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Filtering by: Subject Forest genetics Peer Reviewed No

Seed set and the proportion of progeny due to self-fertilization in a Douglas-fir seed orchard

Creator:

Omi, Steven Katsu

Abstract:

The effects of clonal variability, crown position of cones, and top-pruning of ramets to reduce height growth, on 1) the proportion of viable self-fertilized progeny (s) and 2) the proportion of filled seeds (PF), were investigated in a 20 year-old Douglas-fir (Pseudotsuga menziesii [Mirb.1 Franco) seed orchard. Cones were collected...

Resource Type:

Masters Thesis
Effects of environment and genetics on western pine shoot borer, Eucosma sonomana, infestation levels in ponderosa pine plantations of central Oregon

Creator:

Prueitt, Sara C.

Abstract:

Infestations of the western pine shoot borer (Eucosma sonomana Kearfott) in young stands of ponderosa pine (Pinusponderosa Lawson), were surveyed on the Deschutes National Forest. Elevation, slope, aspect, tree height, tree diameter, number of shoots in the terminal whorl, stand density, stand age and plant association for each stand were...

Resource Type:

Masters Thesis
A pioneer exotic tree search for the douglas fir region

Creator:

Silen, Roy R. and Olson, Donald L.

Abstract:

After three-quarters of a century of introduction of 152 conifer and broadleaf species, no promising candidate exotic was found for the Douglas-fir region. Growth curves spanning 50 years or longer are figured for many species. Firs, pines, larches, spruces, hemlocks, and cedars originating in northwestern North America had superior growth...

Resource Type:

Other

Full Text:

genetic trends to run their course. And second, it is on an average Cascade forest site with a typically