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

Autor:	S C, Harvey, R, Campos-Ramos, D D, Kennedy, M T, Ezaz, N R, Bromage, D K, Griffin, D J, Penman
Rok vydání:	2002
Předmět:	Meiosis Ploidies Synaptonemal Complex Karyotyping Animals Mitosis Biological Evolution Chromosomes Tilapia
Zdroj:	Genetica. 115(2)
ISSN:	0016-6707
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=pmid________::69e0ef70f8c817ae6a76cbd6d05cf47c https://pubmed.ncbi.nlm.nih.gov/12403171 Zobrazit plný text záznamu Full text from SpringerLink