适合亚热带蚕区饲养的三眠蚕育种材料选择  

Selection of Trimolter Silkworm Breeding Material Suitable for Subtropical Sericultural Area

作　　者：吴阳春[1,2] 钱平[1,2] 

机构地区：[1]中国农业科学院蚕业研究所,农业部家蚕生物技术重点开放实验室,江苏镇江212018 [2]江苏科技大学,江苏镇江212003

出　　处：《蚕业科学》2008年第4期752-755,共4页ACTA SERICOLOGICA SINICA

基　　金：国家茧丝绸发展风险基金项目[编号国茧协力(2007)49];“十一五”国家科技支撑计划项目(编号2006BAD06-B03);农业部公益性行业科研专项(编号nyhyzx07-020)

摘　　要：为了培育适合亚热带蚕区生产高品位生丝的家蚕品种,根据家蚕眠性遗传机制,利用杂交育种及显性三眠纯合技术,将超细纤度三眠蚕品种与夏秋蚕品种杂交育成Z3等细纤度三眠蚕材料,再与多丝量春用蚕品种杂交,初步育成了Z3.C3等纤度为2.44 dtex、全龄经过短、体质强健、茧丝质优良的三眠蚕材料。采用选拔的三眠蚕材料初步组配的Z3×84Y2杂交组合的实验室饲养成绩为:全龄经过21 d,虫蛹率98.55%,全茧量1.75 g,茧层率22.47%,茧丝长1 354 m,解舒率88.15%,洁净95.3分,纤度2.6 dtex。The aim of this paper is to breed silkworm variety with high quality of raw silk suitable for the subtropical sericultural area. Based on the genetic mechanism of silkworm moltinism, the technology of cross breeding and dominant homozygous of trimolter silkworm was used. Firstly, the trimolter silkworm variety with superfine silk size was hybridized with silkworm variety for autumn and summer rearing, trimolter silkworm material with thin size silk （Z3 etc） were bred. Secondly, Z3was hybridized with hypersilkgeneous silkworm variety for spring rearing, and the trimolter silkworm materials of middle size silk （ Z3 · C3 etc） were bred primarily. These materials have characteristics of the silk size of 2.44 dtex, short duration of feeding period, healthy, and high quality of raw silk. Rearing result of the hybridized combination of Z3×84Y2 in the lab, which was se- lected for combination of the trimolter silkworm material, indicated that duration of all instars is 21 d, larva-pupa rate is 98.55%, cocoon weight is 1.75 g, cocoon shell rate is 22.47%, length of cocoon filament is 1 354 m, reelability is 88. 15%, neatness of raw silk is 95.3, and silk size is 2.6 dtex.

关 键 词：三眠蚕 育种材料 中等纤度 

分 类 号：S882.1[农业科学—特种经济动物饲养]