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January 24, 2010 | History

Characterizing hybridization between native and non-native Crataegus species 1 edition

Characterizing hybridization between native and non-native Crataegus s ...
Melissa Alison Purich

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Characterizing hybridization between native and non-native Crataegus species.

Published 2005 .
Written in English.

About the Book

Crataegus monogyna Jacq. is an old world species that has become naturalized in parts of North America. Crataegus punctata Jacq. is a native species whose range is restricted to eastern North America. Both taxa are diploid, obligately outcrossing species that are aggressive colonizers. In southern Ontario, they are the most common sympatric species pair within the genus and have overlapping floral phenologies. Hybrid individuals occur sporadically throughout sympatric populations and are morphologically intermediate with respect to the parental taxa. Experimental crosses were performed and characteristics of the pollination biology of each species were examined: pollen production and viability, pollen tube growth and pollen:ovule ratios. Polymorphic alleles were identified with DNA microsatellite markers. The results collectively demonstrate that there are weak ecological and mechanical barriers to gene flow between these species.

Edition Notes

Source: Masters Abstracts International, Volume: 44-02, page: 0739.

Advisor: Tim Dickinson

Thesis (M.Sc.)--University of Toronto, 2005.

Electronic version licensed for access by U. of T. users.

GERSTEIN MICROTEXT copy on microfiche (2 microfiches).

The Physical Object

114 leaves.
Number of pages

ID Numbers

Open Library

History Created December 11, 2009 · 2 revisions Download catalog record: RDF / JSON

January 24, 2010 Edited by WorkBot add more information to works
December 11, 2009 Created by WorkBot add works page