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Forthcoming papers in Chromosome Research
ISSN: 0967-3849 (print version) ISSN: 1573-6849 (electronic version) Online version available Most recent entries: 26 JAN 2010 |
The most recent entries @ 26 JAN 2010
1. Mammalian X chromosome
A unique late-replicating XY to autosome translocation in Peromyscus melanophrys.
By Elisabeth E. Mlynarski. Storrs CT, Columbia SC USA
Peromyscus melanophrys has an XY sex chromosome system. However, the X and Y chromosome derived repeated DNA has been translocated to chromosome 1 and has retained its late replicating, heterochromatic state, although it has lost the signature of unichromosomal, closed chromatin that normally characterizes the inactive X of female mammals.
2. Mouse cytogenetics
New insights into the karyotypic evolution in muroid rodents revealed by multicolor banding applying murine probe.
By Vladimir Trifonov et al., Novosibirsk Russia, Florence Italy, Jena Germany.
Cross species comparative multicolour banding with probes from mouse chromosomes 3, 6, 18 and 19 used to study the karyotypes of nine muroid species from the three subfamilies. Evidence of new breakpoints, inversions and centromere positions and significant improvement of interspecies homology maps, leading to new insights into karyotypic evolution.
3. Drosophila genomics
FISH mapping of microsatellite loci from Drosophila subobscura and its comparison to related species.
Josiane Santos et al., Barcelona Spain, Lisbon Portugal.
Reporting the localization by FISH to polytene chromosomes of 72 microsatellites from a subobscura DNA library. Analysis of microsatellite loci distribution and density, comparing sex chromosomes and autosomes. A search in silico of the complete genomes of D. melanogaster and D. pseudoobscura for D. subobscura microsatellite loci to assess conservation and synteny.
4. Peanut genomics
FIDEL – a retrovirus-like retrotransposon and its distinct evolutionary histories in the A- and B-genome components of cultivated peanut.
Stephan Nielen et al., Brasila Brazil, Corrientes Argentina, Rockville MD USA.
Reporting the isolation and characterization of a new Athila-like Fairly long Inter Dispersed Euchromatic LTR retrotransposon in Arachis (FIDEL). Including a detailed characterization of that element and a discussion of its possible role in the evolution of the component A- and B-genomes of cultivated peanut and its wild diploid ancestors.
5. Legume genomics
Integration of cytogenetic and genetic linkage maps of Lotus japonicus, a model plant for legumes.
By Nobuko Ohmido et al., Kobe, Yamanashi, Kisarazu and Suita, Japan.
FISH and chromosome image analysis system ver. 3 (CHIAS3) applied for high-resolution banding of pachytene chromosomes to determine the precise relationships between the genetic and physical distances in the L. japonicus genome. Pachytene chromosome maps of the six L. japonicus chromosomes based on length, centromere position, heterochromatin, and euchromatin distribution.
6. Retrotransposons in Beet
The Ty1-copia families SALIRE and Cotzilla populating the Beta vulgaris genome show remarkable differences in abundance, chromosomal distribution and age.
By Beatrice Weber et al., Dresden Germany.
A description of members of two Ty1-copia-like LTR retrotronsposon families of the B. vulgaris genome designated SALIRE and Cotzilla. The former resemble conventional retrotransposons, while the latter belong to the Sirevirus lineage. The chromosomal localization of both retrotransposons and an assessment of their abundance, diversity and age in the genome.
7. Centromere proteins
Centromere targeting of alien CENH3s in Arabidopsis and tobacco cells.
By Kiyotaka Nagaki et al., Kurashiki, Japan.
CENH3 of Arabidopsis, but not those from rice or Luzula, are localized on centromeres in the tobacco cells. CENH3 of Luzula is partially localized in the Arabidopsis cells, suggesting that only evolutionarily close CENH3s are able to target centromeres in alien species. Interesting comparisons between localized and diffuse centromere situations.
8. Insertional mutagenesis
Integration of Exogenous DNA into Mouse Embryonic Stem Cell Chromosomes Shows Preference into Genes and Frequent Modification at Junctions.
By Keiichiro Suzuki et al., Saitama and Tokyo, Japan
The largest study, to date, characterizing integrations of non-viral exogenous DNA in non-transformed cells. The study may provide critical information for manipulating mammalian genomes for biological studies and practical applications and for evaluating the safety of insertional mutagenesis with DNA vectors, both viral and non-viral, as a gene therapy approach.
