Gene expression of two fibroin alleles in the hybrid sUkworm, J-131/Nd(2)

Akio Hyodo, Hitoshi Ueda, Fusaho Takei, Ken ichi Kimura, Kensuke Shimuka

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2 Citations (Scopus)


Fibroin gene expression in the posterior silk gland of normal strain (J-131/J-131), JVdstrain (Nd(2)/Nd{2)) and their hybrid (J-131/Nd(2)) silkworms was compared on the levels of fibroin and fibroin mRNA production. The syntheses of both fibroin and fibroin mRNA in the Nd{2) and the hybrid silkworms were greatly reduced when compared with those of the normal silkworm. This result indicates that the Nd(2) gene represses dominantly fibroin gene expression, presumably at the level of transcription of fibroin gene. Estimation of gene products (fibroin and fibroin mRNA) from two fibroin alleles, Fnor and of the hybrid silkworm, J-131/Nd(2), demonstrates that the expression of the fibroin allele SNd derived from MJ(2) mutant strain is more severely repressed than that of the fibroin allele Fnor derived from J-131 strain.

Original languageEnglish
Pages (from-to)551-560
Number of pages10
JournalThe Japanese Journal of Genetics
Issue number5
Publication statusPublished - 1982
Externally publishedYes

ASJC Scopus subject areas

  • Genetics


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