The evolution and prevalence of reproductive assurance in the genus Lachenalia

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dc.contributor.advisorVerboom, Tonyen_ZA
dc.contributor.advisorRodger, Jamesen_ZA
dc.contributor.authorRink, Ariellaen_ZA
dc.date.accessioned2015-09-15T10:32:52Z
dc.date.available2015-09-15T10:32:52Z
dc.date.issued2013en_ZA
dc.description.abstractSince its proposal by Darwin (1876), the concept of reproductive assurance (RA) has been much discussed, modified and tested. It is hypothesized to occur under pollen- and/or mate-limitation, each of which can arise in a multitude of manners, and RA itself takes many forms. Here its evolution and prevalence in the genus Lachenalia (Asparagaceae) is investigated. The genus exhibits many of the characteristics suggested in the literature to be associated with reproductive assurance, including intraspecific polyploids, vegetative reproduction and self-compatibility. Of the 27 study species, 20 were found to be self-compatible and four were capable of autonomous self-pollination. Pollinator-dependent species were found to have more attractive floral display structures. The five species exhibiting intraspecific polyploidy were all self-compatible. Offset production, known to occur in many Lachenalia species, was thought to exhibit a negative association with self-compatibility. No significant association, however, was found. A deeper understanding of the patterns of reproductive assurance in the genus requires study of the mechanisms enforcing self-incompatibility, and of the ecological and physiological correlates of reproductive assurance, is needed.en_ZA
dc.identifier.apacitationRink, A. (2013). <i>The evolution and prevalence of reproductive assurance in the genus Lachenalia</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/14015en_ZA
dc.identifier.chicagocitationRink, Ariella. <i>"The evolution and prevalence of reproductive assurance in the genus Lachenalia."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 2013. http://hdl.handle.net/11427/14015en_ZA
dc.identifier.citationRink, A. 2013. The evolution and prevalence of reproductive assurance in the genus Lachenalia. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Rink, Ariella AB - Since its proposal by Darwin (1876), the concept of reproductive assurance (RA) has been much discussed, modified and tested. It is hypothesized to occur under pollen- and/or mate-limitation, each of which can arise in a multitude of manners, and RA itself takes many forms. Here its evolution and prevalence in the genus Lachenalia (Asparagaceae) is investigated. The genus exhibits many of the characteristics suggested in the literature to be associated with reproductive assurance, including intraspecific polyploids, vegetative reproduction and self-compatibility. Of the 27 study species, 20 were found to be self-compatible and four were capable of autonomous self-pollination. Pollinator-dependent species were found to have more attractive floral display structures. The five species exhibiting intraspecific polyploidy were all self-compatible. Offset production, known to occur in many Lachenalia species, was thought to exhibit a negative association with self-compatibility. No significant association, however, was found. A deeper understanding of the patterns of reproductive assurance in the genus requires study of the mechanisms enforcing self-incompatibility, and of the ecological and physiological correlates of reproductive assurance, is needed. DA - 2013 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2013 T1 - The evolution and prevalence of reproductive assurance in the genus Lachenalia TI - The evolution and prevalence of reproductive assurance in the genus Lachenalia UR - http://hdl.handle.net/11427/14015 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/14015
dc.identifier.vancouvercitationRink A. The evolution and prevalence of reproductive assurance in the genus Lachenalia. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 2013 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/14015en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Biological Sciencesen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherBiological Sciencesen_ZA
dc.titleThe evolution and prevalence of reproductive assurance in the genus Lachenaliaen_ZA
dc.typeBachelor Thesis
dc.type.qualificationlevelHonours
dc.type.qualificationnameBSc (Hons)en_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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