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Genetic trends in the Dohne merino
Thesis (M. Sc. Agric.) -- University of Stellenbosch, 1990.
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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Stellenbosch : Stellenbosch University
2012
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| _version_ | 1867613750171795456 |
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| access_status_str | Open Access |
| author | De Klerk, Howard Craig |
| author2 | Heydenrych, H. J. |
| author_browse | De Klerk, Howard Craig Heydenrych, H. J. |
| author_facet | Heydenrych, H. J. De Klerk, Howard Craig |
| author_sort | De Klerk, Howard Craig |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (M. Sc. Agric.) -- University of Stellenbosch, 1990. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/67284 |
| institution | Stellenbosch University (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:41:06.301Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/67284 Genetic trends in the Dohne merino De Klerk, Howard Craig Heydenrych, H. J. Stellenbosch University. Faculty of AgriSciences. Dept. of Animal Science. Merino sheep -- Genetics Sheep -- Breeding -- South Africa Dissertations -- Agriculture Thesis (M. Sc. Agric.) -- University of Stellenbosch, 1990. Sheep data from the Dohne Merino stud and control flocks at Dohne were used to determine the genetic development of economic import traits. This mutton-woolled breed was developed locally for the sour grassveld areas. The BLUP single trait animal model, which includes the individual's own, as well as all relatives' records, was used to describe the genetic trends in greasy fleece mass and body mass traits. The entire development period, since the inception of the breed, as well as three distinct phases of development, were analysed. Genetic progress was slow but obvious differences in the response gradients occurred in the three development phases. Within phases these different traits reacted similarly. No measurable trends were observed in the control flock. The number of iterations required to determine genetic trend and accurately rank animals was also investigated. Adequate ranking of animals for selection purposes was achieved at a fraction of the number of iterations required to give a representative picture of the genetic trend. Masters 2012-08-27T12:09:46Z 2012-08-27T12:09:46Z 1990 Thesis http://hdl.handle.net/10019.1/67284 en Stellenbosch University 76 Pages : ill. application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Merino sheep -- Genetics Sheep -- Breeding -- South Africa Dissertations -- Agriculture De Klerk, Howard Craig Genetic trends in the Dohne merino |
| title | Genetic trends in the Dohne merino |
| title_full | Genetic trends in the Dohne merino |
| title_fullStr | Genetic trends in the Dohne merino |
| title_full_unstemmed | Genetic trends in the Dohne merino |
| title_short | Genetic trends in the Dohne merino |
| title_sort | genetic trends in the dohne merino |
| topic | Merino sheep -- Genetics Sheep -- Breeding -- South Africa Dissertations -- Agriculture |
| url | http://hdl.handle.net/10019.1/67284 |
| work_keys_str_mv | AT deklerkhowardcraig genetictrendsinthedohnemerino |