据荷兰刊物报道:“由于菌种生产者对菌株缺乏认真的保藏,一些最为广泛应用的菌株,在好几个国家出现了退化迹象”。此外,也有资料介绍“在美国和德国,由于菌种生产者不使用原种,菌株亦已出现退化,荷兰也有类似情况”。以上论述引出了以下蘑菇菌株保藏与退化的基本想法。 According to a Dutch publication: “Some of the most widely used strains have shown signs of degradation in several countries due to lack of serious strain preservation by strain producers.” In addition, there is also information on “In the United States and Germany, strains have also been degenerated due to the fact that the strain producers do not use the original breeds, and the Netherlands has a similar situation.” The above discussion leads to the following basic idea of ​​mushroom strain preservation and degradation.