FECUNDITY OF HYBRIDS BETWEEN GEOGRAPHIC POPULATIONS OFDROSOPHILA PSEUDOOBSCURA

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...

The congruence between matrilineal genetic (mtDNA) and geographic diversity of Iranians and the territorial populations

Objective(s):From the ancient era, emergence of Agriculture in the connecting region of Mesopotamia and the Iranian plateau at the foothills of the Zagros Mountains, made Iranian gene pool as an important source of populating the region. It has differentiated the population spread and different language groups. In order to trace the maternal genetic affinity between Iranians and other populatio...

Segregation distortion in hybrids between the Bogota and USA subspecies of Drosophila pseudoobscura.

We show that, contrary to claims in the literature, "sterile" males resulting from the cross of the Bogota and USA subspecies of Drosophila pseudoobscura are weakly fertile. Surprisingly, these hybrid males produce almost all daughters when crossed to females of any genotype (pure Bogota, pure USA, hybrid F1). Several lines of evidence suggest that this sex ratio distortion is caused by sex chr...

On the Sterility of the Interracial Hybrids in Drosophila Pseudoobscura.

Genetics of Natural Populations. V. Relations between Mutation Rate and Accumulation of Lethals in Populations of Drosophila Pseudoobscura.

ATURAL populations of Drosophila pseudoobscura have been shown N to carry numerous recessive mutant genes concealed in heterozygous condition (STURTEVANT 1937, DOBZHANSKY and QUEAL 193813, DOBZHANSKY 1939). Some of these genes are lethal or semilethal, others produce visible external effects, and still others modify the viability, duration of the development, or other characters. Although the l...