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The origins and evolutionary history of feral apples in southern Ontario

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dc.contributor.advisor Husband, Brian Cronin, Dane 2018-09-05T17:58:08Z 2018-09-05T17:58:08Z 2018-09 2018-08-23 2018-09-05
dc.description.abstract Feral populations of domesticated crops can establish through hybridization with native relatives, or through recombination of known cultivars. The relative importance of these two pathways is not known, especially for woody fruit crops. The goal of this study was to examine the evolutionary origins of feral populations of Malus domestica (domestic apple) in southern Ontario using a population genetics analysis. I characterized genotypes of 467 feral apple trees along with 127 commercial cultivars, ornamental crabapple cultivars and the native Malus coronaria, using 14 microsatellite markers. The feral trees were composed of seven genetic subgroups that are distributed throughout Ontario, and were associated with different commercial cultivars. The results suggest that feral apples are not products of hybridization with native M. coronaria, rather they have multiple origins, partly derived from early heritage cultivars. These lineages have spread and coexist throughout Ontario, rather than being derived strictly from local sources. en_US
dc.description.sponsorship NSERC en_US
dc.language.iso en en_US
dc.rights Attribution-NonCommercial-NoDerivs 2.5 Canada *
dc.rights.uri *
dc.subject Population genetics en_US
dc.subject Malus en_US
dc.subject Malus domestica en_US
dc.subject Malus coronaria en_US
dc.subject Domestic apple en_US
dc.subject Crabapple en_US
dc.subject Ferality en_US
dc.subject Invasion en_US
dc.title The origins and evolutionary history of feral apples in southern Ontario en_US
dc.type Thesis en_US Integrative Biology en_US Master of Science en_US Department of Integrative Biology en_US
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Attribution-NonCommercial-NoDerivs 2.5 Canada Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 2.5 Canada