Sequence polymorphisms around the 5′-end of the silkworm fibroin H-chain gene suggesting the occurrence of crossing-over between heteromorphic alleles

Ueda Hitoshi, Mizuno Shigeki, Shimura Kensuke

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Nucleotide sequences around the 5′-ends of the silkworm fibroin H-chain genes of the three strains, Nd[2), J-139, and F1(Gunka × Hoshun), of Bombyx mori were determined. Comparison of the sequences among these strains and the sequences reported previously for the two other strains, F1(Gunpo × Shugyoku) and Daizo, indicates that polymorphisms are present in the 5′-flanking and intron regions and that each region has at least two sequence variants independent of each other. These results suggest that crossing over between the heteromorphic H-chain alleles has occurred during the breeding of these strains.

Original languageEnglish
Pages (from-to)351-355
Number of pages5
JournalGene
Volume34
Issue number2-3
DOIs
Publication statusPublished - 1985
Externally publishedYes

Keywords

  • A phage
  • Bombyx mort
  • Recombinant DNA
  • deletions
  • gene cloning
  • insertions
  • intron
  • plasmid vector pBR322

ASJC Scopus subject areas

  • Genetics

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