Results showed that the 33 sporophores of t . terreum collected from larix principis - rupprechtii stand belonged to distinct genotypes based on the analysis of rapd markers . the genet size of this species was small and no larger than 0 . 5 m 对33个棕灰口蘑子实体的rapd分析表明:每一个子实体属于不同的基因型,该种群形成数量多的小基因型,即基因型不大于0 . 5m 。