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The evolution of reproductive systems and sex-determining mechanisms within rumex (polygonaceae) inferred from nuclear and chloroplastidial sequence data.
TLDR
The results support the contention that sex determination based on the balance between the number of X chromosomes and theNumber of autosomes (X/A balance) has evolved secondarily from male-determining Y mechanisms and that multiple sex-chromosome systems were derived twice from an XX/XY system. Expand
Evolution of ancient satellite DNAs in sturgeon genomes.
TLDR
It is found that, in contrast to the situation in most other living beings, a high degree of preservation, a slow sequence change rate and slowed concerted evolution, appears to be a general rule for sturgeon satellite DNAs. Expand
Molecular characterization of the ribosomal RNA gene region of Perkinsus atlanticus: its use in phylogenetic analysis and as a target for a molecular diagnosis
TLDR
Investigation of the organization and the structural features of the nuclear ribosomal genes of Perkinsus atlanticus as well as the use of DNA sequence information from this region for phylogenetic analyses find additional support for the hypothesis that Perkinsus is more closely related to species of Dinoflagellata than tospecies of Apicomplexa. Expand
Two new species of the carnivorous genusPinguicula, (Lentibulariaceae) from Mediterranean habitats
TLDR
Two species ofPinguicula (P. submediterranea andP. mundi) are newly described from the south and east of the Iberian Peninsula and are threatened with extinction because suitable habitats are diminishing in size, or even disappearing, due to current aridity in the region. Expand
A satellite DNA of the Sparidae family (Pisces, Perciformes) associated with telomeric sequences
TLDR
This paper reports on the isolation and localization of the subtelomeric DraI satellite DNA in the Sparidae family and demonstrates that the ends of fish chromosomes have a structure similar to those of most eukaryote chromosomes, viz., telomere sequences and subtelomers associated by a boundary in which both types of sequences are interspersed. Expand
The EcoRI centromeric satellite DNA of the Sparidae family (Pisces, Perciformes) contains a sequence motive common to other vertebrate centromeric satellite DNAs.
TLDR
It is determined that the EcoRI satellite DNA family is conserved in the 10 sparid species analyzed here and its conservation, its chromosomal location at the centromere of each chromosome, and its structural features could make this satelliteDNA family an important structural and/or functional element of the centromeres of these species. Expand
A heterochromatic satellite DNA is highly amplified in a single chromosome of Muscari (Hyacinthaceae)
TLDR
The characteristics of this satellite DNA family, which, being exclusively amplified in one chromosome pair of M. comosum, constitute the major exception to the equilocal model of satellite DNA and heterochromatin distribution, are discussed. Expand
The B chromosome system of Scilla autumnalis (Liliaceae): effects at the isozyme level
TLDR
The role that the Bs may have played in the appearance of this new locus (Est-1) is discussed in relation to their possible origin and analysis of esterase isozyme patterns shows that all 130 individuals with a standard karyotype have two ester enzyme loci, Est-2 and Est-3, whereas all 10 individuals with Bs have three. Expand
Genetic Identification of Western Mediterranean Sturgeons and its Implication for Conservation
TLDR
This study demonstrates that A. naccarii coexists with A. sturio, from the Adriatic Sea to the Iberian Peninsula, a finding that could be taken into account in future sturgeon recovery programmes in Western Europe. Expand
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