定向筛选 meaning in English

directed selection

In this paper , endophytic fungus of ginkgo biloba l . ( eg ) were studied , from which the ginkgolide - producing strains were screened orientationally , by means of studying endo - cellular metabolites from trial - strains
本文以银杏树内生真菌( endophyticfungusofginkgobilobal . , eg )为研究对象，通过对内生真菌胞内产物的研究，定向筛选银杏内酯产生菌。