The stability of the high-yielding mutant was tested, the result showed that after passing 3 generations, the strain began to retrogress and the total titer had a substantial decline.
同时通过对高产菌株进行传代培养检验其传代稳定性，结果表明，传代3代后，菌株开始退化，并且其发酵效价有比较显著的下降。
The stability of the high-yielding mutant was tested, the result showed that after passing 3 generations, the strain began to retrogress and the total titer had a substantial decline.
同时通过对高产菌株进行传代培养检验其传代稳定性，结果表明，传代3代后，菌株开始退化，并且其发酵效价有比较显著的下降。
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