Characteristics of the recombinant between E-pseudoalleles, ECw and EKp, in the silkworm, Bombyx mori.

• HIROKAWA MASAHIKO

  Fukushima Sericultural Experiment Station

Bibliographic Information

Other Title

• カイコの<i>E</i>偽対立遺伝子群に所属する<i>E^Cw</i>と<i>E^Kp</i>との組換型個体の形質

Abstract

Recombination was confirmed to occur between E-pseudoallelic genes, E^Cw (Extracrescents and extra-wings) and E^Kp (Kp-supernumerary legs), and the characteristics of the recombinants were clarified. The E^Cw E^Kp/++ larvae showed extra crescent markings on the 1st abdominal segment and extra abdominal legs on the 1st and 2nd abdominal segments, whereas the E^Cw E^Kp/E^Cw E^Kp larvae showed extra crescent markings on the 1st and 3rd abdominal segments and extra legs on the 1st and 2nd abdominal segments. Although the two pairs of extra legs of the E^Cw E^Kp heterozygous larva and a pair of extra legs on the 2nd abdominal segment of the E^Cw E^Kp homozygous larva resembled abdominal legs, a pair of extra legs on the 1st abdominal segment of the homozygous larva resembled both thoracic legs (anterior half) and abdominal legs (posterior half). In a few cases, the distal ends of the extra legs on the 1st abdominal segment of the homozygous larvae were forked into two branches. Most of the E^Cw E^Kp homozygous larvae showed degenerated spiracles on the 1st abdominal segment. In the adult stage, some of the E^Cw E^Kp homozygous moths showed extra thoracic legs and extra wings on the 1st abdominal segment. However, the frequency of moths with extra wings was lower than that observed in the E^Cw homozygous moths. The hind wings of the E^Cw E^Kp homozygous moths were smaller in size than those of normal moths, and both meta-thoracic and extra thoracic legs were immobile. Although copulation was extremely difficult for male moths, their fertilization ability was normal when copulation was successful, resulting in offspring from the sib cross of the E^Cw E^Kp homozygotes.

Journal

• The Journal of Sericultural Science of Japan

  The Journal of Sericultural Science of Japan 68 (1), 41-47, 1999

  The Japanese Society of Sericultural Science

Keywords

• <i>E</i> mutant group
• pseudoallele
• recombination
• homeotic gene
• position effect
• <i>Bombyx mori</i>

Details

• CRID: 1390001204528374144
• NII Article ID: 10010266274
• NII Book ID: AN00190300
• DOI: 10.11416/kontyushigen1930.68.41
• ISSN: 1884796X
• ISSN: 00372455
• NDL BIB ID: 4671155
• Web Site: https://agriknowledge.affrc.go.jp/RN/2010582411
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4671155
• Text Lang: en
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • CiNii Articles
• Abstract License Flag: Disallowed