家蚕^(60)Co-γ射线诱发油蚕的遗传学研究  

STUDY OF GENETICS OF^( 60)Co-γ-RAY-INDUCED TRANSLUCENT SILKWORM (BOMBYX MORI L.)

作　　者：代方银[1] 鲁成[1] 王霞[1] 夏庆友[1] 向仲怀[1] 

机构地区：[1]西南农业大学蚕桑丝绸学院,农业部蚕桑学重点实验室,重庆400716

出　　处：《西南农业大学学报（自然科学版）》2002年第2期173-175,共3页Journal of Southwest Agricultural University

基　　金：国家自然科学基金项目 (39970 570 )资助

摘　　要：用60 Co -γ射线照射家蚕羽化前 2～ 3日雌蛹 ,羽化后与未经照射的雄蛾交配制种 ,于F3 群体中发现了一种双亲没有的新性状个体———高度油蚕。其幼虫皮肤透明度高 ,但没有其他高度油蚕的致死性 ,经多代饲养 ,体质强健 ,生殖力也正常。对其进行遗传分析和连锁检索 ,结果 :该油蚕为常染色体上的隐性基因突变 ;与红色卵 (re)连锁 ,属于第 5连锁群 ;其油蚕性比中国油 (oc)高 ,与oc杂交后代均为油蚕 ,确定其基因座位是 :5 - 4 0 .8。基因符号命名为 :occo。Female pupae were irradiated with 60 Co-γ-ray 2～3 days prior to eclosion. Then, after emergence, they were copulated with unirradiated males. In the F 3 population an individual with a new character that neither parent had was discovered - translucent. The larva had a high degree of translucence, but was less lethal than other kinds of translucent silkworms. After a few generations of rearing, the offsprings remained healthy and vigorous and retained high fecundity. Hereditary and linkage analysis showed that this character resulted from a recessive inheritable mutation on an autosome. The mutation was found to be linked with the red-egg gene ( re) and belong to the 5 th linkage group. It appeared more translucent than oc . The cross progenies with oc were all translucent, indicating that its gene locus should be at 5-40.8. It is assigned the gene symbol oc co .

关 键 词：家蚕 油蚕 遗传分析 辐射诱变 

分 类 号：S882.2[农业科学—特种经济动物饲养]