家蚕新品种粤枫三号(五·选×28·32)的育成

通过系统分离选育,对现行生产主要家蚕品种和引进育种素材进行改良提高,并经杂交组配筛选,育成了家蚕四元一代杂交种粤枫三号(五.选×28.32)。实验室鉴定及农村饲养和种场繁育的结果表明,该品种综合经济性状优良:抗逆性和耐氟污染能力强,孵化、眠起、老熟齐一;茧形大,茧层厚,产茧量较对照两广二号提高9.47%,茧丝质优良,一粒茧丝长1028 m,解舒丝长761 m,洁净92.25分;原蚕容易饲养,蚕种繁殖系数高。该品种已通过广东省农作物品种审定,适合在珠江流域等华南蚕区全年推广饲养。

Breeding of the New Silkworm Variety Yuefeng No.3 (Wu·Xuan×28·32)

By using hybridization and pedigree selection methods etc.,and improving main commercial varieties and introduced varieties,a new silkworm variety Yuefeng No.3(namely Wu·Xuan×28·32) of quaternary F1 hybrid was bred.The results of laboratory identification,countryside rearing and multiplication in silkworm egg farm showed it is a variety of strong anti-adversity and fluoride endurance ability,uniform hatching,molting and maturing.The cocoon shape is large with thick cocoon shell.Compared with the control variety 9·Fu×7·Xiang,its cocoon crop increases by 9.47%.It is of high-grade silk,its cocoon filament length 1 028 m,non-broken filament length 761 m and neatness 92.25 points. Its parent silkworms are easy to rear with high multiplication coefficient of silkworm eggs.The new silkworm variety has been passed the approval of crop of Guangdong Province for its good comprehensive economic character.It is suitable for rearing in the Pearl River valley and other sericulture areas in south China all the year round.