Ji Xiao-Hong, He Shuang-Hui, Chen Jia-Jia, Si Jing, Wu Fang, Zhou Li-Wei, Vlasák Josef, Tian Xue-Mei, Dai Yu-Cheng
a Institute of Microbiology, PO Box 61, Beijing Forestry University , Beijing , China.
b Chinese Academy of Sciences Key Laboratory of Forest Ecology and Management , Institute of Applied Ecology , Shenyang , China.
Mycologia. 2017;109(1):27-34. doi: 10.1080/00275514.2016.1274619. Epub 2017 Jan 4.
Onnia includes white rotting polypores with annual basidiocarps, a duplex context, monomitic hyphal structure, hymenial setae, and hyaline, thin-walled, smooth basidiospores. Specimens of Onnia, originating mainly from East Asia, Europe, and North America, were studied using both morphology and phylogenetic analyses. Our concatenated data set was derived from 25 collections and included (i) 25 nuc rDNA internal transcribed spacer region sequences (ITS1-5.8S-ITS2 = ITS), 17 generated in this study; and (ii) 14 nuc rDNA 28S rDNA sequences, including the D1-D2 domains, 11 of them generated in this study. The resulting maximum likelihood and Bayesian phylogenies recovered all sampled collections of Onnia as a well-supported clade. In this clade, three previously accepted species, viz., Onnia leporina, O. tomentosa, and O. triquetra, received strong support, whereas three additional lineages with strong support represent the new species described in this paper, O. subtriquetra, O. microspora, and O. tibetica. Of the six Onnia species occurring on gymnosperms, O. tomentosa and O. leporina grow mainly on Picea and have circumboreal distribution in the Northern Hemisphere. In contrast, other species that mostly grow on Pinus are geographically restricted to limited regions, viz., O. triquetra in Europe, O. subtriquetra in North America, and O. microspora and O. tibetica in Asia.
奥尼阿属包括具有一年生担子果的白色腐朽多孔菌，有双层菌肉，单系菌丝结构，子实层刚毛，以及透明、薄壁、表面光滑的担孢子。主要来自东亚、欧洲和北美的奥尼阿属标本，通过形态学和系统发育分析进行了研究。我们的串联数据集来自25个样本，包括（i）25个核糖体DNA内转录间隔区序列（ITS1-5.8S-ITS2 = ITS），其中17个是本研究中生成的；以及（ii）14个核糖体DNA 28S rDNA序列，包括D1-D2结构域，其中11个是本研究中生成的。由此得到的最大似然和贝叶斯系统发育树将所有采样的奥尼阿属样本恢复为一个得到有力支持的分支。在这个分支中，三个先前被认可的物种，即奥尼阿·鳞皮多孔菌、绒毛奥尼阿和三棱奥尼阿，得到了有力支持，而另外三个得到有力支持的谱系代表了本文描述的新物种，即亚三棱奥尼阿、小孢奥尼阿和西藏奥尼阿。在寄生于裸子植物上的六个奥尼阿属物种中，绒毛奥尼阿和鳞皮多孔菌主要生长在云杉上，在北半球有环北极分布。相比之下，其他主要生长在松树上的物种在地理上局限于有限区域，即欧洲的三棱奥尼阿、北美的亚三棱奥尼阿，以及亚洲的小孢奥尼阿和西藏奥尼阿。
