Thesis (PhD (Animal Sciences))--Stellenbosch University, 2011. / ENGLISH ABSTRACT: Local pigs in Southern Africa are an important component of resource-based subsistence
farming systems and contribute substantially to the improvement of livelihoods of farmers.
The objective of the study was to characterise indigenous pigs through the following specific
objectives: to characterise the production systems, to give a physical description and to
evaluate the genetic differentiation of the indigenous pigs. Surveys were carried out in
Chirumhanzu and Mutoko Districts of Zimbabwe, Afred Nzo, OR Tambo and Vhembe
districts of South Africa. Blood samples were collected in all of the above and additional
three districts in Malawi (Mchinji, Dedza and Salima). The first study showed that most of
the indigenous pigs were kept by women. The farmers kept small herd sizes (<7 pigs) to
match the available resources. Income was the main determinant of farmer production
objectives and breed preference. Several constraints that would militate against in situ
conservation included poor quality and quantity of feeds, diseases, lack of housing, lack of
markets and lack of support services. The pigs were generally small and black resembling the
Windsnyer-Mukota type of pigs. The pigs apparently had a high foraging ability and high
thermo-tolerance that made them suitable for production in low-intensity management free
range production systems. These types of pigs were distributed throughout the study area. A
microsatellite analysis showed high diversity but very little population differentiation among
the pig populations from Southern Africa, with 93 % of variety occurring within subpopulations.
Development of markets can be a feasible way of mainstreaming the indigenous
pigs into the general economy. This will achieve the twin objectives of conserving and
improving the breed while, at the same time, benefitting the farmers that keep these genetic
resources. Farmers faced similar production constraints and the pigs were similar across the
study areas. / AFRIKAANSE OPSOMMING: Plaaslike varke speel ‘n belangrike rol in hulpbron-gebaseerde bestaansboederye in Suider-
Afrika, en maak ‘n aansienlike bydrae tot verbetering van die lewensbestaan van
bestaansboere. Die studie het die volgende doelwitte: om die produksie van inheemse varke
te karakteriseer, die varke fisies te beskryf, en om die genetiese differensiasie van die
inheemse varke te evalueer. Opnames is uitgevoer in die Chirumhanzu en Mutoko distrikte
van Zimbabwe, Afred Nzo, OR Tambo en Vhembe distrikte in Suid-Afrika. Bloedmonsters is
in al die bogenoemde en nog drie distrikte in Malawi (Mchinji, Dedza en Salima) versamel.
Die eerste studie het getoon dat die meeste inheemse varke deur vroue aangehou word. Die
boere het klein trop groottes vir aanpasbaarheid by die beskikbare hulpbronne. Inkomste en
varkras voorkeur was die hoof bepalende faktore vir hierdie boere se produksie doelwitte.
Verskeie beperkings wat bots teen in situ instandhouding sluit in swak kwaliteit- en
kwantiteit voere, siektes, gebrek aan behuising, die gebrek aan markte en die gebrek aan
ondersteunende dienste. Die varke is oor die algemeen klein en swart en vertoon soos die
Windsnyer-Mukoto tipe varke. Hierdie varke het blykbaar ‘n hoë voer-soekende vermoë en
hitte-verdraagsaamheid wat hulle geskik maak vir die produksie in lae-intensiteit bestuur en
vry-weidende produksie sisteme. Hierdie tipe varke was versprei oor die studie area. ‘n
Mikrosatelliet analise het aangedui dat daar hoë genetiese variasie is binne die vark
populasie, maar daar is klein differensiasie tussen die verskillende vark populasies van
Suider-Afrika, met 93% variasie wat voorkom binne sub-populasies. Die ontwikkeling van
markte kan ‘n haalbare manier wees om die inheemse varke toegang te gee tot die algemene
ekonomie. Hiermee kan beide doelwitte, bewaring en verbetering van hierdie varkras,
tergelyktydig bereik word, ten goede van die boere wat hierdie genetiese hulpbronne aanhou.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/18108 |
| Date | 12 1900 |
| Creators | Halimani, T. E. |
| Contributors | Dzama, K., Stellenbosch University. Faculty of AgriSciences. Dept. of Animal Sciences. |
| Publisher | Stellenbosch : Stellenbosch University |
| Source Sets | South African National ETD Portal |
| Language | en_ZA |
| Detected Language | English |
| Type | Thesis |
| Format | xiii, 113 p. : ill. |
| Rights | Stellenbosch University |
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