Kurtzman C P
National Center for Agricultural Utilization Research, U.S. Department of Agriculture, Peoria, Illinois 61604.
Antonie Van Leeuwenhoek. 1991 Jul;60(1):13-9. doi: 10.1007/BF00580436.
Saturn-spored species assigned to the genera Williopsis and Pichia were compared from extent of nuclear DNA complementarity. Of the Pichia spp., four were recognized as distinct taxa: P. dispora, P. saitoi, P. zaruensis and Pichia sp. nov. Among Williopsis spp., the following were accepted: W. californica, W. mucosa comb. nov., W. pratensis, W. saturnus var. saturnus, W. saturnus var. mrakii comb. nov., W. saturnus var. sargentensis comb. nov., W. saturnus var. subsufficiens comb. nov. and Williopsis sp. nov. The new Pichia and Williopsis species are described elsewhere. Moderate (36-68%) DNA relatedness was detected between the former Pichia sargentensis and varieties of W. saturnus again demonstrating that nitrate assimilation is not a reliable criterion for separating yeast species.
从核DNA互补程度对归入威尔酵母属（Williopsis）和毕赤酵母属（Pichia）的土星孢子菌种进行了比较。在毕赤酵母属物种中，有四个被确认为不同的分类单元：分散毕赤酵母（P. dispora）、斋藤毕赤酵母（P. saitoi）、扎鲁毕赤酵母（P. zaruensis）和毕赤酵母新种（Pichia sp. nov.）。在威尔酵母属物种中，以下物种被认可：加利福尼亚威尔酵母（W. californica）、黏膜威尔酵母（W. mucosa comb. nov.）、草地威尔酵母（W. pratensis）、土星威尔酵母土星变种（W. saturnus var. saturnus）、土星威尔酵母马尔基变种（W. saturnus var. mrakii comb. nov.）、土星威尔酵母萨金特变种（W. saturnus var. sargentensis comb. nov.）、土星威尔酵母亚充足变种（W. saturnus var. subsufficiens comb. nov.）和威尔酵母新种（Williopsis sp. nov.）。新的毕赤酵母和威尔酵母物种在其他地方有描述。以前的萨金特毕赤酵母与土星威尔酵母的变种之间检测到中等程度（36 - 68%）的DNA相关性，这再次表明硝酸盐同化不是区分酵母物种的可靠标准。
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