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    Author(s): Robert K. Campbell; Albert I. Sugano
    Date: 1993
    Source: Res. Pap. PNW-RP-461. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 23 p
    Publication Series: Research Paper (RP)
    Station: Pacific Northwest Research Station
    PDF: View PDF  (1.078 MB)

    Description

    Provisional seed zones and breeding zones were developed for Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) in the Siskiyou National Forest in southwestern Oregon. Zones were based on maps of genetic variation patterns obtained by evaluating genotypes of trees from 260 locations in the region. Genotypes controlling growth vigor and growth rhythm were assessed in a common garden. Within the Forest, three breeding blocks were recommended, with different numbers of elevational bands in each block: from 0 to 610 meters, from 611 to 838 meters, and then a series of bands 152 meters wide at higher elevations.

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    Citation

    Campbell, Robert K.; Sugano, Albert I. 1993. Genetic variation and seed zones of Douglas-fir in the Siskiyou National Forest. Res. Pap. PNW-RP-461. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 23 p

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    Keywords

    Pseudotsuga menziesii, geographic genetic variation, adaptation, ecological genetics, genecology

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