Hidden Electrophoretic Variation at the Xanthine Dehydrogenase Locus in a Natural Population of DROSOPHILA MELANOGASTER

AUTOR(ES)

Ann Buchanan, Barbara

RESUMO

Sixty-two isochromosomal lines of D. melanogaster were screened for cryptic electrophoretic variation at the xanthine dehydrogenase (XDH) locus. Sequential polyacrylamide vertical slab gel electrophoresis was performed using four electrophoretic criteria. A total of 15 classes of electromorphs were revealed. D. melanogaster appears to exhibit as much polymorphism at this locus as other extensively studied Drosophila species.—No evidence for loci on the X or second chromosomes which modified XDH mobility was found. Six of the electromorphs were mapped to the Xdh ( ry) structural locus. Eight of the remaining nine classes exhibited mobility variation consistent with structural variation at the Xdh locus. The final class exhibited aberrant patterns and is under further study.

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