三眠蚕311N×909的F_1在不同季节的性状表现

Performance of F_1 Crossbreeding from Trimolting Silkworm 311N×909 in Various Seasons

为三眠蚕的品种选育和推广应用提供依据,对三眠蚕311N×909的F1在不同季节的性状表现进行了研究。结果表明:春季和夏季的全龄经过均为22.333d,而秋季的全龄经过最长,为23.083d,比春季和夏季多0.75d;春季三眠蚕的各项表现最佳。其中,三眠率94.83%,普茧率94.49%,同宫茧率1.39%,全茧量1.615g,茧层量17.92%,死笼茧率3.51%。

The performance of F1 crossbreeding from trimolting silkworm 311N×909 in various seasons was studied to provide references for breeding,generalization and application of trimolting silkworm.The results showed that the all-aged duration in spring and summer were all 22.333 d.In autumn it was the longest（23.083 d）,0.75 d longer than that in spring and summer;all indexes of trimolting silkworm had the best performance in spring,amount which the trimolter rate was the highest,94.83%.And the percentage of common cocoons,ratio of double cocoons,cocoon weight,cocoon shell weight and rate of dead cocoons were 94.49%,1.39%,1.615 g,17.92% and 3.51%,respectively.