家蚕新品种“9801×9802”的选育

本试验选择性状优良的中系、日系材料若干,以杂交育种结合系谱选择为主,辅以对死笼率及产卵量的选择,经过6年11代的选育,初步选育出一对春秋兼用的桑蚕新品种。该品种虫蛹率、万蚕收茧量、万蚕茧层量、万头蚕产丝量、生丝率、解舒率分别高于对照种。茧层率与对照种相仿,茧丝长及净度低于对照种。克蚁制种量高出对照种16.5个百分点。该品种综合经济性状优良,适合在山西省及气候条件相同的中西部蚕区饲养。

The Breeding of Silkworm New Variety “9801 × 9802”

Some silkworms of Chinese fine breed and Japanese breed were chosen to do the hybrid and pedigree se-lection experiment ,in the meantime considering dead cocoon percent and egg yield .After 6 years of 11 genera-tion’s breeding ,a new pair of silkworm variety was selected .The breed is superior to the control on the following aspects as pupa rate ,cocoon production per ten thousand larvae ,number of mature eggs in oviducts ,silk weight per（10 000） larvae ,raw silk rate and reelability percentage .The cocoon shell rate is similar with the control ,and the silk length and silk purity are lower than the control .The cocoon yield per case of eggs is 16 .5% higher than the control .The breed has fine economic traits and is suitable to be reared in Shanxi province and central and western China where the climate is similar .