Variation in Thamnocortus insignis - genetically and environmentally plastic?

 

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dc.contributor.advisor Linder, H Peter en_ZA
dc.contributor.author Mgidi, Theresa Nobuhle en_ZA
dc.date.accessioned 2017-12-08T05:55:53Z
dc.date.available 2017-12-08T05:55:53Z
dc.date.issued 1999 en_ZA
dc.identifier.citation Mgidi, T. 1999. Variation in Thamnocortus insignis - genetically and environmentally plastic?. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/26493
dc.description.abstract Environmental variation of Thamnocortus insignis Mast. (Restionaceae) is presented, by using average dry weight measurements of six populations of this species found along the coast of the Cape Province. The dry weight measurements were used to detect variation in the growth rates of the six populations, which in tum indicates the environmental variation among the populations. The results were showed no significant difference between all six populations and this was due to the relatively very small sizes of the seedlings when the measurements were taken. Genetic variation was investigated by using isozyme electrophoresis of the EST locus. One population (Puntjie) showed significant deviation from the Hardy-Weinberg equilibrium, whilst all the others agreed with the assumptions of the model except for the Superthatch-extra tall population, which was homologous. Estimation of allelic diversity among the populations produced a Fst of 0.098 that implies that there is a high level of gene flow among the six populations of the species. The allelic diversity estimate within populations was also very low (Fis = 0.079) implying that the genetic neighbourhoods are relatively large and there is a high incidence of gene flow within the populations. Both estimation results support the predicted results for dioecious wind-pollinated species such as T. insignis. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Botany en_ZA
dc.subject.other Genetic variation en_ZA
dc.title Variation in Thamnocortus insignis - genetically and environmentally plastic? en_ZA
dc.type Bachelor Thesis
dc.date.updated 2017-02-03T13:14:15Z
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Department of Biological Sciences en_ZA
dc.type.qualificationlevel Honours
dc.type.qualificationname BSc (Hons) en_ZA
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uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Mgidi, T. N. (1999). <i>Variation in Thamnocortus insignis - genetically and environmentally plastic?</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/26493 en_ZA
dc.identifier.chicagocitation Mgidi, Theresa Nobuhle. <i>"Variation in Thamnocortus insignis - genetically and environmentally plastic?."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1999. http://hdl.handle.net/11427/26493 en_ZA
dc.identifier.vancouvercitation Mgidi TN. Variation in Thamnocortus insignis - genetically and environmentally plastic?. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1999 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/26493 en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Mgidi, Theresa Nobuhle AB - Environmental variation of Thamnocortus insignis Mast. (Restionaceae) is presented, by using average dry weight measurements of six populations of this species found along the coast of the Cape Province. The dry weight measurements were used to detect variation in the growth rates of the six populations, which in tum indicates the environmental variation among the populations. The results were showed no significant difference between all six populations and this was due to the relatively very small sizes of the seedlings when the measurements were taken. Genetic variation was investigated by using isozyme electrophoresis of the EST locus. One population (Puntjie) showed significant deviation from the Hardy-Weinberg equilibrium, whilst all the others agreed with the assumptions of the model except for the Superthatch-extra tall population, which was homologous. Estimation of allelic diversity among the populations produced a Fst of 0.098 that implies that there is a high level of gene flow among the six populations of the species. The allelic diversity estimate within populations was also very low (Fis = 0.079) implying that the genetic neighbourhoods are relatively large and there is a high incidence of gene flow within the populations. Both estimation results support the predicted results for dioecious wind-pollinated species such as T. insignis. DA - 1999 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1999 T1 - Variation in Thamnocortus insignis - genetically and environmentally plastic? TI - Variation in Thamnocortus insignis - genetically and environmentally plastic? UR - http://hdl.handle.net/11427/26493 ER - en_ZA


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