Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/10036
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Spontaneous diploidization of the maternal chromosome set in Nile tilapia (Oreochromis niloticus L.) eggs
Authors: Ezaz, M Tariq
McAndrew, Brendan
Penman, David
Contact Email: b.j.mcandrew@stir.ac.uk
Keywords: gynogenesis
diploidization
Nile tilapia
Oreochromis niloticus
Issue Date: 26-Feb-2004
Publisher: Wiley-Blackwell
Citation: Ezaz MT, McAndrew B & Penman D (2004) Spontaneous diploidization of the maternal chromosome set in Nile tilapia (Oreochromis niloticus L.) eggs, Aquaculture Research, 35 (3), pp. 271-277.
Abstract: Spontaneous diploidization of the maternal chromosome set (SDM) in Oreochromis niloticus is described here for the first time. The SDM phenomenon was observed in progeny of only one XY neofemale out of 11 such neofemales from which eggs had been fertilized with UV-irradiated sperm: this treatment produced only the expected haploid embryos from the other females. SDM progeny were produced from three different batches of eggs from this female. No significant differences in survival at different stages of embryonic development were observed between the SDM and the diploid control group. The maternal inheritance of SDM progeny was verified using multilocus DNA fingerprinting. Only diploid karyotypes were observed in these fish and diploid control groups. In both the SDM and control groups, sex ratios were significantly skewed towards males (93.3% and 65.0% males respectively). The actual mechanism of SDM in eggs from this particular female remains unknown.
Type: Journal Article
URI: http://hdl.handle.net/1893/10036
DOI Link: http://dx.doi.org/10.1111/j.1365-2109.2004.01010.x
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Affiliation: University of Stirling
Aquaculture
Aquaculture

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