Abstract Background Open cast lignite mines, sand pits and military training areas represent human-made, secondary habitats for specialized xerothermophilous psammophilous species. Rare species, including the earwig Labidura riparia, are found in high population densities such sites. However, it is unknown from which sources colonisation took place how genetic variation compares to that of anci...

Dear Editor Analysis of the phenylalanine hydroxylase (PAH McKusick 261600) gene in different populations has revealed more than 320 different mutations associated with phenylketonuria (PKU). One of these mutations, IVS10nt546, results in severe PAH deficiency due to defective mRNA splicing. It accounts for about 40 percent of all mutant alleles in Turkish and between 10 to 20 percent of all mu...

questions. The most obvious is, why do female guppies prefer males with uncommon colour patterns? Here we have more hypotheses than data sets. One theoretical analysis suggests that greater survival of rare male types, which has been found in guppies, might contribute to the evolution of such a preference, even if it is costly. Interestingly, the same analysis points out that the negative feedb...

Abstract Rare populations, such as endangered animals and plants, drug users individuals with rare diseases, tend to cluster in regions. Adaptive sampling is generally applied obtain information from clustered sparse populations since it increases survey effort areas where the of interest are observed. This work proposes a unit-level model which assumes that counts related auxiliary variables, ...

inhibitor development is a lifelong challenge for patients with bleeding disorders who received replacement therapy. most commonly, inhibitor formation was observed in hemophilia a patients but patients with rare bleeding disorders (rbd) especially patients with deficiency of factor xiii (fxiii) and factor v (fv) can develop an inhibitor against exogenous factors. several factors considered as ...

A recent study reports frequency-dependent survival within highly variable guppy populations. Fitness advantages to rare genotypes may help maintain variation within populations, but the mechanisms underlying these advantages require further study.

Mutations provide the raw material of evolution, and thus our ability to study evolution depends fundamentally on having precise measurements of mutational rates and patterns. We generate a data set for this purpose using (1) de novo mutations from mutation accumulation experiments and (2) extremely rare polymorphisms from natural populations. The first, mutation accumulation (MA) lines are the...

A rare moss Buxbaumia aphylla was only recently found in Croatia. Here we report five new localities, one from Dilj Gora and four Mt. Papuk. Small populations on bare acidic soil within the forest along edges were registered.

Along the Oregon coast there are pockets of exceptionally high diversity of rare lichen species. These include a number of extreme disjunct populations, with affinities to the flora of the southern hemi­ sphere, tropical and subtropical areas, California, northeast Asia, maritime Arctic, eastern North America, and Europe. Only two of these rare species are endemic to the Pacific Northwest. Conc...

in general, both common illnesses and rare diseases can develop in people and their relatives in families. therefore, taking family history is an effective screening tool to detect such diseases and patients should be aware of its importance in families’ health with updating information in regular visiting. for more information on identifying the genetic pattern of diseases, in this article, we...