Early Selection for Improving Volume Growth in Coastal Douglas-fir Breeding Programs
نویسندگان
چکیده
منابع مشابه
Growth of Residual Branches on Pruned Coastal Douglas-Fir
Anecdotal evidence gathered from pruning crew observations indicates that there may be enhanced branch growth at the new crown base in young pruned coastal Douglas-fir (Pseudotsuga menziesii var. menziesii) trees compared to unpruned trees. This has the potential to reduce the quality and value of the stem above the pruned portion of the bole. An analysis of the size of branches in the remainin...
متن کاملEffects of megagametophyte removal on DNA yield and early seedling growth in coastal Douglas-fir
Stratified seeds of coastal Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. menziesii) were germinated, sown in soil, and seed coats and megagametophytes were removed at various stages of early seedling development. Yield and quality of DNA extracted from the megagametophytes were related to several morphological traits of the seedlings after 2 months of growth in a controlled environmen...
متن کاملGenetic variation in response to shade in coastal Douglas-fir
Tree improvement programs have generally relied on testing families in open light environments. With increased interest in multiaged silvicultural systems, some people have questioned whether families selected in the open are appropriate for planting in the shade. We grew Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. menziesii) families from two climatically distinct seed sources for 2...
متن کاملEarly genetic testing of coastal Douglas-fir for Swiss needle cast tolerance1
The possibility of early testing coastal Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco) for Swiss needle cast (SNC; caused by Phaeocryptopus gaeumannii (Rohde) Petrak) tolerance was investigated using 55 Douglas-fir families from western Oregon. Seedlings were inoculated with P. gaeumannii naturally in the field and were visually scored for a variety of SNC symptom traits (i....
متن کاملGenetic maladaptation of coastal Douglas-fir seedlings to future climates
Climates are expected to warm considerably over the next century, resulting in expectations that plant populations will not be adapted to future climates. We estimated the risk of maladaptation of current populations of coastal Douglas-fir (Pseudotsuga menziesii var. menziesii) to future climates as the proportion of nonoverlap between two normal distributions where the means and genetic varian...
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ژورنال
عنوان ژورنال: Silvae Genetica
سال: 2012
ISSN: 2509-8934
DOI: 10.1515/sg-2012-0024