[{"key":"dc.contributor.author","value":"Ie, Bryan","language":null},{"key":"dc.date.accessioned","value":"2009-07-06T21:21:04Z","language":null},{"key":"dc.date.available","value":"2009-07-06T21:21:04Z","language":null},{"key":"dc.date.issued","value":"2000","language":null},{"key":"dc.identifier.uri","value":"http:\/\/hdl.handle.net\/2429\/10267","language":null},{"key":"dc.description.abstract","value":"Despite the keen interest in using native grass species for restoration purposes,\r\nlittle is known about their ecology and genetics. By examining the population genetic\r\nstructure, gene flow, and mating system of Elymus glaucus, recommendations for the\r\nsuccessful growth and transfer of seed can be made.\r\nIsozymes and morphological traits were used to study 40 Elymus glaucus\r\npopulations located within British Columbia. F[sub st] values, based upon 21 isozyme loci,\r\nwere high (0.65) suggesting that species' diversity is predominantly distributed between\r\nrather than within populations. Q[sub st] analysis, an index analogous to F[sub st], was used to\r\ndescribe population differentiation of the morphological traits measured. Continuous\r\ntraits displayed an average Q[sub st][sup c] of 0.80 while the discontinuous trait mean Q[sub st][sup d] was 0.44.\r\nIt seems that the distribution of diversity follows the same trend set by isozyme\r\ndistributions in that morphological diversity of this native grass species is partitioned\r\nbetween rather than within populations. F[sub is] and F[sub it] estimates showed a deficiency of\r\nheterozygote individuals. This may be due to inbreeding, a colonization effect, or a\r\nrecent evolutionary bottleneck. Mating system analysis of three Vancouver Island\r\npopulations indicates that outcrossing does occur within Elymus glaucus. The\r\ndistribution of Elymus glaucus populations seems characteristic of species undergoing\r\nmetapopulation dynamics. This observation is supported by its high F[sub st], low geographic\r\nstructuring (isolation by distance), and the patchiness of its environment.\r\n\r\nQuestions addressed by this thesis pertain to the degree of adaptation and\r\nplasticity this grass possesses. In nature, is there any indication of genetic or\r\nmorphological structuring? Will a high degree of genetic diversity be enough for this\r\ngrass to successfully evolve and adapt to different environmental conditions? Or does\r\nphenotypic plasticity hold the key to its survival in non-local habitats? The answers to\r\nthese questions will help uncover the evolutionary life history of this native grass species\r\nand facilitate the development of successful strategies for reclaiming disturbed habitats\r\nusing native grasses.","language":"en"},{"key":"dc.format.extent","value":"4002015 bytes","language":null},{"key":"dc.format.mimetype","value":"application\/pdf","language":null},{"key":"dc.language.iso","value":"eng","language":"en"},{"key":"dc.publisher","value":"University of British Columbia","language":null},{"key":"dc.rights","value":"For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https:\/\/open.library.ubc.ca\/terms_of_use.","language":null},{"key":"dc.title","value":"Reclaiming disturbed habitats using native grasses : the genetic story of Elymus glaucus (blue wildrye)","language":"en"},{"key":"dc.type","value":"Text","language":null},{"key":"dc.degree.name","value":"Master of Science - MSc","language":"en"},{"key":"dc.degree.discipline","value":"Forestry","language":"en"},{"key":"dc.degree.grantor","value":"University of British Columbia","language":null},{"key":"dc.date.graduation","value":"2000-05","language":"en"},{"key":"dc.type.text","value":"Thesis\/Dissertation","language":"en"},{"key":"dc.description.affiliation","value":"Forestry, Faculty of","language":null},{"key":"dc.degree.campus","value":"UBCV","language":"en"},{"key":"dc.description.scholarlevel","value":"Graduate","language":"en"}]