夏秋用皮斑双限性家蚕品种“夏月×秋玉”的育成

Breeding of A Silkworm Variety "Xiayue × Qiuyu"with Double Sexlimited Markings for Summer and Autumn Rearing

采用杂交育种和系统选择的方法,育成强健性夏秋用皮斑双限性家蚕品种夏月×秋玉。实验室和农村生产鉴定结果表明,新品种不仅具有强健好养、发育整齐、可根据幼虫体色和斑纹区分雌雄的特点,而且产茧量高,丝质优,主要经济指标超过对照品种。新品种的万蚕产茧量达19.66kg,一粒茧丝长1241.29m,解舒丝长941.99m,解舒率75.87%,鲜茧出丝率17.07%,洁净94.03分。新品种已通过四川省家蚕品种审定,适合在四川、重庆等长江流域蚕区饲养。

By using the method of cross breeding and pedigree selection, a silkworm variety named Xiayue ×Qiuyu which has double sex-limited markings and characters of excellent silk quality and suits for summer and autumn rearing was obtained. The results of laboratory identification and rearing by farmers indicated that the new variety not only had the advantages of strong vitality, easy handling, uniform development, and easy judgment of sex by larval body color and marking, but also had high cocoon yield and excellent silk quality. The main economic features of the new variety were better than the control variety. Cocoon weight per 10 000 larvae of the new variety was 19. 66 kg, single cocoon filament length 1 241.29 m, length of none-broken cocoon filament 941.99 m, reelability 75.87%, raw silk rate of fresh cocoon 17. 07%, and the neatness 94. 03 points, respectively. This new variety had passed the evaluation organized by Sichuan Silkworm Variety Evaluation Committee and is suitable for rearing in areas of Sichuan, Chongqin and other Yangtze River valleys.