Key principles for breeding spring-and-autumn using silkworm varieties: from our experience of breeding ۸۷۳ × ۸۷۴

The successfully breeding of the hybrids ۸۷۳?۸۷۴ had settled the problem that the yield was not uniform to the silk quality in silkworm varieties. In this paper, we illuminated the key technology, principle, hints and methods for selection in breeding spring-and-autumn rearing silkworm varieties were analyzed using the procedure of breeding the hybrid of ۸۷۳ × ۸۷۴ as example.   REFERENCES He, S.M. et al. (۱۹۹۸). Breeding of summer-autumn using silkworm varieties ۴۱۵ and ۴۱۶ and the preparation of their hybrids. Acta Sericologica Sinica, ۲۴, ۲۱۵-۲۲۰. He, S.M. et al. (۱۹۹۸). Breeding of vigorous and hypersilkgeneous silkworm varieties ۸۷۱ and ۸۷۲. Acta Sericologica Sinica, ۲۴, ۸۶-۹۰. He, S.M. et al., (۲۰۰۰). Breeding of vigorous and hypersilkgeneous silkworm varieties ۸۷۱ and ۸۷۲. A report of the ۹th Five Year Plan on Silkworm Breeding. June ۲۰۰۰.

کلیدواژه ها:

Breeding ، ۸۷۳?۸۷۴ ، key technology