家蚕抗血液型脓病新品种‘农科5号’原种繁育试验

Original Seed Breeding Study of‘Nongke No.5’:A Novel Silkworm Variety Resistant to Hemolymphatic Sepsis

‘农科5号’是浙江省农业科学院蚕桑与茶叶研究所育成的一对抗血液型脓病中丝量斑纹限性四元杂交家蚕新品种。为全面了解新品种4个原原种的特性,掌握原种繁育技术,开展了‘农科5号’原种繁育试验。结果显示,与对照原原种‘秋丰F’‘白玉B’相比,‘农科5号’原原种表现为:‘春日乙N’龄期经过较长;‘华光甲N’‘春日乙N’全茧量高,茧层厚,茧层率高;‘秋丰AN’‘白玉AN’一茧丝长、解舒丝长长,解舒率高,茧丝纤度略粗,洁净分高;各原原种产卵量高,但良卵率、实用孵化率略低。

‘Nongke No.5’,a novel quad hybridization silkworm(Bombyx mori)variety exhibiting resistance to hemolymphatic sepsis,has been developed by the Institute of Silkworm and Tea Research at the Zhejiang Academy of Agricultural Sciences.To comprehensively understand the characteristics of the four parent species of the new variety,we master the breeding techniques for these progenitors and conduct original seed breeding experiments on the‘Nongke No.5’.The results indicated that compared to the control original breeds‘Qiufeng F’and‘Baiyu B’,the original breeds of‘Nongke No.5’demonstrated the following performance:a longer instar period for‘Chunriyi N’;higher total cocoon weight,thicker cocoon layers,and a higher cocoon layer rate for‘Huaguangjia N’and‘Chunriyi N’;longer single cocoon filament length and raw silk filament length,with a higher reelability,slightly coarser silk fineness,and a higher cleanliness score for‘Qiufeng AN’and‘Baiyu AN’;all original breeds had a high egg production,despite the rate of quality eggs and practical hatching rate were marginally lower.