scholarly journals Longitudinal differentiation among pelagic populations in a planktic foraminifer

2012 ◽  
Vol 2 (7) ◽  
pp. 1725-1737 ◽  
Author(s):  
Yurika Ujiié ◽  
Takahiro Asami ◽  
Thibault de Garidel-Thoron ◽  
Hui Liu ◽  
Yoshiyuki Ishitani ◽  
...  
Keyword(s):  
Longitudinal Differentiation

scholarly journals Longitudinal differentiation in Melipona mandacaia (Hymenoptera, Meliponini) chromosomes

Hereditas ◽  
2003 ◽  
Vol 138 (2) ◽  
pp. 133-137 ◽  
Author(s):  
M. P. ROCHA ◽  
M. P. CRUZ ◽  
A. FERNANDES ◽  
A. M. WALDSCHMIDT ◽  
J. C. SILVA-JUNIOR ◽  
...  
Keyword(s):  
Longitudinal Differentiation

In situ nick translation of meiotic chromosomes to demonstrate homologous heterochromatin heterogeneity

Genome ◽  
1993 ◽  
Vol 36 (2) ◽  
pp. 268-270 ◽  
Author(s):  
J. de la Torre ◽  
C. López-Fernández ◽  
P. Herrero ◽  
J. Gosálvez
Keyword(s):  
Tandem Duplication ◽  
Dna Recombination ◽  
Nick Translation ◽  
Meiotic Chromosomes ◽  
In Situ Nick Translation ◽  
Living Species ◽  
Longitudinal Differentiation ◽  
Translation Procedure ◽  
Restriction Endonuclease Cleavage

The in situ nick translation procedure performed on fixed meiotic chromosomes partially cleaved with restriction endonucleases shows a different staining of homologous heterochromatic regions, which could be explained through a differential restriction endonuclease cleavage. Mutations occurring before massive tandem duplication and involving those DNA motifs that produce these heterochromatic blocks, together with the absence of DNA recombination that characterizes these particular regions, could explain the observed results. This method for chromosome labelling is most useful to demonstrate a certain level of heterochromatin heterogeneity that is present in the genome of living species but remained cryptic to other techniques that are also able to induce longitudinal differentiation of the chromosomes.Key words: cytogenetics, nick translation, meiosis, heterochromatin.

Longitudinal differentiation in chromosomes of some Sesbania Scop, species (Fabaceae)

Caryologia ◽  
1999 ◽  
Vol 52 (1-2) ◽  
pp. 97-103 ◽  
Author(s):  
Eliana Regina Forni-Martins ◽  
Marcelo Guerra
Keyword(s):  
Longitudinal Differentiation

scholarly journals Selective digestion of human metaphase chromosomes by Alu I restriction endonuclease.

1983 ◽  
Vol 31 (4) ◽  
pp. 553-556 ◽  
Author(s):  
R Mezzanotte ◽  
L Ferrucci ◽  
R Vanni ◽  
U Bianchi
Keyword(s):  
Acridine Orange ◽  
Restriction Endonuclease ◽  
Metaphase Chromosomes ◽  
Clear Cut ◽  
Longitudinal Differentiation

Human cytological preparations have been digested with Alu I restriction endonuclease (Endo R Alu I) and subsequently stained with acridine orange. Metaphase chromosomes treated in this way revealed a clear-cut bright/ dull longitudinal differentiation. It has been postulated that these cytological findings could be related to the selective digestion, by Alu I, of all DNA with the exception of some heterochromatic, possibly satellite, fractions.

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