Chromosome Research

, 15:499

Cross-species chromosome painting among camel, cattle, pig and human: further insights into the putative Cetartiodactyla ancestral karyotype

Authors

  • Gabriel Balmus
    • Cambridge Resource Centre for Comparative Genomics, Department of Veterinary Medicine
    • University of Agricultural Sciences and Veterinary Medicine–Iasi, Faculty of Veterinary Medicine
  • Vladimir A. Trifonov
    • Cambridge Resource Centre for Comparative Genomics, Department of Veterinary Medicine
    • Institute of Cytology and Genetics, Russian Academy of Sciences
  • Larisa S. Biltueva
    • Institute of Cytology and Genetics, Russian Academy of Sciences
  • Patricia C.M. O’Brien
    • Cambridge Resource Centre for Comparative Genomics, Department of Veterinary Medicine
  • Elena S. Alkalaeva
    • Institute of Cytology and Genetics, Russian Academy of Sciences
  • Beiyuan Fu
    • Cambridge Resource Centre for Comparative Genomics, Department of Veterinary Medicine
  • Julian A. Skidmore
    • Camel Reproduction Centre
  • Twink Allen
    • Department of Clinical Veterinary Medicine, Equine Fertility UnitUniversity of Cambridge
  • Alexander S. Graphodatsky
    • Institute of Cytology and Genetics, Russian Academy of Sciences
    • Cambridge Resource Centre for Comparative Genomics, Department of Veterinary Medicine
    • Wellcome Trust Sanger Institute
    • Cambridge Resource Centre for Comparative Genomics, Department of Veterinary Medicine
Article

DOI: 10.1007/s10577-007-1154-x

Cite this article as:
Balmus, G., Trifonov, V.A., Biltueva, L.S. et al. Chromosome Res (2007) 15: 499. doi:10.1007/s10577-007-1154-x

Abstract

The great karyotypic differences between camel, cattle and pig, three important domestic animals, have been a challenge for comparative cytogenetic studies based on conventional cytogenetic approaches. To construct a genome-wide comparative chromosome map among these artiodactyls, we made a set of chromosome painting probes from the dromedary camel (Camelus dromedarius) by flow sorting and degenerate oligonucleotide primed-PCR. The painting probes were first used to characterize the karyotypes of the dromedary camel (C. dromedarius), the Bactrian camel (C. bactrianus), the guanaco (Lama guanicoe), the alpaca (L. pacos) and dromedary × guanaco hybrid karyotypes (all with 2n = 74). These FISH experiments enabled the establishment of a high-resolution GTG-banded karyotype, together with chromosome nomenclature and idiogram for C. dromedarius, and revealed that these camelid species have almost identical karyotypes, with only slight variations in the amount and distribution patterns of heterochromatin. Further cross-species chromosome painting between camel, cattle, pig and human with painting probes from the camel and human led to the establishment of genome-wide comparative maps. Between human and camel, pig and camel, and cattle and camel 47, 53 and 53 autosomal conserved segments were detected, respectively. Integrated analysis with previously published comparative maps of human/pig/cattle enabled us to propose a Cetartiodactyla ancestral karyotype and to discuss the early karyotype evolution of Cetartiodactyla. Furthermore, these maps will facilitate the positional cloning of genes by aiding the cross-species transfer of mapping information.

Key words

camelCamelusCetartiodactylachromosome paintingcytogeneticsevolutionkaryotypeLama

Copyright information

© Springer 2007