Genic Heterogeneity at Two Alcohol Dehydrogenase Loci in DROSOPHILA PSEUDOOBSCURA and DROSOPHILA PERSIMILIS
AUTOR(ES)
Coyne, Jerry A.
RESUMO
A sequential electrophoretic survey of the second chromosome loci, alcohol dehydrogenase-6 (Adh-6) and octanol dehydrogenase ( Odh), was performed on 147 isochromosomal lines of Drosophila pseudoobscura and 60 lines of its sibling species, D. persimilis. Gels run with a variety of acrylamide concentrations and buffer pH's revealed the presence of 18 alleles of Adh-6 in the two species, where only eight had been previously detected by conventional electrophoretic methods. Only two alleles were added with our techniques to the previous total of nine in both species at the largely monomorphic Odh locus. Both enzymes show a predominance of one allele, with the other variants being fairly rare. There was no evidence of increased genetic divergence between the two species, but we found a striking increase in differentiation of Adh-6 alleles between the main body of D. pseudoobscura populations and the conspecific isolate from Bogotá, Colombia. These results are compared with our previous surveys of xanthine dehydrogenase in these species and discussed in reference to theories of genic polymorphism.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1213741Documentos Relacionados
- Genic Heterogeneity within Electrophoretic "Alleles" and the Pattern of Variation among Loci in DROSOPHILA PSEUDOOBSCURA
- Examination of Allelic Variation at the Hexokinase Loci of DROSOPHILA PSEUDOOBSCURA and D. PERSIMILIS by Different Methods
- Genetic Heterogeneity within Electrophoretic "Alleles" of Xanthine Dehydrogenase in DROSOPHILA PSEUDOOBSCURA
- GENIC VARIATION IN A NATURAL POPULATION OF Drosophila persimilis*
- Genetic Variation for Dispersal by DROSOPHILA PSEUDOOBSCURA and DROSOPHILA PERSIMILIS
