柞蚕白茧品种白茧1号选育

以褐茧品种青六号为选育基础材料,采用系统分离选择,并运用荧光选择方法,经9年18代选育,于1986年育成我国第一个柞蚕白茧品种白茧1号。该品种系青蚕系统,二化性,早熟;幼虫体色橄榄绿,蛾色为芒果棕色。与青六号对比:茧层白度超过对照种35.1度,生丝白度提高14.3度。茧质好,解舒优,解舒剂用量减少25—32％,鲜茧出丝率提高10.67％,生丝品位高,染色性好。是个好养、抗病、高产、稳产,适合于二化性柞蚕区饲养的优良白茧品种。

BREEDING OF WHITE COCOON VARIETY "BAIJIAN 1" OF CHINESE TUSSAH SILKWORM

The white cocoon variety of "Baijian 1" of Chinese tussah silkworm (Antheraea pernyi) was firstly selected from the tawny cocoon variety "Qing 6" in 1986 by means of pedigree selection and fluorescence spectrum selection after 9 years i.e. 18 generations. This variety comes from the green silkworm line of bivoltine tussah, and is early mature. The body colour of the grown larva is olive-green, but the moth's is mango-brown. The white cocoon exceeds tawny cocoon 35. 1 degrees in whiteness. The cocoon has better reelability. Its consumption of unwinding agent reduced 25-32%, and the raw silk percentage of its fresh cocoon increased 10. 67% compared with "Qing 6". Its raw silk exceeds tawny cocoon's by 1 4. 3 degrees and is excellent in brightness, feeling, intensity ,size deviation ,tenacity and elongation,as well as the dyeing. The variety is good for rearing and has better food prefernce, high disease-resistance; It also has high and stable yield and is suited for the popularization in bivoltine tussah silkwoom raising regions.