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    Author(s): R. Johnson
    Date: 2000
    Source: In: Rose, R.; Hasse, D.L. Proceedings advances and challenges in forest regeneration. Corvallis, OR: Oregon State University. 29-34.
    Publication Series: Scientific Journal (JRNL)
    PDF: View PDF  (439 KB)

    Description

    Advanced-generation tree breeding programs are underway for Douglas-fir and coastal western hemlock. These programs will continue to improve growth rates and other traits. Regardless of whether seeds is from a seed orchard or natural collection, it must be used in its appropriated breeding zone or seed zone. These zones vary by species. Breeding programs are underway for other species as well, with many of these programs emphasizing disease and insect resistance. Absolute gains at rotation are still an unknown, but absolute (not percentage) gains observed early in the rotation should increase to some degree with time.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Johnson, R. 2000. Tree improvement in the Pacific Northwest. In: Rose, R.; Hasse, D.L. Proceedings advances and challenges in forest regeneration. Corvallis, OR: Oregon State University. 29-34.

    Keywords

    tree breeding, genetic gain, genetic diversity, disease resistance

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