SIBLING SPECIES WITHIN MACROPOSTRONGYLOIDES-BAYLISI (NEMATODA, STRONGYLOIDEA) FROM MACROPODID MARSUPIALS
SIBLING SPECIES WITHIN MACROPOSTRONGYLOIDES-BAYLISI (NEMATODA, STRONGYLOIDEA) FROM MACROPODID MARSUPIALS
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DOI：
10.1016/0020-7519(93)90094-f
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发表时间：
1993-02-01
影响因子：
4
通讯作者：
ANDREWS, RH
中科院分区：
文献类型：
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作者：
BEVERIDGE, I;CHILTON, NB;ANDREWS, RH
对4个不同种或亚种贝氏大圆线虫的27个酶位点进行了电泳分析。结果显示，在巨巨猿和粗壮猿中存在两个物种，即M.r. erubescens和M.r. parryi，它们在33%的位点上存在固定的遗传差异。来自昆士兰州的健壮线虫和来自南澳大利亚的健壮线虫两个亚种的线虫种群在27个位点中有2个（7.4%）存在固定的遗传差异，被认为属于同一物种。在parryi线虫和robustus线虫之间没有检测到固定的遗传差异。形态学数据的判别函数分析将96%的标本分配到根据其获得的宿主物种或亚种定义的群体中。这分离的马。然而，Baylisi进入宿主特异性组并不完全与电泳数据相关。巨犀中的baylisi种在遗传上与粗犀/粗犀的兄弟种差异更大。而不是一种相关但形态不同的线虫，Ma。山口菌属（yamagutii）这表明寄主和寄生虫在遗传水平上的进化相似，而形态差异并没有反映出来。
Macropostrongyloides baylisi from four different species or subspecies of host were analysed electrophoretically at 27 enzyme loci. The results revealed the existence of two species, one in Macropus giganteus and the other in M. robustus robustus, M.r. erubescens and M.r. parryi, that had fixed genetic differences at 33% of loci. Populations of nematodes from two subspecies of M. robustus, M.r. robustus from Queensland and M.r. erubescens from South Australia, had fixed genetic differences at two (7.4%) of 27 loci and were considered to belong to the same species. No fixed genetic differences were detected between nematodes from M. parryi and Mr. robustus. A discriminant function analysis of morphological data assigned 96% of specimens to groups defined on the basis of the host species or subspecies from which they were obtained. This separation of Ma. baylisi into host-specific groups did not, however, totally correlate with the electrophoretic data. The species of M. baylisi in M. giganteus was genetically more distinct from the sibling species in M. robustus/M. parryi than to a related but morphologically dissimilar nematode, Ma. yamagutii from M. fuliginosus. This suggests an evolutionary parallel between host and parasite at the genetic level which is not reflected by morphological differences.