雄蚕新品种秋华×平30的育成

The Breeding of Male Silkworm Combination Qiuhua×Ping 30

目的育成经济性状优良的新家蚕性连锁平衡致死系平30,用该品种与皮斑限性杂交原种秋华组配成雄蚕杂交组合秋华×平30。方法利用从俄罗斯引进的家蚕性连锁平衡致死系原种S-14为性连锁平衡致死基因的供体亲本,以中国优秀常规蚕品种白云为受体亲本,采用笔者自行设计的家蚕性连锁平衡致死基因导入方法,把S-14的有关性别控制基因导入到白云体内。结果经省级鉴定该杂交种雄蚕率达99.8%,生命力强健,茧丝质优良,鲜茧出丝率较对照种提高26.11%,综合经济效益较常规蚕品种提高26.63%。结论该品种已通过浙江省桑蚕新品种审定,是国内外第一个通过审定的雄蚕品种。实践表明雄蚕品种深受蚕和农丝厂欢迎,具有广阔的推广应用前景。

[ Objective] To construct the new male silkworm hybridized combination Qiuhua x Ping30 by crossing sex-limited marking variety Qiuhua and Ping30. [Method] Using the sex-linked balanced lethal line S-14 introduced from Russia as donor and excellent commercial variety Balyun as receptor, a new sex-linked balanced lethal line Ping30 with fine economical characters was bred out by the designed method of sex-control gene transferring. [ Result ] The identified results indicated that male silkworm rate of new variety attained 99.8% with good viability and fine quality cocoon filament, such as the raw silk percentage of fresh cocoon increased 26.11% and the comprehensive economical benefits increased 26.63% compared with the control variety. [ Conclusion] Qiuhua×Ping30 has been passed the identification of new silkworm variety in Zhejiang Province and became the first identified commercial male silkworm variety in the world. The extending results also showed that the new male silkworm variety had a warm reception in the farmers and silk factories, hinted a favorable application future.