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首页> 外文期刊>Parasitology >Evolutionary diversity in polystomatids infecting tetraploid and octoploid Xenopus in East African highlands: Biological and molecular evidence
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Evolutionary diversity in polystomatids infecting tetraploid and octoploid Xenopus in East African highlands: Biological and molecular evidence

机译：东非高地感染四倍体和八倍体非洲爪蟾的多类细菌的进化多样性：生物学和分子证据

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摘要

Species of Protopolystoma are monogenean flukes that only infect allopolyploid hosts in the anuran genus Xenopus. Multivariate analyses of morphometric sclerite characters in the nominal species Protopolystoma simplicis suggest that morphologically distinguishable populations occur in the tetraploid host, Xenopus laevis victorianus, and in each of the octoploid hosts, X. vestitus and X. wittei. The species-level divergence of a lineage specific to X. laevis is supported by sequence variation in the mitochondrial cytochrome c oxidase subunit 1 (cox1) gene. Protopolystoma simplicis from X. laevis is redesignated P. microsclera n. sp., with P. simplicis being retained for populations in octoploid hosts. This division is consistent with large differences in egg hatching schedule, fixed differences at the mannose-6-phosphate isomerase and fumarate hydratase loci, and host-specificity in experimental analyses. Although the respective P. simplicis populations in X. vestitus and X. wittei also show significantdiversity in allozyme expression, morphometrics and egg hatching schedule, they are retained in the same species because their level of mitochondrial DNA divergence is similar to that found within other Protopolystoma species. The consequences of splitting P. simplicis for a recent interpretation of the origin of Protopolystoma faunas in octoploid Xenopus spp. is discussed. 2007 Cambridge University Press.
机译：原生多肉瘤的物种是单基因吸虫，仅感染无尾类非洲爪蟾属的同种多倍体宿主。对标称物种原始原型简化形态的硬粒形态形态特征的多变量分析表明，在四倍体寄主Xenopus laevis victorianus和每一个八倍体寄主X.vesititus和X.wittei中都有形态上可区分的种群。线粒体细胞色素C氧化酶亚基1（cox1）基因的序列变异支持X.laevis特有谱系的物种水平差异。 X. laevis的原初胃造口被重新命名为P. microscleran。 sp。，在八倍体宿主中只保留简单的毕赤酵母。该划分与卵孵化时间表的巨大差异，6-磷酸甘露糖异构酶和富马酸盐水合酶基因座的固定差异以及实验分析中的宿主特异性相一致。尽管X.vesititus和X.wittei各自的P. simplicis种群在同工酶表达，形态计量学和卵孵化时间表上也显示出显着多样性，但它们保留在同一物种中，因为它们的线粒体DNA分化水平与其他原生多肉瘤相似。种类。对简单八倍体非洲爪蟾原裂口动物区系的起源的最新解释的分裂简单体育的后果。讨论。 2007剑桥大学出版社。

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