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Phenotypic and genetic characterization of South African Boran cattle
Dissertation (MSc (Agric))--University of Pretoria, 2018.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2019
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| _version_ | 1867613602206187520 |
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| access_status_str | Open Access |
| author2 | Van Marle-Koster, Este |
| author_browse | Van Marle-Koster, Este |
| author_facet | Van Marle-Koster, Este |
| collection | Thesis |
| dc_rights_str_mv | © 2019 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, 2018. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/70625 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:38:45.051Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| 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:2263/70625 Phenotypic and genetic characterization of South African Boran cattle Van Marle-Koster, Este marika@mettis.co.za Visser, Carina Lochner, Denis UCTD Boran cattle Genetic characterization Animal breeding Beef production Genetic diversity Livestock sustainability Natural and agricultural sciences theses SDG-02 Natural and agricultural sciences theses SDG-12 Natural and agricultural sciences theses SDG-15 Dissertation (MSc (Agric))--University of Pretoria, 2018. Boran cattle are classified as Zebu and have only been recognized as a breed in South Africa since 1995, with the establishment of the Boran Cattle Breeders’ Society of South Africa on 17 May 2003. Although Boran breeders have been participating in animal recording since 2003 and also joined the BGP (Bovine Genomics Project) in 2016, limited scientific research has been performed on the South African Boran. The aim of this study was to perform a phenotypic and genetic characterisation of the South African Boran based on available data to provide reference data for compiling breeding objectives and further genomic applications. The phenotypic data consisted of pedigree data from 1995 to 2016 and Estimated Breeding Values (EBVs) for seven different traits recorded over the same time period. Pedigree completeness varied from 22.6%, six generations ago with improvement, to 100% in generation one. Furthermore, complete recording for production traits was limited to seven years. This affected the accuracy of the EBVs and could result in incorrect prediction and potential adverse effects on genetic improvement. Maternal birth weight and maternal weaning weight decreased, while birth weight direct and weaning weight direct increased. Yearling weight and final weight increased as well. This indicates that the genetic trends for the previously mentioned production traits were positive except for mature weight. Birth weight remains low which is positive in order to prevent dystocia. Decreased maternal traits can cause cows not being able to raise a calf to weaning due to not sufficient milk produced. Both age at first calving and calving interval also increased over time, resulting in heifers giving birth later in life and longer periods between calving. The genotypic data indicated low inbreeding (-0.027) and revealed high heterozygosity (0.371) for the South African Boran population. Population structure revealed two dominant groups for the Boran. In comparison with other breeds (Bosnmara, Hereford), the Boran was confined as a separate cluster. The Boran breed contributes a well-adapted genetic resource for the beef industry in South Africa. Results confirmed that more attention to breeding objectives and animal recording is required to improve and ensure long-term sustainability. bs2026 Animal and Wildlife Sciences MSc (Agric) Unrestricted SDG-02: Zero hunger SDG-12: Responsible consumption and production SDG-15: Life on land 2019-07-08T09:47:04Z 2019-07-08T09:47:04Z 2019/04/17 2018 Dissertation Lochner, D 2018, Phenotypic and genetic characterization of South African Boran cattle, MSc (Agric) Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/70625> A2019 http://hdl.handle.net/2263/70625 en © 2019 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 | UCTD Boran cattle Genetic characterization Animal breeding Beef production Genetic diversity Livestock sustainability Natural and agricultural sciences theses SDG-02 Natural and agricultural sciences theses SDG-12 Natural and agricultural sciences theses SDG-15 Phenotypic and genetic characterization of South African Boran cattle |
| title | Phenotypic and genetic characterization of South African Boran cattle |
| title_full | Phenotypic and genetic characterization of South African Boran cattle |
| title_fullStr | Phenotypic and genetic characterization of South African Boran cattle |
| title_full_unstemmed | Phenotypic and genetic characterization of South African Boran cattle |
| title_short | Phenotypic and genetic characterization of South African Boran cattle |
| title_sort | phenotypic and genetic characterization of south african boran cattle |
| topic | UCTD Boran cattle Genetic characterization Animal breeding Beef production Genetic diversity Livestock sustainability Natural and agricultural sciences theses SDG-02 Natural and agricultural sciences theses SDG-12 Natural and agricultural sciences theses SDG-15 |
| url | http://hdl.handle.net/2263/70625 |