云南蚕区部分家蚕品种资源对BmNPV抵抗性的初步调查  

A Preliminary Investigation on the Resistance of Silkworm Variety Resources to BmNPV in Yunnan Sericutural Area

作　　者：黄平[1] 廖鹏飞[1] 谢道燕[1] 董占鹏[1] 朱水芬[1] 董家红[2] 白兴荣[1] 

机构地区：[1]云南省农业科学院蚕桑蜜蜂研究所,云南蒙自661101 [2]云南省农业科学院生物技术与种质资源研究所,昆明650223

出　　处：《蚕业科学》2011年第2期308-311,共4页ACTA SERICOLOGICA SINICA

基　　金：云南省农业生物技术重点实验室开放基金项目(No.08YNA01);云南省现代农业蚕桑产业技术体系建设专项

摘　　要：家蚕核型多角体病毒(BmNPV)是云南蚕区对家蚕危害最严重的病毒病病原。为了筛选对BmNPV具有较强抵抗能力的家蚕品种资源作为抗病育种素材,以云南省保存的18个家蚕品种(品系)为材料,于3龄起蚕经口接种BmNPV,调查不同品种(品系)对BmNPV的抵抗性。不同家蚕品种对BmNPV的抵抗能力存在显著差异,供试品种中云8B的抵抗能力最强,发病率仅为28.9%,而红云B的发病率却高达100%,品种间发病率最大相差71.1个百分点;发病率55%以下的品种多数为日系品种,但品种间发病率最高(红云B)和最低(云8B)的均为日系品种。一些对BmNPV抵抗能力较强的品种全茧量较高,但品种对BmNPV的抵抗能力与全茧量没有严格的相关关系。Bombyx mori nucleopolyhedrovirus（BmNPV） is a pathogen of virus disease that brings the most serious damage to silkworm（Bombyx mori） in Yunnan sericutural area.In order to obtain silkworm variety resources with strong resistance to BmNPV as breeding material for disease resistance,the newly exuviated larvae of the 3rd instar of 18 silkworm varieties preserved in Yunnan Province were inoculated with BmNPV per os for the investigation of resistance of various silkworm varieties（strains） to BmNPV.The results indicated that there were significant differences between silkworm varieties in their resistance to BmNPV.Among the tested varieties,Yun 8B had the strongest resistance with morbidity as low as 28.9%,while the morbidity of Hongyun B reached 100%,being 71.1 percentage higher than that of Yun 8B.All varieties with morbidity less than 55% were of Japanese strain.However,varieties with the highest（Hongyun B） and lowest（Yun 8B） morbidity were both of Japanese strain.A number of varieties with high resistance to BmNPV had high cocoon weight.Yet,no close correlation was observed between the resistance to BmNPV and cocoon weight.

关 键 词：家蚕核型多角体病毒 抵抗性 家蚕品种资源 云南省 

分 类 号：S882[农业科学—特种经济动物饲养]