家蚕新品种云松×云月的选育

Selection and breeding of silkworm new variety Yunsong×Yunyue

将经杂交选育后直接组配成4元杂交种。经各试验点比试成绩优良，万蚕产茧量20．71～21．64kg，万蚕茧层量5．37～5．52kg，解舒丝长1090～1119m，各项经济指标达到和超过全国农作物品种审定委员会蚕桑专业委员会制定的选育标准。

According to previousl design, by crossing and selection, the twain races had been assembled tetra hybrid, which perform best in multiple location test ： cocoon crop per 10 000 four-instar silkworms 20.71 - 21.64 kg, cocoon shell weight per 10 000 four-instar silkwomrs 5.37 - 5.52 kg, length of non-broken cocoon filament 1090- 1119 m, each economy index reached and exceeded authorized standard.