Micro-geographic variation of inversions in natural populations of Drosophila pseudoobscura

Substrate-specific enzyme variation in natural populations of Drosophila pseudoobscura.

By using a number of different alcohols as substrates, eight alcohol dehydrogenase loci were discovered in Drosophila pseudoobscura. Each of these loci can take more than one substrate. Several of these loci differed in their tissue specificities and activity patterns during development. The genic variation in natural populations was studied at four of these loci and three of them were polymorp...

Inversions in the Chromosomes of Drosophila Pseudoobscura.

Genetics of Natural Populations. I. Chromosome Variation in Populations of Drosophila Pseudoobscura Inhabiting Isolated Mountain Ranges.

N RECENT years there appears to be a growing interest in the I genetics of free-living populations, a subject hitherto almost untouched. Certain species of Drosophila prove to be very suitable for investigations in this field. TSCHETWERIKOFF (CHETVERIKOV), DUBININ and their collaborators in Russia, TIMOFEEFF-RESSOVSKY in Germany, GORDON in England, and STURTEVANT in this country have secured mu...

Genetic loads affecting fecundity in natural populations of Drosophila pseudoobscura.

ATURAL populations of every species of Drosophila studied in this respect N carry genetic loads consisting of deleterious variants, usually recessive and concealed in heterozygous condition. Numerous studies have been made on the viability components of the genetic loads, i.e., on the variants that reduce the viability of their carriers. The components that reduce the fertility have received re...

Genomics of Natural Populations: How Differentially Expressed Genes Shape the Evolution of Chromosomal Inversions in Drosophila pseudoobscura

Chromosomal rearrangements can shape the structure of genetic variation in the genome directly through alteration of genes at breakpoints or indirectly by holding combinations of genetic variants together due to reduced recombination. The third chromosome of Drosophila pseudoobscura is a model system to test hypotheses about how rearrangements are established in populations because its third ch...