二、诱变前的准备(一)选择出发菌株出发菌株就是指用于育种的原始菌株,出发菌株的好坏可直接影响育种效率。食用菌的出发菌株目前尚无确切的标准,一般应选择经自然选育后证明其性状比较稳定的菌株,或是经杂交或诱变后的性状较稳定的菌株。有的菌株在发生某些变异后,对一些诱变物质会提高敏感性, Second, the preparation before mutagenesis (A) select the starting strain Starting strain refers to the original strain used for breeding, the starting strain can directly affect the breeding efficiency. At present, there is no definite standard for starting strains of edible fungi. In general, strains that have been proved to be stable by natural selection should be selected or strains that have been relatively stable after crossing or mutagenesis. Some strains in the event of some variation, some of the mutagenic substances will increase the sensitivity,