强健性夏秋用新蚕品种川蚕24号育成

Breeding of A Silkworm Variety,"Chuancan No.24",with Characters of Excellent Healthiness for Summer and Autumn Rearing

[目的]介绍强健性夏秋用蚕品种川蚕24号的选育经过和品种特性。[方法]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蚕品种川蚕24号。[结果]经四川省家蚕品种审定的室内鉴定和农村鉴定,新品种具有强健好养、发育整齐、茧丝质优、可根据幼虫体色和斑纹区分雌雄的特点,万蚕产茧量19.66 kg,茧丝长1 241.29 m,解舒丝长941.99 m,解舒率75.87%,鲜茧出丝率17.07%,洁净94.03分,主要经济指标超过对照种。[结论]新品种川蚕24号强健好养,高产优质,适合四川、重庆等长江流域蚕区夏秋季饲养。

[Objective] The aim was to introduce the breeding process of natural colorful cocoon silkworm variety,Chuancan No.24.[Method] By cross breeding and pedigree separation,the silkworm variety,Chuancan No.24,with double sex-limited markings and characters of excellent healthiness and for summer and autumn rearing was bred.[Result] The results of laboratory identification and countryside test in Sichuan Province indicated that the Chuancan No.24 was strong and could be reared easily.They had uniform development and excellent quality of cocoon and silk.In addition,their sexes could be identified by larval body color and markings.The main indexes are as follows：cocoon yield per 10 000 4thinstars with larvae,19.66 kg;length of filament,1 241.29 m;non-broken filament,941.99 mm;reelability,75.87%;raw silk ratio of fresh cocoon,17.07%;and neatness,94.03 points.The main economic features of new variety were better than those of the control.[Conclusion]The Chuancan No.24 has been approved by the Sichuan Silkworm Evaluation Commission,and it is suitable to rear this new variety in some regions of the Yangtze River drainage basin,such as Sichuan Province and Chongqing.