Comparative genetics of selected Southern African Mountain zebra (Equus zebra zebra and Equus zebra hartmannae) populations

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dc.contributor.advisor Harper, Cindy Kim en
dc.contributor.advisor Bertschinger, H.J. (Hendrik Jan) en
dc.contributor.advisor Guthrie, Alan John en
dc.contributor.postgraduate Sasidharan, S P en
dc.date.accessioned 2013-09-07T00:38:01Z
dc.date.available 2005-06-24 en
dc.date.available 2013-09-07T00:38:01Z
dc.date.created 2004-12-02 en
dc.date.issued 2006-06-24 en
dc.date.submitted 2005-06-24 en
dc.description Dissertation (MSc (Production Animal Studies))--University of Pretoria, 2006. en
dc.description.abstract In recent years, South African conservation officials have noted the appearance of tumour like growths, very similar to equine sarcoids, in some Cape mountain zebra (CMZ) populations. In domestic horses, a genetic predisposition for this bovine papillomavirus-induced tumour is suspected. This investigation studied the levels of heterozygosity and population parameters such as inbreeding, within the tumour-affected populations. In comparison, CMZ populations with few or no tumours and Hartmann’s mountain zebras (HMZ) from Namibia were analysed using similar techniques. This study utilised dinucleotide repeat genetic markers called microsatellites, originally isolated from domestic horse (Equus caballus), to amplify related segments in the mountain zebras. Sixteen such fluorescent-labelled markers were amplified using polymerase chain reactions run in multiplexes. A commercial genetic analyser was used to detect the amplified markers and resulting data was analysed using STRand software. Marker visualisation and genotyping was completed using specialised open-source software. Fifteen loci were repeatedly amplified with clarity within both mountain zebra subspecies. The lowest heterozygosity and allele polymorphism levels were detected in sarcoid-tumour affected populations. All CMZ populations analysed were highly related and substructured. By comparison, Hartmann’s zebras were found to have highest levels of genetic diversity and polymorphism. The highest levels of inbreeding were found within the tumour-affected populations. High levels of heterozygote deficit found in CMZ populations, for the loci investigated, resulted in nonsignificant results when inbreeding values were analysed. This study indicates that the sarcoid tumour has been expressed in populations with the highest levels of consanguinity. The sarcoid tumour is a disease that is considered mutifactorial in aetiology and therefore other parameters such as immune status of tumour-affected populations and associated environmental variables warrant investigation. This study has simplified the archival and genotyping of individual mountain zebras. The study concludes that, among the populations tested, sarcoid tumours have been expressed in CMZ with highest levels of inbreeding. The establishment of a genetic database, incorporating information from polymorphic microsatellite markers, would assist in the conservation management of isolated CMZ populations by providing the information necessary to increase allelic diversity. en
dc.description.availability unrestricted en
dc.description.department Production Animal Studies en
dc.identifier.citation Sasidharan, S 2004, Comparative genetics of selected Southern African Mountain Zebra (Equus zebra zebra and Equus zebra hartmannae) populations, MSc dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/25785 > en
dc.identifier.upetdurl http://upetd.up.ac.za/thesis/available/etd-06242005-135216/ en
dc.identifier.uri http://hdl.handle.net/2263/25785
dc.language.iso en
dc.publisher University of Pretoria en_ZA
dc.rights © 2004, University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. en
dc.subject No key words available en
dc.subject UCTD en_US
dc.title Comparative genetics of selected Southern African Mountain zebra (Equus zebra zebra and Equus zebra hartmannae) populations en
dc.type Dissertation en


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