目的 为获得对不良天气具有较强适应性、耐粗饲和稳产、高产的柞蚕品种，使内蒙古等“二化一放”地区的柞蚕生产能够稳定和持续发展。 方法 首先采用逆境胁迫和系统选育的方法对参与试验的10余个柞蚕品种进行选育，再以抗低温、阴雨等能力和优良农艺性状为指标进行杂交优势测定，并以测定结果为基础择优选择4个品种组配成柞蚕四元杂交新品种“蒙蚕114”[（扎一·碧玉183）×（黄安东·青六）]。 结果 小区试验和农村生产鉴定结果表明，新品种易繁好养，综合经济性状优于对照种“珍珠1号”，其千粒茧质量、茧层量、千克卵产茧量分别比对照种显著提高14.00%、14.28%和19.46%；茧丝长、解舒丝长分别比对照种显著增加158.05、171.89 m；解舒率比对照高8.22百分点，显著提高18.56%；鲜茧出丝率比对照高1.02百分点，显著提高15.36%。 结论 “蒙蚕114”强健好养，产茧量高，营茧集中，茧型大，丝质优，能适应低温、多湿等环境，耐粗饲，适宜于内蒙古等二化一放地区放养。

Objectives A new Chinese oak silkworm variety with strong adaptability to adverse weather, tolerance to rough feed, stable and high yield was bred to ensure the stable and sustainable development of oak silkworm production in bivoltine areas including Inner Mongolia and other regions where one generation is bred a year. Methods Firstly, more than 10 varieties of oak silkworms participating in the experiment were screened with methods of stress and systematic breeding. Then, the heterosis was determined based on the elite agronomy traits and the ability to resist low temperatures and rainy weather. 4 varieties were selected and combined based on the determined results to breed a new quad- hybrid variety of oak silkworm called "Mengcan 114" ((Zhayi×Biyu183) × (Huang'an Dong× Qingliu)). Results The results of plot experiment and identification with rural production showed that the new variety was easy to reproduce and farm, and its elite agronomy traits were superior to that of the control variety 'Zhenzhu 1'. The cocoon mass of thousand grains, cocoon layer amount and cocoon production per kilogram egg was significantly increased by 14.00%, 14.28% and 19.46%, respectively, compared to the control variety. The length of ocoon filament and relaxation filament was significantly increased by 158.05 m and 171.89 m, respectively, compared to the control variety. The rate of relaxation and the silk extraction rate of fresh cocoons was 8.22% and 1.02% higher than that of the control variety, significantly increased by 18.56% and 15.36%. Conclusions "Mengcan 114" is robust and easy to farm, with high cocoon yield, concentrated cocoons, large cocoon shape, elite silk quality, and able to adapt to low temperature, high humidity and other stress. It is resistant to rough feeding, suitable for free range farming in bivoltine areas including Inner Mongolia and other regions where one generation is bred a year.