Tree improvement in the Pacific Northwest.

R. Johnson

Treesearch

Tree improvement in the Pacific Northwest.

Informally Refereed

Authors:

R. Johnson

Year:

2000

Type:

Scientific Journal

Station:

Pacific Northwest Research Station

Source:

In: Rose, R.; Hasse, D.L. Proceedings advances and challenges in forest regeneration. Corvallis, OR: Oregon State University. 29-34.

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Download (PDF 449 KB): https://research.fs.usda.gov/download/treesearch/4921.pdf

Abstract

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.

Keywords

tree breeding, genetic gain, genetic diversity, disease resistance

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.