Species separation in Curvularia “geniculata” group inferred from Brn1 gene sequences
Species separation in Curvularia “geniculata” group inferred from Brn1 gene sequences
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DOI：
10.1007/s10267-003-0104-5
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发表时间：
2003-06
期刊：
影响因子：
1.4
通讯作者：
Guangyu Sun;Shinichi Oide;E. Tanaka;K. Shimizu;C. Tanaka;M. Tsuda
中科院分区：
文献类型：
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作者：
Guangyu Sun;Shinichi Oide;E. Tanaka;K. Shimizu;C. Tanaka;M. Tsuda
Brn1是一种参与黑色素生物合成途径的还原酶基因，它被用于弯孢菌属“膝部”成员之间的物种划分，并被证明是有用的。根据该区域的核苷酸序列构建了这些真菌成员的系统发育树。弯孢菌的所谓膝状群被分成几个类群。每个簇内成员的分生孢子形态非常相似，但在不同的簇间明显不同。系统发育类群与形态类群基本一致。因此，近缘弯孢霉、紫花弯孢霉、紫花弯孢霉的同义处理。老年人C。在之前的一项研究中，膝状体得到了支持。分生孢子翘曲的菌株与C。C.膝状体ATCC 6671在这些簇附近形成了一个独立的簇。突起种分别位于系统发育树中。为了对这些菌株进行合理的分类处理，我们应该积累更多的信息，并保留我们对它们的物种鉴定。
Brn1, a reductase gene involved in the melanin biosynthetic pathway, was adopted for species delimitation among members in the “geniculata” group ofCurvulariaspecies and proved to be useful for this purpose. Phylogenetic trees of these fungal members were constructed from nucleotide sequences of this region. The so-called geniculata group ofCurvulariawas separated into several clusters. The conidial morphology of the members in each cluster is closely similar but clearly different among discrete clusters. The phylogenetic groups almost concurred with the morphological grouping. Thus, the synonymous treatment ofCurvularia affinis,C. fallax, andC. senegalensistoC. geniculatain a previous study was supported. The isolates with warping hilum conidia were clearly different fromC. geniculataand separated into two clusters.C. geniculataATCC 6671 made an independent cluster situated near these clusters. The protuberant hilum species were located separately in the phylogenetic trees. For sound taxonomic treatment of these isolates, we should accumulate more information and retain our species determination for them.