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Genetics, Vol 119, 135-140, Copyright © 1988
INVESTIGATIONS |
Restriction Map Variation at the Adh Locus of Drosophila melanogaster in Inverted and Noninverted Chromosomes
M. Aguade
Department de Genetica, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
Restriction map variation among 39 Standard and 40 In(2L)t chromosomes extracted from a Spanish natural population of Drosophila melanogaster was investigated for a 2.7-kb region encompassing the Adh locus with ten four-cutter restriction enzymes. A total of 20 polymorphisms were detected, representing 15 restriction site polymorphisms, 4 length polymorphisms and the allozyme polymorphism. Variation at the DNA level was compared among St-Adh(F), St-Adh(S) and t-Adh(S) chromosomes. t-Adh(S) chromosomes show a higher level of variation than St-Adh(F) chromosomes. This suggests that In(2L)t arose before the fast/slow allozyme divergence in the evolutionary history of D. melanogaster.
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