Biochemical Genetics

, Volume 21, Issue 1–2, pp 167–176 | Cite as

X-linked and autosomal inheritance patterns of homologous genes in two species ofTribolium

  • Paul B. Samollow
  • Peter S. Dawson
  • Russel A. Riddle
Article
  • 16 Downloads

Abstract

The tenebrionid beetlesTribolium castaneum andT. confusum are representative of two distinct species groups within their genus. It has been suggested [Smith, S. G. (1952).J. Morphol.91:325] that the 8AA + neo-XY karyotype ofT. confusum was derived from the ancestral 9AA + XY formula, still present inT. castaneum, via the fusion of one pair of autosomes with the X and Y chromosomes during the early divergence of theconfusum and castaneum species groups. In the present paper, electrophoretic variation in malic enzyme and hexokinase-1, detected in laboratory strains inTribolium, is described. Evidence is presented that the genes encoding variation in both enzymes are autosomal inT. castaneum but are X linked inT. confusum. These species-specific patterns of inheritance of homologous gene loci are consistent with the hypothesized karyotypic history of the genus.

Key words

Tribolium X linkage malic enzyme hexokinase electrophoresis 

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Copyright information

© Plenum Publishing Corporation 1983

Authors and Affiliations

  • Paul B. Samollow
    • 1
  • Peter S. Dawson
    • 1
  • Russel A. Riddle
    • 1
  1. 1.Department of Zoology and Genetics ProgramOregon State UniversityCorvallis

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