在真菌嗜热栖热孢霉自然种群中杀死孢子的减数分裂驱动因子。
Spore-killing meiotic drive factors in a natural population of the fungus Podospora anserina.
作者信息
van der Gaag M, Debets A J, Oosterhof J, Slakhorst M, Thijssen J A, Hoekstra R F
机构信息
Laboratory of Genetics, Wageningen University, 6703 HA Wageningen, The Netherlands.
出版信息
Genetics. 2000 Oct;156(2):593-605. doi: 10.1093/genetics/156.2.593.
In fungi, meiotic drive is observed as spore killing. In the secondarily homothallic ascomycete Podospora anserina it is characterized by the abortion of two of the four spores in the ascus. We have identified seven different types of meiotic drive elements (Spore killers). Among 99 isolates from nature, six of these meiotic drive elements occurred in a local population. Spore killers comprise 23% of the natural population of P. anserina in Wageningen, The Netherlands, sampled from 1991 to 1997. One Spore-killer type was also found in a French strain dating from 1937. All other isolates found so far are sensitive to spore killing. All seven Spore killer types differ in the percentage of asci that show killing and in their mutual interactions. Interactions among Spore killer types showed either mutual resistance or dominant epistasis. Most killer elements could be assigned to linkage group III but are not tightly linked to the centromere.
在真菌中，减数分裂驱动表现为孢子杀伤。在次生同宗配合的子囊菌嗜热栖热放线菌中，其特征是子囊中的四个孢子中有两个败育。我们已经鉴定出七种不同类型的减数分裂驱动元件（孢子杀手）。在从自然界分离的99个菌株中，这些减数分裂驱动元件中的六种出现在一个局部种群中。孢子杀手占1991年至1997年在荷兰瓦赫宁根采集的嗜热栖热放线菌自然种群的23%。在一株1937年的法国菌株中也发现了一种孢子杀手类型。到目前为止发现的所有其他菌株对孢子杀伤敏感。所有七种孢子杀手类型在表现出杀伤作用的子囊百分比及其相互作用方面都有所不同。孢子杀手类型之间的相互作用表现为相互抗性或显性上位性。大多数杀手元件可以归为连锁群III，但与着丝粒没有紧密连锁。
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