2 edition of Seed set and the proportion of progeny due to self-fertilization in a Douglas-fir seed orchard found in the catalog.
Seed set and the proportion of progeny due to self-fertilization in a Douglas-fir seed orchard
Steven Katsu Omi
Written in English
|Statement||by Steven Katsu Omi.|
|The Physical Object|
|Pagination||, 75 leaves, bound :|
|Number of Pages||75|
Parameters were estimated from a progeny trial series established at two sites (25 years from planting) and their parents in a seed orchard (43 years from grafting). A standard half-sib analysis based on progenies and a parent–offspring regression was used for estimation of heritabilities. Rates of genetic diversity were inferred from allozyme allelic variation and used to compare differing seed crops that had originated from seed orchards under various seed production conditions with natural stands of western hemlock (Tsuga heterophylla (Raf.) Sarg). The supplemental mass pollination (SMP) technique was found to maximize both Ht and H0 when compared with unimproved wind.
TEMPORAL VARIATION OF THE MATING SYSTEM IN A NATURAL POPULATION OF JACK PINE W. M. Cheliak 1, B. P. Dancik 1, K. Morgan 1, F. C. H. Yeh 1, and C. Strobeck 1 1 Department of Forest Science, University of Alberta, Edmonton, Alberta, Canada T6G 2H1 Mating system parameters of a northern conifer, Pinus banksiana Lamb., were estimated from allozyme polymorphisms. Seeds . icantly different from the mean outcross seed-set of the pollen-fertile plants (t = , P = ). Progeny tests-Twenty-six progeny resulting from in- terpopulation crosses (F = 0) were tested for seed-set proportions. Mean self seed-set proportions ranged from 1 to , while mean proportions ofF =0 crosses ranged from to
Adapted autochthonous stands are valuable for in situ conservation of genetic resources and as the main seed sources for artificial regeneration .Therefore, there are two important aspects related to the genetic composition of the offspring: (1) the natural regeneration of the stand itself, and (2) the usage of the seeds for production and subsequent plantation of seedlings. Douglas-fir. BC Research with funding from Forest Renewal BC is attempting to transfer this technology to some of our other commercial conifer species in BC. The next useful polymorphic genetic markers are expected for lodgepole pine. References: Stoehr, M. And C. Newton. Estimation of natural selfing in a clonal row Douglas-fir seed orchard.
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Seed set and the proportion of progeny due to self-fertilization in a Douglas-fir seed orchard Public DepositedCited by: 3. A total crown estimate of the proportion of viable progeny due to selffertilization from the six sampled clones was about 10 percent.
These results show that crown position of cones, top-pruning, and clonal variation are all factors which could influence orchard management practices and. The amounts of self-fertilization versus consanguineous matings (as measured by effective selfing) was estimated in a seed orchard of Douglas-fir, using progeny array data at six allozyme loci.
Reduction in the proportion of filled seeds (seed set) owing to selfing was approximately 30% for three of the trees and 93% for the fourth. Following mixed pollinations we did not observe an.
Similar findings were reported in a Douglas fir SO, the H e of natural and seed orchard parental population were also similar, though slightly lower in the seed orchard progeny where the clones. In: Proc. IUFRO Joint Meeting of working parties on Breeding Theory, Progeny Testing and Seed Orchards, Williamsburg, Virginia (Abstract).
Omi, S. and Adams, W. Variation in seed set and proportions of outcrossed progeny with clones, crown position, and top pruning in a Douglas-fir seed orchard.
A multilocus estimation procedure (Green et al., ), for example, revealed that about 8 percent of the viable pro geny produced in a year-old Douglas-fir clonal orchard were selfs (Omi, S. and Adams, W., Seed set and the proportion of progeny resulting from selffertilization in a Douglas-fir seed orchard, manuscript in preparation).
This is a very common kind of seed orchard, and the procedure employed is illustrated in Figure 2. Plus trees are of the same species but originate from different geographic regions. These are called "provenance seed orchards" by Andersson () who described one such seed orchard containing Swedish and Polish clones of Picea abies.
As a seed orchard practice, SMP is clearly shown here to decrease the self-fertilization rate of seed orchard trees by about 10%. By contrast, both pollen blowing and floral hooding had no effect on observed selfing rates. Our results will help to define the effectiveness of seed orchard practices and to increase gains by reducing selfing.
Depiction of a tree improvement cycle after White  and Ruotsalainen . Symbols S, T and Â represent artificial selection, progeny testing, and crossing among individuals, respectively. The objective of seed orchard management is to maximize the genetic gain while maintaining sufficient level of genetic diversity in the orchard’s crops; however, balancing these two parameters is a challenging task.
Eight polymorphic nuclear microsatellite DNA markers were used to construct the full pedigree of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) bulk seeds from 49 orchard.
Pollen contamination effects on progeny from an off-site Douglas-fir seed orchard Article in Canadian Journal of Forest Research 24(10) February with 4 Reads How we measure 'reads'. Omi, S. and Adams, W. Variation in seed set and proportions of outcrossed progeny with clones, crown position, and top pruning in a Douglas-fir seed orchard.
Can. For. Res. 16(3): – CrossRef Google Scholar. Omi SK () Seed set and the proportion of progeny due to self-fertilization in a Douglas-fir seed orchard. MS Thesis, Oregon State University, Corvallis Google Scholar. A second-generation clonal Douglas-fir seed orchard located on southern Vancouver Island, British Columbia, Canada (48°35´N, °24´W, 50 m a.s.l.) provided the seed for this study.
The seed orchard was established in using the permutated neighborhood design (Bell and Fletcher ) to. Forest Ecology and Management, 31 () 45 Elsevier Science Publishers B., Amsterdam -- Printed in The Netherlands Reproductive Phenology, Parental Balance, and Supplemental Mass Pollination in a Sitka-Spruce Seed-Orchard YOUSRY A.
EL-KASSABY1'~ and SHEILA REYNOLDS1 1Canadian Pacific Forest Products Limited, Tahsis Pacific Region, Saanich Forestry. Omi, S.K., Adams, W.T. Variation in seed set and proportions of outcrossed progeny with clones, crown position, and top pruning in a Douglas-fir seed orchard Can.
Dahlgaard, J. and Warncke, E. () Seed set and germination in crosses within and between two geographically isolated small populations of Saxifraga hirculus in Denmark. Nordic Journal of Bot – 62 62 2 2 D. Shaw R. Allard Department of Genetics University of California Davis Calif.
USA Summary Seeds produced under open-pollination were collected from eight natural stands and a plus-tree seed orchard of Douglas-fir. These seeds were germinated and both diploid embryos and haploid gametophytes were analyzed by starch-gel electrophoresis. Eleven variable loci were resolved for.
Omi, S.K. & Adams, W. Variation in seed set and proportions of outcrossed progeny with clones, crown position, and top pruning in a Douglas-fir seed orchard. Canadian Journal of Forest Research Ritland, K.
& El-Kassaby, Y.A. The nature of inbreeding in a seed orchard of Douglas fir as shown by an efficient multilocus. However, seed orchard research has indicated this is affected by sub-optimal reproductive synchrony, varying proportion of gamete production among genotypes, pollen contamination and orchard site maladapation.
Secondly, although controlled pollinated (CP) seed can be produced from orchards, it is costly and the volume of seed per annum is finite. 30 Lecture notes on Tree improvement and Silviculture by Bishnu P Devkota, Establishment and Management of Seedling Seed Orchard The basic principles and methods of establishment of seedling seed orchard are same as clonal seed orchard.
Collect open pollinated seed (half-sib) from selected plus tree in their original locality or from.Theoretical and Applied Ge- netics OMI, S.
K., AND W. T. ADAMS. Variation in seed set and pro- portions of outcrossed progeny with clones, crown position, and top pruning in a Douglas-fir seed orchard. Canadian Journal of Forest Research ORR-EWING, A.
L. Inbreeding Douglas-fir to the S, generation.