Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Phenotypic and genetic characterisation of the indigenous Tswana goat population in Botswana
Thesis (PhD)--University of Pretoria, 2018.
Saved in:
| Other Authors: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Published: |
University of Pretoria
2019
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613527457398784 |
|---|---|
| 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 | Thesis (PhD)--University of Pretoria, 2018. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/70426 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:37:34.018Z |
| 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:2263/70426 Phenotypic and genetic characterisation of the indigenous Tswana goat population in Botswana Van Marle-Koster, Este pmonau@bca.bw Visser, Carina Nsoso, S.J. Monau, Phetogo Ineeleng UCTD genomic diversity morphometric population size Botswana Single nucleotide polymorphism Breed diversity Natural and agricultural sciences theses SDG-02 Natural and agricultural sciences theses SDG-08 Natural and agricultural sciences theses SDG-15 Thesis (PhD)--University of Pretoria, 2018. The aim of this study was to characterize indigenous Tswana goats in four agro-ecological regions of Botswana i.e. Southern, Central, Northwest and Ghanzi. The following specific objectives were set; description of existing goat production systems in Botswana, phenotypic and genetic characterisation of Tswana goats and investigation of population structure of indigenous and commercial goats using the Goat50K SNP panel. A survey was conducted in four agro-ecological regions to collect data on Tswana goats in smallholder farming systems and phenotypic measurements were recorded for 123 goats that included body weight (BW), body length (BL), heart girth (HG), height at withers (HW) and tail length (TL). Qualitative traits such as coat colour, horns and beard were also recorded. About 80% of the farmers kept goats for financial purposes. Goats in the Northwest region had significantly (P<0.05) higher HG values in all age groups compared to other regions. Goats in the Central (71.83±1.18) and Northwest (69.17±2.04) regions had significantly longer BL compared to the ones in the Southern (64.25±2.50) region at >48 months. For genetic characterisation, hair samples from 48 phenotyped animals of Central region were collected and genotyped with Illumina Goat50K SNP chip. Genomic diversity was high (0.423±0.03) with low inbreeding (FIS) (0.009±0.05). Additional genotypes which included Boer (n=24), Kalahari Red (n = 24) and Swazi (n=48) were included in the analysis to get a broader regional perspective. Genetic diversity, measured as expected heterozygosity was 0.390±0.01, 0.398±0.01 and 0.387±0.02 for Boer, Kalahari Red and Swazi goats, respectively. Inbreeding coefficient ranged from 0.014±0.06 in Boer, 0.012±0.07 in Kalahari Red to 0.011 ± 0.06 in Swazi goats. The populations clustered according to geographical origin. Linkage disequilibrium (LD) for shorter intervals (0-10 kb) ranged from 0.44 to 0.56. Effective population size at 13th generation was approximately 87 for Boer, 93 for Kalahari Red, 180 for Swazi and 266 for Tswana goats. The results indicate potential improvement of Tswana goat through within breed selection and structured crossbreeding that will assist in food security and sustainable utilization. bs2026 Animal and Wildlife Sciences PhD Unrestricted SDG-02: Zero hunger SDG-08: Decent work and economic growth SDG-15: Life on land 2019-07-08T09:46:23Z 2019-07-08T09:46:23Z 19/04/17 2018 Thesis Monau, PI 2018, Phenotypic and genetic characterisation of the indigenous Tswana goat population in Botswana, PhD Thesis, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/70426> A2019 http://hdl.handle.net/2263/70426 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 genomic diversity morphometric population size Botswana Single nucleotide polymorphism Breed diversity Natural and agricultural sciences theses SDG-02 Natural and agricultural sciences theses SDG-08 Natural and agricultural sciences theses SDG-15 Phenotypic and genetic characterisation of the indigenous Tswana goat population in Botswana |
| title | Phenotypic and genetic characterisation of the indigenous Tswana goat population in Botswana |
| title_full | Phenotypic and genetic characterisation of the indigenous Tswana goat population in Botswana |
| title_fullStr | Phenotypic and genetic characterisation of the indigenous Tswana goat population in Botswana |
| title_full_unstemmed | Phenotypic and genetic characterisation of the indigenous Tswana goat population in Botswana |
| title_short | Phenotypic and genetic characterisation of the indigenous Tswana goat population in Botswana |
| title_sort | phenotypic and genetic characterisation of the indigenous tswana goat population in botswana |
| topic | UCTD genomic diversity morphometric population size Botswana Single nucleotide polymorphism Breed diversity Natural and agricultural sciences theses SDG-02 Natural and agricultural sciences theses SDG-08 Natural and agricultural sciences theses SDG-15 |
| url | http://hdl.handle.net/2263/70426 |