Inheritance of one cocoon shape mutant named "flossy cocoon" of the silkworm, Bombyx mori

Yutaka Banno, Hiroshi Fujii, Hiroshi Doira

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1 Citation (Scopus)


In Bombyx mori a dominant, autosomal mutation was confirmed to produce loosely constructed, elliptic cocoons, which have a cotton-like texture. The mutant gene was named "flossy" with the symbol Fl after a previous achievement by Takasaki. Genetic analysis applying the genes q and obt as markers mapped the Fl locus to the 32.1 position on the seventh linkage group. The normal individuals segregating from Fl in a cross, using the q gene as a marker, gave tight cocoons with a peanut-like shape. No characteristics except the cocoon size and shape were different between Fl and normal individuals. It was concluded that the Fl gene function was related to the spinning behavior during the cocoon formation.

Original languageEnglish
Pages (from-to)189-192
Number of pages4
JournalJournal of Insect Biotechnology and Sericology
Issue number3
Publication statusPublished - 2001

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Applied Microbiology and Biotechnology
  • General Business,Management and Accounting
  • General Agricultural and Biological Sciences
  • Insect Science
  • Industrial and Manufacturing Engineering


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