| cytoplasmic incompatibility in drosophila simulans: dynamics and parameter estimates from natural populations. | in drosophila simulans, cytoplasmically transmitted wolbachia microbes cause reduced egg hatch when infected males mate with uninfected females. a wolbachia infection and an associated mtdna variant have spread northward through california since 1986. pcr assays show that wolbachia infection is prevalent throughout the continental us and central and south america, but some lines from florida and ecuador that are pcr-positive for wolbachia do not cause incompatibility. we estimate from natural po ... | 1995 | 7498773 |
| evolutionary inferences from dna variation at the 6-phosphogluconate dehydrogenase locus in natural populations of drosophila: selection and geographic differentiation. | several allozyme-coding genes in drosophila melanogaster show patterns suggesting that polymorphisms at these loci are targets of balancing selection. an important question is whether these genes have similar distributions of underlying dna sequence variation which would indicate similar evolutionary processes occurring in this class of loci. one such locus, 6-phosphogluconate dehydrogenase (pgd), has previously been shown to exhibit clinal variation for fast/slow electromorph variation in the u ... | 1994 | 8138153 |
| genetic variation and differentiation at microsatellite loci in drosophila simulans. evidence for founder effects in new world populations. | drosophila simulans isofemale lines from africa, south america, and two locations in north america were surveyed for variation at 16 microsatellite loci on the x, second, and third chromosomes, and 18 microsatellites, which are unmapped. d. simulans is thought to have colonized new world habitats only relatively recently (within the last few hundred years). consistent with a founder effect occurring as colonizers moved into these new world habitats, we find less microsatellite variability in nor ... | 1998 | 9755208 |