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Genetic and phenotypic characterisation of the South African Namaqua Afrikaner sheep breed
Dissertation (MSc(Agric))--University of Pretoria, 2011.
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University of Pretoria
2013
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| _version_ | 1867613650154422272 |
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| access_status_str | Open Access |
| author2 | Visser, Carina |
| author_browse | Visser, Carina |
| author_facet | Visser, Carina |
| collection | Thesis |
| dc_rights_str_mv | © 2011, 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. |
| description | Dissertation (MSc(Agric))--University of Pretoria, 2011. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/26651 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:39:30.899Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/26651 Genetic and phenotypic characterisation of the South African Namaqua Afrikaner sheep breed Visser, Carina Van Marle-Koster, Este Snyman, M.A. qwabes@arc.agric.za Qwabe, Sithembile Olga Namaqua afrikaner sheep Farm animal genetic resources UCTD Dissertation (MSc(Agric))--University of Pretoria, 2011. Genetic and phenotypic characterisation is essential for the conservation and utilisation of farm animal genetic resources, especially indigenous types that are often disregarded due to lower production potential compared to commercial breeds. In this study a genetic characterisation was performed on 144 Namaqua Afrikaner sheep kept at the Karakul Experimental Station (KES) and Carnarvon Experimental Station (CES) and a private farm Welgeluk (WGK) using 22 ISAG recommended microsatellite markers. Results of this study showed that the mean number of alleles were low (3.6 for KES to 4.2 for WGK) for the loci tested. Heterozygosity values across loci ranged between 46% for WGK, 48% for KES and 55% for CES, indicating low to moderate genetic variation within the different populations. The AMOVA analyses revealed that 89.5% of the genetic variation in the breed was due to the differences within populations and 10.5% due to differences between populations. The genetic distance estimates revealed a close relationship between the CES and WGK populations. The population structure confirmed the differentiation of three clusters with relationships between the CES and WGK populations. Phenotypic characterisation of the breed was limited to the Carnarvon flock, where production and morphological data were recorded. Morphological measurements indicated an average body length of 71.2 cm and 68.7 cm for rams and ewes respectively. Over 60% of the sheep had their tail twisted to the left. The molecular data provided by this study will serve as a reference for genetic management and breeding strategies of the indigenous Namaqua Afrikaner sheep. Copyright Animal and Wildlife Sciences unrestricted 2013-09-07T07:06:25Z 2012-08-03 2013-09-07T07:06:25Z 2012-04-24 2011 2012-07-25 Dissertation Qwabe, SO 2011, Genetic and phenotypic characterisation of the South African Namaqua Afrikaner sheep breed, MSc(Agric) dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/26651 > E12/4/503/gm http://hdl.handle.net/2263/26651 http://upetd.up.ac.za/thesis/available/etd-07252012-132647/ © 2011, 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. application/pdf University of Pretoria |
| spellingShingle | Namaqua afrikaner sheep Farm animal genetic resources UCTD Genetic and phenotypic characterisation of the South African Namaqua Afrikaner sheep breed |
| title | Genetic and phenotypic characterisation of the South African Namaqua Afrikaner sheep breed |
| title_full | Genetic and phenotypic characterisation of the South African Namaqua Afrikaner sheep breed |
| title_fullStr | Genetic and phenotypic characterisation of the South African Namaqua Afrikaner sheep breed |
| title_full_unstemmed | Genetic and phenotypic characterisation of the South African Namaqua Afrikaner sheep breed |
| title_short | Genetic and phenotypic characterisation of the South African Namaqua Afrikaner sheep breed |
| title_sort | genetic and phenotypic characterisation of the south african namaqua afrikaner sheep breed |
| topic | Namaqua afrikaner sheep Farm animal genetic resources UCTD |
| url | http://hdl.handle.net/2263/26651 http://upetd.up.ac.za/thesis/available/etd-07252012-132647/ |