及ITS2具有AT偏好性,前者A+T占660%,后者占651%。与亲缘种的比较分析显示ITS1和ITS2具有丰富的多态位点,并且ITS2更适用于近缘种的分子鉴定。

关键词: 小贯小绿叶蝉, 形态, rDNA, ITS2

Abstract: The morphological structures of Empoasca onukii, the cephalic splashes, vein, abdominal apodemes, subgenital plate and the arrangement of its bristles, and the characteristics of legs were redescribed, especially the arrangement of spines were added. Ribosomal DNA (rDNA) including partial of 18S (1 843 bp), 28S (667 bp) and complete 58S (155 bp), ITS1 (3 114 bp), ITS2 (1 008 bp) were isolated by PCR technology. Sequence analysis indicated that 18S, 58S and 28S had high sequence identity (90%-95%) with other insects; however, ITS1 and ITS2 showed much variability. The analysis of base composition showed that ITS1 and ITS2 were more preferences for AT (contained 660% and 651% A+T, respectively). Comparison with the phylogenetic species revealed that ITS1 and ITS2 from E.onukii had rich polymorphic loci and ITS2 was more suitable for molecular identification of closely related species.

Key words: Empoasca onukii, morphology, rDNA, ITS2