X-linked and autosomal inheritance patterns of homologous genes in two species of Tribolium. Academic Article uri icon


  • The tenebrionid beetles Tribolium castaneum and T. 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 of T. confusum was derived from the ancestral 9AA + XY formula, still present in T. castaneum, via the fusion of one pair of autosomes with the X and Y chromosomes during the early divergence of the confusum and castaneum species groups. In the present paper, electrophoretic variation in malic enzyme and hexokinase-1, detected in laboratory strains in Tribolium, is described. Evidence is presented that the genes encoding variation in both enzymes are autosomal in T. castaneum but are X linked in T. confusum. These species-specific patterns of inheritance of homologous gene loci are consistent with the hypothesized karyotypic history of the genus.

published proceedings

  • Biochem Genet

author list (cited authors)

  • Samollow, P. B., Dawson, P. S., & Riddle, R. A.

citation count

  • 13

complete list of authors

  • Samollow, PB||Dawson, PS||Riddle, RA

publication date

  • February 1983