陕蚕系列原种产卵性状比较研究

试验结果表明，在环境条件一致的情况下，陕蚕系列原种的产卵性能表现为陕４＞陕３＞陕２。同一品种春繁与秋繁相比，造卵数平均增加２４．５３％，良卵数增加３９．５２％，良卵率提高５．５２％，产出卵增加３１．３％，产出率提高４．３％，不受精卵率下降５．３８％，死卵率下降０．４３％。与品种审定时的产卵性能指标相比，陕蚕２号平均单蛾产卵数下降１９．５１％，良卵率下降５．６５％；陕蚕３号单蛾卵数下降８．４％，良卵

Study on Oviporsiting Character of Shaancan Silkworm Original Strains

The experiment results showed that there is significant difference among the oviporsiting characters of Shaancan silkworm original strains under the same enviromental conditions.The order of oviporsiting ability is Shaancan No.4,Shaancan No.3,Shaancan No.2 from high to low.A s com pared with autumn reproduction,average of owning eggs per month,No.of good eggs,rate of good eggs,No.of oviporsition and rate oviporsiting eggs have increased by 24.53,39.52%,5.52%,31.3% and 4.3% respectively by means of spring reproduction.At the same time,the rate of unfertilized eggs and rate of dead eggs have decreased 5.38% and 0.43% respectively through spring reproduction.Now,as com pared with the time whenthe breed was released,the No.of oviporsiting eggs per month in Shaancan silkworm No.2 has decreased by 19.5%,and the rate of good eggs has decreased by 5.65%;the No.of oviporsiting eggs per month in Shaancan silkworm No.3 has decreased by 8.4%,and the rate of good eggs has decreased by 4.16%;the No.of oviporting eggs per month in Shaancan silkworm No.4 has decreased by 16.19%,and the rate of good eggs has decreased by 3.5%.Starting with origfinal strain of authorized race,paying attention to arragement of mulberry plantation,improving qualigy of mulberry leaf and feeding techniques,focusing on the selection of oviporsiting charactors under the prerequisite of ensuring stability of other Characters will be the effective ways to ensure the stability of oviporsiting characters in Shaancan silkworm breads.