Breeding of Silkworm Variety "Chuancan No.24" with Strong Vitality for Summer-Autumn Rearing

[ Objective] The aim was to introduce the breeding process of natural colorful cocoon silkworm variety, Chuancan No. 24. [ Method] By cross breeding and pedigree separation, the silkworm variety, Chuancan No. 24, with double sex-limited markings and strong vitality and for sum- mer-Autumn rearing was bred. [ Result] The results of laboratory identification and countryside test in Sichuan Province indicated that the Chuancan No. 24 was strong and could be reared easily. They had uniform development and excellent quality of cocoon and silk. In addition, their sexes could be identified by larval body color and markings. The main indexes are as follows： cocoon yield per 10 003 fourth instar larvae, 19.66 kg; filament length, 1 241.29 m; length of non-broken filament, 941.99 mm; reelability, 75.87% ; raw silk ratio of fresh cocoon, 17.07% ; and neatness, 94.03 points. The main economic features of new variety were better than those of the control. [ Conclusion] The Chuancan No. 24 has been approved by the Sichuan Silkworm Evaluation Commission, and it is suitable to rear this new variety in some regions of the Yangtze River drainage basin, such as Sichuan Province and Chongqing.

春秋兼用家蚕品种川蚕23号的选育

采用杂交选育和定向选择的育种方法,育成了优质、高效、好养的春秋兼用家蚕新品种川蚕23号。经四川省家蚕品种实验室鉴定和农村生产试养表明,新品种具有体质强健、耐高温多湿、龄期经过短、饲料效率高、茧丝品质优良、产量稳定的特点,已通过四川省家蚕品种审定委员会审定。新品种春季在农村试养鉴定的100 kg桑收茧量9.11 kg,比对照品种871×872提高8.58%;在实验室鉴定的成绩与对照品种菁松×皓月相当,虫蛹率96.20%,解舒率79.86%,鲜茧出丝率17.72%,洁净97.91分。新品种秋季在农村试养鉴定的100 kg桑收茧量7.54 kg,比对照品种洞.庭×碧.波提高3.98%;在实验室鉴定的虫蛹率93.05%,万蚕产茧量18.77 kg,分别比对照品种洞.庭×碧.波提高1.74个百分点、2.46%,一粒茧丝长1 150 m,解舒丝长932 m,解舒率81.04%,洁净94.82分,鲜茧出丝率16.90%,分别比对照品种洞.庭×碧.波提高41 m、83 m、4.50个百分点、3.06分、0.38个百分点。新品种在饲养条件和气候环境较差的蚕区饲养,能显示出良好的生产性能。

强健性夏秋用新蚕品种川蚕24号育成

[目的]介绍强健性夏秋用蚕品种川蚕24号的选育经过和品种特性。[方法]采用杂交育种和系统选择的方法,育成强健性夏秋用皮斑双限性蚕品种川蚕24号。[结果]经四川省家蚕品种审定的室内鉴定和农村鉴定,新品种具有强健好养、发育整齐、茧丝质优、可根据幼虫体色和斑纹区分雌雄的特点,万蚕产茧量19.66 kg,茧丝长1 241.29 m,解舒丝长941.99 m,解舒率75.87%,鲜茧出丝率17.07%,洁净94.03分,主要经济指标超过对照种。[结论]新品种川蚕24号强健好养,高产优质,适合四川、重庆等长江流域蚕区夏秋季饲养。

家蚕强健多丝量品种川蚕30号的选育及其经济性状稳定性

为选育出适宜四川及长江中下游蚕区春季饲养的优质家蚕品种,采用杂交与定向选育等育种方法,结合选育的早期、中期、后期世代对个体、蛾区、系统3个水平进行家蚕生命力、茧丝质性状的选择,育成主要经济性状互补的家蚕新材料君、兰、星、月,并利用不完全双列杂交配合力测试,筛选出家蚕强健多丝量杂交组合品种君·兰×星·月(川蚕30号)。经鉴定,该杂交组合健康好养,产量高,茧层厚,丝量多,茧丝质性状优良,综合经济性状超过对照品种。川蚕30号经同地域不同年份、同年份不同地域饲养,其主要经济性状稳定、高产稳产、健康好养、质量优,于2020年通过四川省家蚕品种审定委员会审定,适宜在四川蚕区及长江中下游蚕区春季饲养。