4个日系蚕品种的耐湿性改良  

Humidity tolerance improvement of four silkworm varieties of Japanese strain

作　　者：肖阳[1] 吴福泉[1] 李庆荣[1] 杨琼[1] 罗国庆[1] 叶明强[1] 邢东旭[1] 

机构地区：[1]广东省农科院蚕业与农产品加工研究所,广东广州510610

出　　处：《广东农业科学》2013年第23期118-121,共4页Guangdong Agricultural Sciences

基　　金：广东省农业攻关项目(2012B020304003);国家国际科技合作专项(KY-2012-10-05);广东省国际合作项目(2011B050700002)

摘　　要：为筛选培育适宜华南蚕区饲养的耐湿性蚕品种,通过历时4年的人工高湿逆境定向培育,对保存的4个日系品种研7、湘A、航7和丹的耐湿性进行改良。结果表明,经过8代的连续添湿,4个品种的虫蛹统一生命率均有所提高,将获得的4个累代添湿品系和对应的原母种同时置于高湿环境中饲育,4个品种的累代添湿品系的虫蛹率较原母种均有不同程度提高,其中研7的虫蛹率由38.60%提高到72.13%,提高幅度最大。将累代添湿品系组配成改良粤蚕6号一代杂交种,与原一代杂交种同时在高湿环境中饲育,改良粤蚕6号的生命力和经济性状均有极显著提高。表明累代添湿可以提高蚕品种对高湿环境的耐受性,定向培育耐湿家蚕育种新素材。To breed silkworm varieties with higher humidity tolerance, directional breeding under high humidity circumstances was carried out for 4 years in this experiment, and the humidity tolerance of four silkworm varieties of Japanese strain was improved. The results showed that through continuous high humidity motivation for eight generations, all the larva-pupa survival rate of the four varieties increased. We reared four high humidity motivated strains and original parent strains in condition of high humidity, and the results showed that all the larva-pupa survival rate of high humidity motivated strains were higher than that of original parent strains. The larva-pupa survival rate of ＂Yan 7＂ was improved greatly, from 38.60% to 72.13%. We used the high humidity motivated strains to obtain the improved first hybrid of ＂Yue can No.6＂, reared it and original first hybrid in condition of high humidity, the results showed that the survival rate and economic characters improved significantly. Accordingly, the experimental results demonstrate that high humidity motivation for several generations may improve the high humidity tolerance of silkworm varieties, and breed new silkworm materials with high humidity tolerance.

关 键 词：日系品种 家蚕 耐湿性 改良 

分 类 号：S882[农业科学—特种经济动物饲养]