多丝量雄蚕新品种华菁×平72的育成  

Breeding of New Male Silkworm Variety Huajing × Ping 72 with High Silk Yield

作　　者：祝新荣[1] 何克荣[1] 柳新菊[1] 王永强[1] 陈诗[1] 孟智启[1] 

机构地区：[1]浙江省农业科学院蚕桑研究所,杭州310021

出　　处：《蚕业科学》2014年第2期248-253,共6页ACTA SERICOLOGICA SINICA

基　　金：浙江省农业新品种选育重大科技专项(No.2012C12910)

摘　　要：以多丝量为主要选育目标,提高雄蚕品种的茧丝生产性能。以家蚕性连锁平衡致死系平8为受体,普通家蚕品种872为优良性状基因供体,采用回交改良家蚕性连锁平衡致死系的方法,育成了经济性状优良的新平衡致死系平72。将该平衡致死系与多丝量限性斑纹品种华菁组配成雄蚕杂交组合华菁×平72,一代杂交种的雄蚕率达100%。经浙江省家蚕新品种实验室鉴定,华菁×平72的万蚕产茧层量5.016 kg,洁净96.36分,鲜茧出丝率19.00%,分别比多丝量家蚕品种菁松×皓月高0.308 kg、1.70分、1.56个百分点,是一对综合经济性状优良的多丝量雄蚕新品种。In this study, the high-silk-yield trait was taken as the main breeding objective to improve silk productivity of male silkworm varieties. By using the sex-linked balanced lethal silkworm strain Ping 8 as the acceptor parent and com- mon silkworm variety 872 as gene donor for excellent traits, a new sex-linked balanced lethal strain Ping 72 with excellent economic characters was bred by backcross improvement of sex-linked balanced lethal silkworm strain. It was further hy- bridized with Huajing, a sex-limited marking silkworm variety with high silk yield, to prepare the male silkworm hybrid combination HuajingxPing 72. The new male silkworm hybrid combination had a male silkworm rate of 100%. The results of laboratory trial rearing in Zhejiang Province indicated that its cocoon shell weight per 10 000 larvae was 5. 016 kg, neatness was 96.36 points, and raw silk rate was 19.00%, being 0. 308 kg, 1.70 points and 1.56 percentage points higher than that of the high-silk-yield silkworm hybrid combination Jingsong× Haoyue, respectively. Taken together, HuajingxPing 72 is a new high-silk-yield male silkworm variety with excellent comprehensive economic characters.

关 键 词：雄蚕品种 华菁×平72 性连锁平衡致死系 多丝量 回交改良 

分 类 号：S882.2[农业科学—特种经济动物饲养]