Preliminary Report on Breeding of Coarse Size Variety CU₁×CU₂ of Bombyx mori L
Zhao, Yuan;Wu, Yangchun;Qian, Heying;He, Yiyuan;He, Simei(Chinese Academy of Agricultural Sciences, Zhenjiang, P. R. China)E-mail:[email protected]
A number of Chinese, Japanese and European silkworm strains with coarse size filament were used for breeding the coarse size variety. Through cross breeding combined with pedigree selection within thirteen generations, a pair of coarse size silkworm variety, named CU₁×CU₂, was obtained after five years. Laboratory trials showed that the filament size of its F₁ hybrid was over 4.3 D, and the other economic characters were also good.
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