To mutate breeding with Penicillium chrysogenum in existing production in order to obtain stable high yield strain.
对现有生产中的产黄青霉进行育种突变，以获得稳定的高产菌株。
2
This way local breeding stocks are preserved, meaning that fish catches should remain abundant and stable.
这样便可保护当地的繁殖种群，也就是说可维持充沛和稳定的捕获量。
3
The haploid breeding of maize is a technology that using anther culture or gynogenesis to produce haploid, and then obtain stable new varieties through natural or artificial doubling.