真菌共祖起源的分子证据

Molecular evidence for common descent of true fungi

以真菌界、动物界和植物界中的19种各类生物作为代表,从具有进化速率不同区段结构的核糖体核酸基因大亚基全序列的C3、C9及C11三个高度保守区段中鉴定出了4条真菌所共有的核苷酸序列,亦即真菌界所特有的核苷酸序列。从其保守区段C5中鉴定出了1条子囊菌门所特有的保守序列;从保守区段C7中鉴定出了1条担子菌门所特有的保守序列。研究结果为各类真菌起源于一个共同祖先提供了分子证据。用于研究的美味石耳的核糖体核酸基因大亚基全序列是由本实验室所提供;其他18种核糖体核酸基因大亚基全序列来自GenBank。

Four characteristic sequences of true fungi were found in the conserved regions C3、 C9, and C11 of LSU rDNA. One characteristic sequence of Ascomycota and another one of Basidiomycota were identified respectively in the conserved region C5 and C7. The results showed that these are the molecular evidence for common descent of the true fungi. The whole sequence of LSU rDNA from Umbilicaria esculenta was made byWei＇s lab., and the other whole sequences of LSU rDNA from 18 species were obtained from GenBank.