Genetica

, Volume 115, Issue 2, pp 223–232

Karyotypic Diversity in Polyploid Gibel Carp, Carassius Auratus Gibelio Bloch

  • L. Zhou
  • J.F. Gui
Article

DOI: 10.1023/A:1020102409270

Cite this article as:
Zhou, L. & Gui, J. Genetica (2002) 115: 223. doi:10.1023/A:1020102409270

Abstract

Polyploid gibel carp, Carassius auratus gibelio, is an excellent model system for evolutionary genetics owing to its specific genetic background and reproductive modes. Comparative karyotype studies were performed in three cultured clones, one artificially manipulated group, and one mated group between two clones. Both the clones A and P had 156 chromosomes in their karyotypes, with 36 metacentric, 54 submetacentric, 36 subtelocentric, 24 acrocentric, and six small chromosomes. The karyotype of clone D contained 162 chromosomes, with 42 metacentric, 54 submetacentric, 36 subtelocentric, 24 acrocentric, and six small chromosomes. All the three clones had six small chromosomes in common. Group G, being originated from the clone D by artificial manipulation, showed supernumerary microchromosomes or chromosomal fragments, in addition to the normal chromosome complement that was identical to the clone D. The offspring from mating between clones D and A had 159 chromosomes. Comparing with the clone A, the DA offspring showed three extra metacentric chromosomes. In addition, variable RAPD fingerprint patterns and unusual SCAR marker inheritance were, respectively, detected among individuals of artificial group G and in the mated DA offspring. Both the chromosome and molecular findings suggest that genome reshuffling might have occurred by manipulation or mating of the clones.

chromosome rearrangementdiploidizationgynogenesismicrochromosomereproductive mode

Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  • L. Zhou
    • 1
  • J.F. Gui
    • 1
  1. 1.State Key Laboratory of Freshwater Ecology and Biotechnology, Wuhan Center for Developmental Biology, Institute of HydrobiologyChinese Academy of SciencesWuhanChina