The use of methods for controlling the reproduction of the silkworm (<i>Bombyx mori L.</i>) in practical sericulture

Relevance. The importance of breeding in increasing the productivity of agricultural animals can be perfectly demonstrated on the mulberry silkworm. For 5 thousand years, continuous selection was carried out, the main feature for which was silkiness. However, the more productive the object becomes, the more difficult and complicated traditional breeding turns out to be. Methods. New methods of breeding can be developed as a result of the use of artificial methods of reproduction. The implementation of all methods of artificial reproduction known to science (ameiotic and meiotic parthenogenesis, gynogenesis, androgenesis, polyploidy) with various cytogenetic mechanisms and methods of sex regulation to the silkworm has opened up new experimental possibilities. This makes it possible to control the inheritance of traits in a population within a wide range, which is especially effective when using artificial breeding methods in combination, for example, when breedinghybridizing parthenogenetic clones and sex-determined silkworm. Mеthods of breeding, preservation and use of genetically modified silkworm breeds have been worked out and repeatedly tested. Results. The industrial hybrids created in our research by breeding parthenogenetic clones and sex-labeled breeds at the egg stage are characterized by high heterosis in caterpillar viability (95.0–96.0%), ease of preparation of hybrid grene, economic benefits due to the abolition of breeding work, cocoon sorting, as well as expensive, lengthy and very inaccurate cocoon division by gender.

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