强健性蚕品种海的育成及云·山×东·海的选配

Breeding of a Healthy Silkworm Race Hai and Selective Combination of Yun·Shan×Dong·Hai

采用杂交、定向培育、系统选择的方法 ,育成强健性多丝量品种海 ,并引进苏花、871组配成云·山×东·海的四元杂交组合。经 5个攻关点联合鉴定表明 ,万蚕收茧量 17 5 3kg、万蚕茧层量 4 179kg、茧丝长 1184m、解舒丝长 90 7m、鲜毛茧出丝率 18 5 %、洁净 94 98分 ,主要经济指标全面超过对照种。已通过国家农作物品种审定委员会审定 。

Yu·Shan×Dong·Hai,a four way hybrid,has been bred through hybridization,directive breeding combined with line selection.The hybrid was jointly identified on five sites of national identification net.Its cocoon crop and cocoon shell weight per 10,000 4th instar larvae are 17.53kg and 4.179kg respectively.The length of single cocoon filament is 1,184m,reelability 76.6%.The raw silk rate of fresh cocoon is 18.5%,neatness is 94.98.Main economical indexes are higher than those of the control race.The hybrid has been authorized by the National Crop Variety Identification Committee for commercial production.