Britz H, Coutinho TA, Wingfield MJ, Marasas WF, Gordon TR, Leslie JF
Forestry and Agricultural Biotechnology Institute, Faculty of Biological and Agricultural Sciences, University of Pretoria, Pretoria, 0002, South Africa.
Appl Environ Microbiol. 1999 Mar;65(3):1198-201. doi: 10.1128/AEM.65.3.1198-1201.1999.
Fusarium strains in the Gibberella fujikuroi species complex cause diseases on a variety of economically important plants. One of these diseases, pitch canker of Pinus spp., is caused by strains identified as Fusarium subglutinans f. sp. pini. Fertile crosses were detected between F. subglutinans f. sp. pini strains from South Africa, California, and Florida. F. subglutinans f. sp. pini strains were not cross-fertile with the standard tester strains of six of the seven other mating populations of G. fujikuroi. Sporadic perithecia with ascospores were obtained in two crosses with the mating population B tester strains. These perithecia were homothallic, and the ascospores derived from these perithecia were vegetatively compatible with the mating population B tester strain parent. We concluded that fertile F. subglutinans f. sp. pini isolates represent a new mating population (mating population H) of G. fujikuroi and that they belong to a unique biological species in a distinct taxon.
藤仓赤霉菌复合种中的镰刀菌菌株会在多种具有重要经济价值的植物上引发病害。其中一种病害，即松属植物的树脂溃疡病，是由被鉴定为拟胶孢镰刀菌松专化型的菌株引起的。在来自南非、加利福尼亚和佛罗里达的拟胶孢镰刀菌松专化型菌株之间检测到了可育杂交。拟胶孢镰刀菌松专化型菌株与藤仓赤霉菌其他七个交配群体中的六个标准测试菌株不能杂交育性。在与交配群体B测试菌株的两次杂交中获得了带有子囊孢子的散生子囊壳。这些子囊壳是同宗配合的，并且从这些子囊壳衍生的子囊孢子在营养上与交配群体B测试菌株亲本相容。我们得出结论，可育的拟胶孢镰刀菌松专化型分离物代表了藤仓赤霉菌的一个新交配群体（交配群体H），并且它们属于一个独特分类单元中的独特生物种。
