Biochemical Genetics

, Volume 29, Issue 7–8, pp 337–344 | Cite as

Genetics and polymorphism of a duplicated malate dehydrogenase (MDH) locus in the grasshopperOxya japonica japonica (Orthoptera:Acrididae:Oxyinae)

  • K. L. Chan
  • Y. Yushayati
  • P. Guganeswaran
Article

Abstract

A biochemical genetic study of the enzyme malate dehydrogenase (MDH) was conducted in the grasshopperOxya j. japonica. Analysis of MDH electrophoretic variation in this species of grasshopper shows that one of the two autosomal loci for MDH in grasshoppers, the Mdh-2 locus, controlling the anodal set of MDH isozymes, is duplicated. Results of breeding studies confirm this and the observed polymorphism at theMdh-2 locus in the two populations ofOxya j. japonica studied can be attributed to three forms of linked alleles at the duplicated locus in equilibrium in both populations. In this respect, all individuals of this species possess heterozygous allelic combinations at the duplicatedMdh-2 locus, which may account for the spread of the duplicated locus in the populations of this species of grasshopper.

Key words

grasshopper Oxya japonica japonica malate dehydrogenase duplicated gene polymorphism 

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Copyright information

© Plenum Publishing Corporation 1991

Authors and Affiliations

  • K. L. Chan
    • 1
  • Y. Yushayati
    • 1
  • P. Guganeswaran
    • 1
  1. 1.Department of Genetics & Cellular BiologyUniversity of MalayaKuala LumpurMalaysia

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