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目的:为选育经济性状优良的宽体金线蛭新品种。方法:以江苏里下河地区野生宽体金线蛭为材料,以生长速度为指标,选择个体体重18.00 g以上构建宽体金线蛭选育群体,比较选育群体与普通群体繁殖及F1代养殖生产性状。结果:选育群体每10㎏亲蛭产茧1.81㎏,较普通群体提高了63.04%,卵茧规格较普通群体明显增大(P<0.01),亲蛭体重下降率及卵茧平均出苗率选育群体与普通群体无明显变化(P>0.05);选育群体F1养殖产量、均重及成活率较普通群体分别提高了55.69%、17.18%和33.17%,差异极显著,特定生长率及增重率明显高于普通群体(P<0.01),而干物质比2个群体F1代差异不显著(P>0.05)。结论:通过群体选育可以有效提高宽体金线蛭繁殖和养殖性能。
Objective: To breed new varieties of broad-leaved gold line Hirudo with good economic traits. Methods: Based on the growth rate of wild Hirudo nipponensis in Lixiahe area of Jiangsu Province, we selected the individuals with the body weight of 18.00 g or more to construct the broadleaved gold line Hirudo breeding population and compared the breeding and F1 generation Breeding production traits. Results: The cocoon production rate of 1.18% was higher in the breeding population than that in the general population (63.01%), and that in the normal population was significantly higher than that in the normal population (P <0.01) There was no significant difference between the breeding population and the general population (P> 0.05). The yield, the average weight and the survival rate of F1 breeding increased by 55.69%, 17.18% and 33.17% respectively compared with the general population, the difference was significant, the specific growth rate The re-rate was significantly higher than that of the general population (P <0.01). However, the dry weight was not significantly different from that of the two populations (P> 0.05). Conclusion: The population breeding can effectively improve the propagation and culture of Hirudo broadleaf.