赫坎按蚊种群近缘种核糖体基因内转录第二间隔区序列分析

目的　分析赫坎按蚊种群内4个近缘种核糖体基因内转录第二间隔区(rDNAITS2)特征。　方法　采用特异性ITS2引物对中华按蚊和嗜人按蚊江苏实验株、辽宁省沈阳市和朝鲜开城现场捕获的嗜人按蚊、八代按蚊和雷氏按蚊rDNAITS2进行PCR扩增、基因测序和限制性内切酶酶切位点图谱分析。　结果与结论　赫坎按蚊种群近缘种中华按蚊、嗜人按蚊、八代按蚊和雷氏按蚊rDNAITS2分别为472、452、456和456bp,各基因序列存在明显差异并存在不同的限制性内切酶酶切位点

Analysis of the Sequences of the Ribosomal DNA ITS2 Region for Differenciating Anopheline Mosquitoes within Hyrcanus Group

Objective To analyze the genetic characteristics of ribosomal DNA ITS 2 region for differenciating anopheline mosquitoes within Hyrcanus group. Methods The ribosomal DNA ITS 2 region of both laboratory line and filed collected An. anthropophagus and An. sinensis as well as the field collected An. yatsushiroensis and An. lester i were amplified and sequenced. The sequencing data were then analyzed for the restriction mapping using Omega Sequencing analysis program. Results and Conclusion The length of the sequences of An. sinensis, An. anthropophagus, An. yatsushiroensis and An. lesteri are 472, 452, 456 and 456 bp respectively. The restriction mapping showed that there were different restriction digesting sites among the ribosomal DNA ITS2 region sequences from An. sinensis, An. anthropophagus, An. yatsushiroensis and An. lesteri . On the basis of the sequence differences among the anopheline species within Hyrcanus group, it is possible to develop new technique for genetic identification of anopheline mosquitoes.