Biochemical Genetics

, Volume 24, Issue 1–2, pp 13–24 | Cite as

Genetical and biochemical comparisons of alcohol dehydrogenase isozymes from Anastrepha fraterculus and A. obliqua (Diptera: Tephritidae): Evidence for gene duplication

  • Sergio Russo Matioli
  • J. S. Morgante
  • A. Malavasi


The electrophoretic patterns of the enzyme alcohol dehydrogenase (ADH) from Anastrepha fraterculus and A. obliqua were studied. Two loci were found to code for the enzyme in A. fraterculus, and three in A. obliqua. In both species, all isozymes were active in third-instar larvae. A cationic isozyme (Adh-1) was active mainly in the visceral fat body of both species. In A. fraterculus, the locus had an anionic polymorphic isozyme (Adh-3) that was detected in the parietal fat body. In addition to these two loci, a third locus for an anionic isozyme (Adh-2), which was active in the digestive tube of larvae, was present in A. obliqua and probably resulted from gene duplication. For both species, multiple forms of the isozymes are formed by binding of an NAD-carbonyl compound, as in Drosophila melanogaster. Both larvae and early pupae of A. obliqua had almost twice the specific ADH activity as A. fraterculus. The ethanol content of the host fruit infested with A. obliqua (red “mombim”) was also higher than that of the host fruit infested with A. fraterculus (guava).

Key words

alcohol dehydrogenase gene duplication Anastrepha enzyme evolution South American fruit fly 


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Copyright information

© Plenum Publishing Corporation 1986

Authors and Affiliations

  • Sergio Russo Matioli
    • 1
  • J. S. Morgante
    • 1
  • A. Malavasi
    • 1
  1. 1.Departmento de Biologia, Instituto de BiociênciasUniversidade de São PauloSão Paulo/SPBrasil

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