【摘要】 本项目以生态型差异大的地方三眠土种、丝质优的四眠纯种为杂交亲本 ,利用亲本间优良基因的重组 ,育成具有双亲综合优点的改良三眠种 30 5;并对 30 5进行不完全双列杂交、丝质鉴定 ,新育成细纤度三眠蚕杂交组合 30 5× SJ1 ,该组合经两年三季鉴定 ,其纤度在 2 .0 0 38D～2 .1 980 D之间 ,且综合经济性状优 ,适合用作缫制高品位、细纤度生丝更多还原

【Abstract】 The itern with ecotype difference regional trimolter and cocoon filament economic character were used as parents in the study. Combining crossbreeding with pedigree selection and breeding to polymerize the excellent genes from parents, in a short period trimolter race with excellent synthetical character was bred and named 305, which was con sequently paired with excellent practical tetramoter SJ1 carry incomplete double arrange crossed, a new silkworm variety 305×SJ1 was prepared with the combination cocoon size 2.0038D-2.198D. All the above characteristics can meet the requirements for reeling high grade silk.更多还原