Can sibling species of the Drosophila willistoni subgroup be recognized through combined microscopy techniques?

The willistoni group of sibling species of Drosophila.

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Interspecific and intraspecific comparisons of the period locus in the Drosophila willistoni sibling species.

The period (per) locus has received much attention in molecular evolution studies because it is one of the best studied "behavioral genes" and because it offers insight into the evolution of repetitive sequences. We studied most of the coding region of per in Drosophila willistoni and confirmed previously observed patterns of conservation and divergence among distantly related species. Five reg...

Enzyme variability in the Drosophila willistoni group. I. Genetic differentiation among sibling species.

We have studied by gel electrophoresis the variability of 14 structural genes in four sibling species, Drosophila willistoni, D. paulistorum, D. equinoxialis, and D. tropicalis. Samples of about 30 populations from different parts of the distribution areas of each species were examined. Genetic variants are found at every locus; 67% of the loci are polymorphic, having two or more alleles, the r...

Enzyme variability in the Drosophila willistoni group. IV. Genic variation in natural populations of Drosophila willistoni.

We describe allelic variation at 28 gene loci in natural populations of D. willistoni. Seventy samples were studied from localities extending from Mexico and Florida, through Central America, the West Indies, and tropical South America, down to South Brazil. At least several hundred, and often several thousand, genomes were sampled for each locus. We have discovered a great deal of genetic vari...

Can Male Fertility Be Improved Prior to Assisted Reproduction through The Control of Uncommonly Considered Factors?