家蚕中秋用品种川蚕11号的育成

采用杂交育种方法，育成了强健优质中秋用蚕品种川蚕11号（L8081·L8191×L4朝92·L4白82），系双限性（雌斑限性）四元杂交种。鉴定结果表明该品种较易繁殖，健康性接近对照种，产茧量、产丝量及丝质成绩都高于对照，万蚕茧层量高于对照5.53％，鲜毛茧出丝率19．37％，茧丝长1240m，解舒丝长965m，净度98分，适应四川省及西南地区中秋用种。

THE BREEDING OF A NEW MIDAUTUMN SILKWORM VARIETY CHUAN 11

For the purpose of improving health and silk quality of autumn silkworm varieties,by using the method of hybridization,we have bred a new silkworm variety Chuan 11(L8081 · L8191× L4Zhao92· L4Bai82)which is robust and has good quality. It is a fourelement hybridized combination and showes double hologynic inheritance (hologynic in-heritance of female-skin-spot). Identification results showed that the new race multipliedeasily,its health was similar to the control race ;its cocoon yield, silk yield and silk qual-ity were better than that of the control;its cocoon shell yield from 10000 larvae of 4thage was 5. 53% higher than that of the control;its raw silk ratio of fresh cocoon reached19. 37% isingle cocoon filament length was 1240 metres, nonbroken filament length 965metres,neatness 98 marks. As a midautumn silkworm variety,it's favorable for SichuanProvince as well as the whole sowthestern China.