The Journal of Silk Science and Technology of Japan
Online ISSN : 1881-1698
Print ISSN : 1880-8204
ISSN-L : 1880-8204
Feeding response to artificial diet and mounting efficiency of crossed F1-hybrid of high-strength silk thread producing silkworm strain MC502 and standard silkworm strain J137
Masatoshi IgaTetsuya IizukaEiji Okada
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2024 Volume 32 Pages 43-47

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Abstract

Silk is a natural fiber with excellent mechanical properties. However, the development of higher strength silk is anticipated to expand its applications. The F1-hybrid of the high-strength silk thread producing silkworm strain MC502 developed through selective breeding and standard silkworm strain J137 exhibits retention of high-strength characteristics of MC502, with markedly better raw silk yield compared to MC502. However, the feeding response of artificial diet and mounting efficiency, which are important for practical use, have not been evaluated. Therefore, we investigated the feeding response of artificial diet and mounting efficiency, in MC502×J137 and J137×MC502. Because both strains ate an artificial diet for general strains of silkworm and reached second instar development, they can use artificial diet rearing during young instars of silkworms: the current mainstream sericultural practice. Furthermore, the mounting efficiency of MC502×J137 and J137×MC502 was better than that of the standard strain, J137×C146. These results demonstrate that no important difficulties exist to hinder the practical use of the F1-hybrid of MC502 and J137.

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© 2024 by The Japanese Society of Silk Science and Technology
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