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Telomeric sequences localization and G-banding patterns in the identification of a polymorphic chromosomal rearrangement in the rodent Akodon cursor (2n=14,15 and 16).

Authors :
Fagundes V
Vianna-Morgante AM
Yonenaga-Yassuda Y
Source :
Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology [Chromosome Res] 1997 Jun; Vol. 5 (4), pp. 228-32.
Publication Year :
1997

Abstract

Akodon cursor is an exceptional example of high chromosomal variability, displaying diploid numbers from 14 to 16 and fundamental numbers (FN) from 18 to 26 as the result of a complex rearrangement in par 1 and pericentric inversions in three autosomal pairs. The difference in the diploid number is due to the presence of a large metacentric pair 1 in the 2n=14 karyotype, a large metacentric 1 and two different submetacentrics (1a and 1b) in 2n=15 and 1a and 1b submetacentric pairs in homozygosis in the 2n = 16 karyotype. Chromosomes 1a and 1b share homology with the short and long arms of the large metacentric 1 respectively. In this paper, evidence based on fluorescence in situ hybridization (FISH) with telomeric sequences and G-banding indicates that pericentric inversions and fusion of chromosomes 1a and 1b are the probable rearrangements giving rise to the large metacentric 1.

Details

Language :
English
ISSN :
0967-3849
Volume :
5
Issue :
4
Database :
MEDLINE
Journal :
Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology
Publication Type :
Academic Journal
Accession number :
9244449
Full Text :
https://doi.org/10.1023/a:1018463401887