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Heterogeneity in NTS of rDNA in localized populations of Neurospora

机译:神经孢子虫局部种群中rDNA NTS的异质性

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摘要

Neurospora, a filamentous ascomycete, occurs in tropical climate. We have examined the relationships that exist among wild isolates in local populations of Neurospora by using PCR-RFLP to analyse the Non Transcribed Spacer (NTS) of the rDNA. The size of the NTS was found to be polymorphic. Phylogenetic trees constructed using this data support the hypothesis that mating groups represent monophyletic lineages. Specifically, the results suggest monophyly for N. tetrasperma and N. sitophila, a close relationship between the pseudohomothallic species N. tetrasperma and true heterothallics, and the placement of N. discreta as the most distant among all species. The yellow ecotype of N. intermedia has been assigned a putative phylogenetic position for the first time. Surprisingly, these yellow isolates, considered to be an ecotype of N. intermedia, appear to represent a separate lineage, distinct from a larger N. crassa/N. intermedia clade.
机译:Neurospora,一种丝状子囊菌,发生在热带气候中。我们已经通过使用PCR-RFLP分析rDNA的非转录间隔子(NTS),检查了Neurospora本地种群中野生分离株之间的关系。发现NTS的大小是多态的。使用该数据构建的系统发育树支持以下假设:交配群体代表单系谱系。具体而言,这些结果表明,对四叶猪笼草和嗜山猪笼草具有单亲性,假高齿猪笼草物种和真正的杂菌种之间存在密切的关系,而离散猪笼草在所有物种中距离最远。中间猪笼草的黄色生态型已首次被确定为系统发育位置。令人惊讶的是,这些黄色分离株被认为是中间猪笼草的生态型,似乎代表了一个独立的谱系,与较大的猪笼草/ N。不同。中级进化枝。

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