Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Genetic variation of Kappa-casein in South African goats
Dissertation (MSc(Agric))--University of Pretoria, 2009.
Saved in:
| Other Authors: | |
|---|---|
| Format: | Thesis |
| Published: |
University of Pretoria
2013
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613729510653952 |
|---|---|
| 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 | © 2009, 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, 2009. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/28891 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:40:46.593Z |
| 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:2263/28891 Genetic variation of Kappa-casein in South African goats Van Marle-Koster, Este Visser, Carina upetd@up.ac.za Scheepers, Robyn Clair Milk quantity South african goats Kappa-casein UCTD Dissertation (MSc(Agric))--University of Pretoria, 2009. Milk protein polymorphisms have a significant influence on milk quantity and composition. Kappa-casein is of special interest due to its known relationship with milk quality. In goats, a number of allelic variants have been identified, primarily classified into two groups. Group BIEF alleles (D, E, K, and M) have been shown to have a positive effect on milk yield and technological properties, while group AIEF, the remaining alleles, have a less positive influence on milk composition. The aim of this study was to investigate genetic variation in the kappa-casein genotype of South African goats. PCR-RFLP and DNA sequencing were performed on 68 and 77 samples, respectively. In addition, 84 milk samples were analyzed for milk composition. RFLP analysis revealed that the A and/or B alleles were the most frequent in the populations studied. A frequency of 0.00 was observed for the BIEF variants using DNA sequencing. In all goat types included, the B allele was the most common, with frequencies ranging from 60% in SA Boer goats to 100% in Saanens. The B’ allele had lower frequencies of 0.357 and 0.207 in SA Boer goats and local goat types, respectively. The H allele was present at low frequencies in local goat types (10.3%) and in SA Boer goats (3.6%), but was absent in Saanens. AMOVA results indicated that most of the total variation occurred within populations (80.66%) with the remainder of the variation (FST = 0.1934; p < 0.01) occurring due to genetic differences between populations. Animal and Wildlife Sciences unrestricted 2013-09-07T14:26:07Z 2009-11-03 2013-09-07T14:26:07Z 2009-10-21 2009 2009-10-21 Dissertation Scheepers, RC 2009, Genetic variation of Kappa-casein in South African goats, MSc(Agric) dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/28891 > E1524/gm http://hdl.handle.net/2263/28891 http://upetd.up.ac.za/thesis/available/etd-10212009-143858/ © 2009, 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 | Milk quantity South african goats Kappa-casein UCTD Genetic variation of Kappa-casein in South African goats |
| title | Genetic variation of Kappa-casein in South African goats |
| title_full | Genetic variation of Kappa-casein in South African goats |
| title_fullStr | Genetic variation of Kappa-casein in South African goats |
| title_full_unstemmed | Genetic variation of Kappa-casein in South African goats |
| title_short | Genetic variation of Kappa-casein in South African goats |
| title_sort | genetic variation of kappa casein in south african goats |
| topic | Milk quantity South african goats Kappa-casein UCTD |
| url | http://hdl.handle.net/2263/28891 http://upetd.up.ac.za/thesis/available/etd-10212009-143858/ |