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Natural Hybridization of Yellow Birch and Paper Birch

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Abstract:

Twenty natural hybrids between yellow birch, Betula alleghaniensis, and paper birch, B. papyrifera, are reported from Michigan, Minnesota, and New Hampshire. The seed parent is apparently B. alleghaniensis. Hybridization is likely where the parents occur together, and in these areas the production of hybrid seeds is apparently widespread. The establishment of hybrid seedlings is most common on disturbed, mesic sites along roadsides and in cut-overs. Hybrids are distinguished by their bark color and texture, fruit characters, and the number of leaves borne on short shoots. Single-variate and multivariate analyses showed the hybrids were intermediate between the parents in leaf characters but resembled B. alleghaniensis more closely in fruit traits. The taxa do not differ in pollen size and abortion percentage. Seeds of two hybrids were germinable. Forest Sci. 20:215-221.

Keywords: Betula alleghaniensis; Betula papyrifera; Multivariate analysis; canonical variates; pollen; variation

Document Type: Journal Article

Affiliations: Assistant Technical Associate, Ecological Sciences Department, C. W. Rice Division, NUS Corporation, Pittsburgh, Pa.

Publication date: 1974-09-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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