Genomic relationships between Artemia franciscana and A. persimilis, inferred from chromocentre numbers

Article Abstract:

Chromocenter numbers in samples of Artemia franciscana from North, Central and South America, and samples of A. persimilis from Argentina are compared. Chromocenters, a good marker for speciation in Artemia, are highly stainable heterochromatic areas with highly repetitive DNA seen in resting nuclei. A probably hybrid zone between the two species was detected in Chilean Patagonia. A. persimilis showed low average chromocenter numbers vs those of A. franciscana and is like the ancestral Mediterranean species in this respect.

Chile, Belgium, Central America, North America, South America, Wales, Physiological aspects, Environmental aspects, Chromatin, Genomes, Patagonia, Artemia, Brine shrimps

The molecular phylogeny of the Sparidae (Pisces: Perciformes) based on two satellite DNA families

Article Abstract:

Molecular phylogeny of Sparidae fishes of the northeastern Atlantic and Mediterranean coasts has been investigated using two satellite DNA families. Six new species representative of the subfamilies Boopsinae and Denticinae were included. They had been very little analyzed before. The information found was used by the centromeric EcoR1 satellite DNA and by a new satellite DNA family, the subtelomeric Dral family.

Spain, Evolution (Biology), Evolution, Cytogenetics, Satellite DNA

Sequence variation in the mitochondrial DNA control region of wild African cheetahs (Acinonyx)

Article Abstract:

The two central repeat units in wild African cheetahs show homogenization that may have come from convergent evolution. Of the mitochondrial control region 525 bp were sequenced and analyzed for 20 Acinonyx jubatus and one domestic cat. The sequences were compared with published sequences from another domestic cat, 20 ocelots and 11 margays.

Austria, Ireland, Biological diversity, Biodiversity, Mitochondrial DNA, Cheetahs