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Interspecific Hybridization with Fall- and Spring-Flowering Elms

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New interspecific hybrids were created between the fall-flowering elm species Ulmus parvifolia and U. serotina and nine spring-flowering species. The species used as male parents represented every taxonomic section and series in the genus. Thus, it would appear that there are no strong genetic barriers to gene interchange among diploid elm species. The tetraploid U. americana failed to produce hybrids with either fall-flowering species. Forest Sci. 18:283-289.

Keywords: Ulmus spp; flowering; pollination; polyploidy

Document Type: Journal Article

Affiliations: Research Geneticist, National Arboretum, USDA Agricultural Research Service, Washington, D.C. 20002

Publication date: December 1, 1972

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