桑蚕雌蛾冷藏对其F1代蚕综合性状的影响研究OA

To investigate the impact of cold storage on comprehensive traits of F1 generation silkworms derived from female silkworms of the'827×Xinhang'hybrid strain,comparative trials on cocoon induction and rearing were conducted using first-generation hybrids produced after cold storage at 7.5℃and 10℃.The results demonstrated that prolonged cold storage at 7.5℃had no negative effects on larval viability or economic cocoon traits in F1 generation silkworms.However,under 10℃storage conditions,significant differ-ences were observed across different cold storage periods regarding the number of 4th-5th instar larvae,cocoon formation rate of 4th instar silkworms,healthy pupal retention rate,and cocoon layer quantity.In conclusion,cold storage of midline silkworm females with-in the 7.5℃to 10℃temperature range was feasible for seed production,with the resulting first-generation hybrids proving fully practical for agricultural applications.The optimal temperature standard for midline silkworm females during cold storage was 7.5℃.When using 10℃storage,the protection duration should not exceed 48 hours,with 24 hours being the most effective duration.