高抗性家蚕新品种贵蚕9号的选育

目的]选育高抗性家蚕新品种,为贵州省蚕桑产业的进一步发展和提高蚕业的经济效益提供参考。方法]根据育种目标,选择13个二化性带多化性血统的家蚕纯种材料,经2年5代人工高温多湿逆境定向培育改良,同时组配多对杂交组合,在人工高温多湿逆境条件下比较试验,选育出了贵蚕9号。结果]经2年3次室内鉴定,贵蚕9号的4龄万蚕产茧量和万蚕茧层量分别比对照种两广二号高4.23%和5.45%,全茧量、茧层量和茧层率分别比对照高4.54%、5.60%和0.24%。经3县2个蚕期区域试验,克蚁收茧量比对照高6.78%,克蚁产值比对照高6.54%。经3县1个蚕期生产试验,克蚁收茧量比对照高5.71%,克蚁产值比对照高2.97%。经茧丝质检测,贵蚕8号粒茧丝长900.0 m,比对照长3.57%;解舒丝长759.7 m,比对照长4.43%;解舒率和出丝率分别为84.5%和44.1%,比对照分别提高了0.8和0.9个百分点;茧丝纤度比对照低0.1 D;洁净和清洁与对照一致,均为100分。结论]贵蚕9号适宜贵州南部地区高温多湿条件下饲养。

Breeding of A New Silkworm Variety with Higher Resistive Guican 9

Objective] The aim was to breed a new silkworm variety with higher resistive,to provide reference for deeply development of sericulture industry and promoting its economic benefit.Method] 13 silkworm varieties with bivoltine and polyvoltine pedigree were bred by means of 5 times directional breeding under high temperature and humidity circumstances during 2 years and have combined lots of pairs of hybrid combinations and were selected Guican 9 by testing.Result] The results showed the cocoon yield per 10...