家蚕天然黄色茧新品种“金秋×初日”的选育

Breeding of Silkworm(Bombyx mori) Hybrid “Jinqiu × Churi” with Natural Yellow Cocoon Color

采用目标基因导入、杂交、回交等育种手段,育成了家蚕天然黄色茧新品种"金秋×初日"。据2013、2014年两年浙江省5个蚕品种实验室鉴定,对照彩色茧蚕品种实验室鉴定项目与指标全部达到:色彩明显,耐水色牢度3~4级;四龄起蚕虫蛹率97.40%,比对照种高0.4个百分点;万蚕产茧量18.04 kg,比对照种高2.44%;净度94.80分。据2015、2016年两年2个农村生产试验点鉴定结果平均成绩:张种产茧44.7 kg,张种产值1620元,比对照种分别高6.1 kg、227元;健蛹率95.72%,比对照高10.67%。据缫丝试样调查,一茧丝长1053 m、解舒丝长576 m、干茧出丝率36.14%、净度93分,与对照种比,分别长26 m、长12 m、低0.46个百分点、相同,达到彩色茧蚕品种生产鉴定各项指标的要求。

The new silkworm varieties Jinqiu and Churi was bred through the target gene introduction, crossing and backcrossing techniques. According to the combining identification of 5 silkworm rearing laboratories for two years of2013 and 2014 in Zhejiang Province showed that performance of the hybrid ＂Jinqiu × Churi＂ was meet all the required indexes if compared with the control hybrid： bright color, color fastness to water reached level 3-4; larval-pupa rate was97.40%, 0.4 percentage points higher than the control; cocoon production of ten thousands silkworm was 18.04 kg,2.44% higher than the control; neatness is 94.80. According to the farmers＇ testing rearing results of two different cities from years of 2015 and 2016, average performance showed： fresh cocoon production 44.7 kg per box, cocoon value of1620 yuan per box, which is 6.1 kg higher and 227 yuan more than then control respectively; healthy pupa rate was95.72%, 10.67% higher than the control. According to the sample testing of cocoon reeling： cocoon filament length was1053 m, non-broken filament length was 576 m, silk rate of dry cocoon was 36.14%, neatness was 93 points, they were26 m longer, 12 m longer, 0.46 points lower, and the same if compared with the control, respectively. All the characteristics meet the requirements of various indexes set for commercial production of color cocoon silkworm hybrid.