Then the strain (M3-20) with rich riboflavin was obtained. Compared with the parent strain, the riboflavin content of the mutant strain was increased by 215%.

对所得的菌株进一步进行抗铵突变株的选育，最终得到富含核黄素的营养酵母突变株（M3-20），其核黄素含量与出发菌株相比提高了约215%。

Comparing with parent strain S . cereviae, fusant SPSC is of fast flocculating.

cereviae具有强的自身絮凝能力.

The transglucosidase from the mutant strain 32 produce two times as much isomalto oligosaccharides as that from their parent strain 3.

筛选和诱变选育了肉桂色曲霉高产转移葡萄糖苷酶突变株32号，其转化底物生成异麦芽寡糖的产量比原株3。

The precocious line was much less pathogenic than the parent strain judged by mortality and weight gains, but its immunogenicity was reduced to some degree.

根据死亡和增重判断早熟株的致病性较亲本株大大降低，但其免疫原性也有一定程度的下降。