Garbelotto Matteo, Gonthier Paolo, Linzer Rachel, Nicolotti Giovanni, Otrosina William
Department of Environmental Science, Policy and Management-Ecosystem Science Division, University of California, Berkeley, CA 94720, USA.
Fungal Genet Biol. 2004 Nov;41(11):1046-51. doi: 10.1016/j.fgb.2004.08.003.
A natural first generation hybrid fungus shows interspecific heterozygosity. The nuclear condition of a rare natural hybrid between two taxa of the Heterobasidion complex is investigated. Heterobasidion species are known to be either homokaryotic (haploid) or heterokaryotic (n+n), but heterokaryons are made up of both homokaryotic and heterokaryotic sectors. The natural hybrid appears to be either a heterokaryon undergoing a primary homothallic phase or a diploid with limited ability to exchange nuclei when mated with homokaryons. The natural hybrid is stable and long lived, suggesting hybridization may play an important role in the evolutionary history of this fungal complex.
一种天然的第一代杂交真菌表现出种间杂合性。对异担子菌复合体两个分类单元之间罕见的天然杂交种的核状况进行了研究。已知异担子菌物种要么是单核体（单倍体），要么是异核体（n+n），但异核体由单核体和异核体区域组成。这种天然杂交种似乎要么是处于初级同宗配合阶段的异核体，要么是与单核体交配时核交换能力有限的二倍体。这种天然杂交种稳定且寿命长，表明杂交可能在这种真菌复合体的进化历史中起重要作用。
