Araucaria: A Relict Genus

Patterns of genetic diversity in southern and southeastern Araucaria angustifolia (Bert.) O. Kuntze relict populations

Habitat fragmentation and a decrease in population size may lead to a loss in population genetic diversity. For the first time, the reduction in genetic diversity in the northernmost limit of natural occurence (southeastern Brazil) of Araucaria angustifolia in comparison with populations in the main area of the species continuous natural distribution (southern Brazil), was tested. The 673 AFLPs...

Relict species: a relict concept?

Relict species have always beguiled evolutionary biologists and biogeographers, who often view them as fascinating 'living fossils' or remnants of old times. Consequently, they are believed to provide interesting and important information on a vanished past and are used to understand the evolution of clades and biotas. The information that relicts provide can, however, be misleading and overemp...

The rise and fall of the genus Araucaria: A Southern Hemisphere climatic connection

Is Stellate a relict meiotic driver?

Is Stellate a Relict Meiotic Driver? X 0 males of Drosophila melanogaster are sterile. Associated with this sterility is the presence of crystals in the sperm. Crystal production is determined by the Stellate (Ste) locus which maps to position 45.7 on the X chromosome (HARDY et al. 1984). Expression of stellate is repressed in normal males by Suppressor of Stellate Su(Ste) on the Y chromosome j...

The Relict Darter ,

The distribution, microhabitat affinity and availability, and conservative estimates of numbers of Etheostorna chienense, the relict darter, were assessed. All known historical sites and sites in nearby drainages that might harbor the species were surveyed. The relict darter is endemic to the Bayou du Chien drainage, Graves and Hickman counties, Kentucky, where it is most abundant in Jackson Cr...