Document Detail


Chromosomal evolution in duiker antelope (Cephalophinae: Bovidae): karyotype comparisons, fluorescence in situ hybridization, and rampant X chromosome variation.
MedLine Citation:
PMID:  8646878     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Fluorescence in situ hybridization (FISH) and conventional banding techniques were used to identify patterns of similarity among the genomes of six species of antelope, subfamily Cephalophinae. The G-banded euchromatic portions of the autosomes were invariable in all species; however, significant modifications of the X chromosomes were detected. Two of the taxa, Cephalophus maxwellii and C. monticola, were characterized by acrocentric X's, while X chromosome morphology varied from submetacentric to metacentric in the remaining species (C. dorsalis, C. natalensis, Sylvicapra grimmia, and C. silvicultor). The short arm of the X was heterochromatic in each species. Total genomic DNAs from these antelope were used as hybridization probes against Cephalophus metaphase chromosomes and resulted in robust fluorescence in the pericentromeric region of each autosome and in the heterochromatic short arm of the X chromosome, indicating complimentarity of DNA sequences in these regions. Conversely, chromosome painting involving genomic DNAs derived from the subfamilies Alcelaphinae (Pygargus dorcas) and Neotraginae (Oreotragus oreotragus) showed a marked absence of hybridization at these sites. Additionally, X chromosome comparisons between the Cephalophinae and Bovinae (represented by Bos taurus) revealed two euchromatic pericentric inversions which had occurred since their common ancestry. There is good G-band homoeology between the inverted cattle chromosome region Xq12 --> q34 and most of the proximal portion of Xq in duikers, as well as between the distal third of the duiker Xq and the cattle Xp. The latter rearrangement was further confirmed by in situ hybridization using a probe containing an insert spanning bands p12 to p14 of the cattle X chromosome.
Authors:
T J Robinson; V Wilson; D S Gallagher; J F Taylor; S K Davis; W R Harrison; F F Elder
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Cytogenetics and cell genetics     Volume:  73     ISSN:  0301-0171     ISO Abbreviation:  Cytogenet. Cell Genet.     Publication Date:  1996  
Date Detail:
Created Date:  1996-07-22     Completed Date:  1996-07-22     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0367735     Medline TA:  Cytogenet Cell Genet     Country:  SWITZERLAND    
Other Details:
Languages:  eng     Pagination:  116-22     Citation Subset:  IM    
Affiliation:
Department of Zoology and Entomology, University of Pretoria, South Africa.
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MeSH Terms
Descriptor/Qualifier:
Animals
Antelopes / classification,  genetics*
Cattle / genetics
Cells, Cultured
Chromosome Banding / veterinary
Evolution, Molecular*
Female
Fibroblasts / ultrastructure
Genome
In Situ Hybridization, Fluorescence / veterinary
Karyotyping / veterinary
Male
Species Specificity
X Chromosome* / genetics,  ultrastructure

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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