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Early genetic selection in Douglas-fir : interactions with shade, drought, and stand density

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dc.contributor.advisor Perry, David A.
dc.creator Riitters, K. H. (Kurt H.)
dc.date.accessioned 2009-03-26T13:35:49Z
dc.date.available 2009-03-26T13:35:49Z
dc.date.issued 1985-04-19
dc.identifier.uri http://hdl.handle.net/1957/11069
dc.description Graduation date: 1986 en_US
dc.description.abstract This thesis is concerned with developing techniques for identifying "superior" Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) parent trees based on seedling progeny evaluation. The growth responses of up to 14 open-pollinated families to shade, drought, and stand density were assessed in four experiments. A technique was developed to compare family height growth responses to increasing stand density while accounting for genetic variation in growth rates. Family rankings based on seedling evaluation criteria were compared with 15-year growth records for an earlier cohort from the same parent trees. The significant findings of this study were: (1) fifteen-year field height rankings were related to differences in budset date, height growth rate, and branchiness among seedlings grown with or without shade or drought stress; (2) seedling-field correlations were inversely related to seedling-seed weight correlations; (3) seedling-field correlations improved with age in the field; (L) family correlations between spaced-plant growth and closed-stand growth were low for measures of seedling size but high for measures of seedling shape, and; (5) there was genetic variation in height growth responses to increasing stand density in single-family seedling plots. en_US
dc.language.iso en_US en_US
dc.subject.lcsh Douglas fir -- Genetics en_US
dc.title Early genetic selection in Douglas-fir : interactions with shade, drought, and stand density en_US
dc.type Thesis en_US
dc.degree.name Doctor of Philosophy (Ph. D.) in Forest Science en_US
dc.degree.level Doctoral en_US
dc.degree.discipline Forestry en_US
dc.degree.grantor Oregon State University en_US
dc.description.digitization PDF derivative scanned at 300 ppi (256 B&W), using Capture Perfect 3.0, on a Canon DR-9080C. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR. en_US


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