Karyotype evolution in Tilapia: mitotic and meiotic chromosome analysis of Oreochromis karongae and O. niloticus x O. karongae hybrids

Harvey, S.C. and Campos-Ramos, R. and Kennedy, D.D. and Ezaz, M.T. and Bromage, N.R. and Griffin, D.K. and Penman, D.J. (2002) Karyotype evolution in Tilapia: mitotic and meiotic chromosome analysis of Oreochromis karongae and O. niloticus x O. karongae hybrids. Genetica, 115 (2). pp. 169-177. ISSN 0016-6707. (The full text of this publication is not available from this repository)

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Abstract

The karyotype of Oreochromis species is considered to be highly conserved, with a diploid chromosome complement of 2n = 44. Here we show, by analysis of mitotic and meiotic chromosomes, that the karyotype of O. karongae, one of the Lake Malawi 'chambo' species, is 2n = 38. This difference in chromosome number does not prevent the production of inter-specific hybrids between O. niloticus (2n = 44) and O. karongae (2n = 38). Analysis of the meiotic chromosomes of the O. niloticus x O. karongae hybrids indicates that three separate chromosome fusion events have occurred in O. karongae. Comparison of the O. karongae and O. niloticus karyotypes suggests that these consist of one Robertsonian fusion and two fusions of a more complex nature.

Item Type: Article
Additional information: 12403171 0016-6707
Uncontrolled keywords: Animals Chromosomes Evolution Karyotyping Meiosis Mitosis Ploidies Synaptonemal Complex Tilapia
Subjects: Q Science
Divisions: Faculties > Science Technology and Medical Studies > School of Biosciences
Depositing User: Darren Griffin
Date Deposited: 24 Sep 2008 12:34
Last Modified: 03 Mar 2009 11:51
Resource URI: http://kar.kent.ac.uk/id/eprint/12470 (The current URI for this page, for reference purposes)
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