scholarly journals A comparative study on nucleolus organizer regions (NORs) in 7 Rattus species with special emphasis on the organizer differentiation and species evolution.

1979 ◽  
Vol 55 (10) ◽  
pp. 481-486 ◽  
Author(s):  
Tosihide H. YOSIDA
Keyword(s):  
Comparative Study ◽  
Nucleolus Organizer ◽  
Nucleolus Organizer Regions ◽  
Species Evolution

Variable conservation of nucleolus organizer regions during karyotypic evolution in Microtidae

Genome ◽  
1990 ◽  
Vol 33 (1) ◽  
pp. 119-122 ◽  
Author(s):  
A. Sánchez ◽  
M. Burgos ◽  
R. Jiménez ◽  
R. Díaz de la Guardia
Keyword(s):  
Comparative Study ◽  
Nucleolus Organizer ◽  
Chromosome Rearrangements ◽  
Karyotypic Evolution ◽  
Nucleolus Organizer Regions ◽  
The Comparative Study

The location of the nucleolus organizer regions (NORs) was studied in four species of Microtidae (Microtus nivalis, M. cabrerae, M. arvalis, and Arvicola sapidus). The comparative study of these locations shows that some NORs have been conserved despite the chromosome rearrangements that have occurred through karyotypic evolution, while others have been lost. In addition, there are many chromosomes in which NORs seem to have appeared or been lost without apparent relation to the chromosome rearrangements. Some hypotheses regarding these facts are discussed in the text.Key words: nucleolus organizer regions, Microtidae, karyotypic evolution.

Polymorphism of interphase nucleolus organizer regions in imported pigs and their offspring

2014 ◽  
Vol 40 (3) ◽  
pp. 211-213
Author(s):  
S. K. Buteeva ◽  
M. L. Kochneva ◽  
K. V. Zhuchaev ◽  
S. V. Papshev
Keyword(s):  
Nucleolus Organizer ◽  
Nucleolus Organizer Regions

Age-related influence of piracetam on mitotic index and number of silver-stained nucleolus organizer regions

1992 ◽  
Vol 14 (2) ◽  
pp. 213-220 ◽  
Author(s):  
Walter Vormittag ◽  
Christian Ensinger ◽  
Leo Lesnjakovic ◽  
Scheiber Viktor
Keyword(s):  
Mitotic Index ◽  
Nucleolus Organizer ◽  
Nucleolus Organizer Regions ◽  
Age Related

Population differences in the expression of nucleolus organizer regions in the grasshopperEyprepocnemis plorans

PROTOPLASMA ◽  
2001 ◽  
Vol 217 (4) ◽  
pp. 185-190 ◽  
Author(s):  
M. Bakkali ◽  
J. Cabrero ◽  
M. D. L�pez-Le�n ◽  
F. Perfectti ◽  
J. P. M. Camacho
Keyword(s):  
Nucleolus Organizer ◽  
Population Differences ◽  
Nucleolus Organizer Regions
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