Chilton N B, Gasser R B, Beveridge I
Department of Veterinary Science, University of Melbourne, Werribee, Victoria, Australia.
Int J Parasitol. 1997 Dec;27(12):1481-94. doi: 10.1016/s0020-7519(97)00134-3.
The sequence of the second internal transcribed spacer of the ribosomal DNA was determined for the following strongyloid nematodes: Cylicocyclus insignis, Chabertia ovina, Oesophagostomum venulosum, Cloacina communis, Cloacina hydriformis, Labiostrongylus labiostrongylus, Parazoniolaimus collaris, Macropostrongylus macropostrongylus, Macropostrongylus yorkei, Rugopharynx australis, Rugopharynx rosemariae, Macropostrongyloides baylisi, Oesophagostomoides longispicularis and Paramacropostrongylus toraliformis, and compared with published sequences for species of Strongylus and for Hypodontus macropi. The resultant phylogenetic trees supported current hypotheses based on morphological evidence for the separation of the families Strongylidae and Chabertiidae, but did not support the separation of the endemic Australian genera as a distinctive clade within the Chabertiidae. The implications of this finding for the phylogenetic origins of the Australian strongyloids are discussed.
测定了以下类圆线虫核糖体DNA第二内部转录间隔区的序列：微小圆环线虫、绵羊夏伯特线虫、有齿食道口线虫、普通腔环线虫、水形腔环线虫、唇形强线虫、领副带线虫、大后圆线虫、约克大后圆线虫、澳洲皱咽线虫、罗斯玛丽皱咽线虫、贝利西类大后圆线虫、长刺类食道口线虫和环形拟大后圆线虫，并与已发表的圆线虫属物种和大乳头副齿线虫的序列进行了比较。由此产生的系统发育树支持了基于形态学证据的关于圆线科和夏伯特科分类的当前假说，但不支持将澳大利亚特有的属作为夏伯特科内一个独特的进化枝进行分类。讨论了这一发现对澳大利亚类圆线虫系统发育起源的影响。
