大蚕期高温处理对“永中3号”品种性状的影响

Effect of High Temperature Treatment during Big Silkworm Stage on Variety Traits of Yongzhong No.3

永中3号为河南省蚕业科学研究院新近选育的家蚕四元杂交组合。永中3号4—5龄高温饲育与常温饲育相比较,龄期经过缩短36h,蚕茧产量和质量下降。高温饲育条件下,永中3号龄期经过时间、虫蛹统一生命率与两广二号相仿,万蚕收茧量略高于两广二号,万蚕茧层量略低于两广二号。

Yongzhong No.3 is a new four-way cross combination silkworm variety selected by Henan Sericulture Institute.Comparing the rearing of 4th to 5th instar Yongzhong No.3 at high temperature and at normal temperature,the instar duration shortened 36h,the cocoon yield and quality all declined.Under the high temperature,Yongzhong No.3 had similar instar duration,larval-pupal integrated survival rate with Liangguang No.2,and its cocoon crop per 10 000 silkworms was a little higher than that of Liangguang No.2,but the cocoon shell weight was a bit lower than that of Lianguang No.2.