Agriculture and Agri-Food Canada, Central Experimental Farm, Ottawa, ON, Canada;
Persoonia. 2010 Dec;25:22-31. doi: 10.3767/003158510X524754. Epub 2010 Jul 30.
Three new species of Pythium, namely, P. oopapillum, P. emineosum and P. camurandrum are presented in this paper based on morphological descriptions and molecular phylogenetic characterisation. These new species were isolated from various ecological regions in Canada. They have unique morphological features in the genus Pythium, and form distinct clades in maximum parsimony analyses, which are also supported by maximum likelihood phylogeny using general time reversible model (GTR), and Bayesian inference (BI) phylogeny using Markov Chain Monte Carlo (MCMC) analysis methods. A comparative study of the new species with closely related taxa, their clade positions, and morphological features are described in this paper.
本文基于形态描述和分子系统发育特征，介绍了三种新的腐霉属真菌，即泡囊腐霉、深绿腐霉和卡蒙腐霉。这些新种是从加拿大不同的生态区域分离出来的。它们在腐霉属中具有独特的形态特征，在最大简约分析中形成明显的分支，这也得到了通用时间可逆模型（GTR）的最大似然系统发育和马尔可夫链蒙特卡罗（MCMC）分析方法的贝叶斯推断系统发育的支持。本文还对新种与亲缘关系密切的分类群进行了比较研究，描述了它们的分支位置和形态特征。
