Menkis A, Bastiaans E, Jacobson D J, Johannesson H
Department of Forest Mycology and Pathology, Swedish University of Agricultural Sciences, Uppsala, Sweden.
J Evol Biol. 2009 Sep;22(9):1923-36. doi: 10.1111/j.1420-9101.2009.01801.x. Epub 2009 Aug 3.
The objective of this study was to explore the evolutionary history of the morphologically recognized filamentous ascomycete Neurospora tetrasperma, and to reveal the genetic and reproductive relationships among its individuals and populations. We applied both phylogenetic and biological species recognition to a collection of strains representing the geographic and genetic diversity of N. tetrasperma. First, we were able to confirm a monophyletic origin of N. tetrasperma. Furthermore, we found nine phylogenetic species within the morphospecies. When using the traditional broad biological species recognition all investigated strains of N. tetrasperma constituted a single biological species. In contrast, when using a quantitative measurement of the reproductive success, incorporating characters such as viability and fertility of offspring, we found a high congruence between the phylogenetic and biological species recognition. Taken together, phylogenetically and biologically defined groups of individuals exist in N. tetrasperma, and these should be taken into account in future studies of its life history traits.
本研究的目的是探索形态学上公认的丝状子囊菌四孢脉孢菌的进化历史，并揭示其个体和种群之间的遗传及生殖关系。我们将系统发育和生物学物种识别方法应用于一组代表四孢脉孢菌地理和遗传多样性的菌株。首先，我们能够确认四孢脉孢菌的单系起源。此外，我们在形态物种内发现了9个系统发育物种。当使用传统的宽泛生物学物种识别方法时，所有被研究的四孢脉孢菌菌株构成一个单一的生物学物种。相比之下，当使用繁殖成功率的定量测量方法，纳入后代的活力和育性等特征时，我们发现系统发育和生物学物种识别之间具有高度一致性。综上所述，四孢脉孢菌中存在系统发育和生物学定义的个体组，在未来对其生活史特征的研究中应考虑这些因素。
