Báo cáo lâm nghiệp: "Genetic variation of wood density components in a radiata pine progeny test located in the south of Chile" pps
Báo cáo lâm nghiệp: "Genetic variation of wood density components in a radiata pine progeny test located in the south of Chile" pps
... control of this trait appears to reach a maximum early in the life of trees and therefore maximumgains from selection can be obtained in the first-formed wood. In a 23 year-old radiata pine progeny ... until ring 18, while ear-lywood density followed an oscillating pattern of variation. In their study of families of radiata pine established in several sites in New Zealand, Cown and Ball [8] also ... 10. In radiata pine, Nicholls [24] also reported a systematicchange in heritability with cambial age for wood density. Heobserved that heritability of basic density in radiata pine decreased...
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Báo cáo lâm nghiệp:"Genetic correlations between wood density components in Pinus pinaster Ait." pptx
... with a 6, 10 and 13 cambial age. The AverageRing Density is more dependent on the Earlywood components, mainly on Earlywood Density, than Latewood ones. Among all the components analysed, Earlywood ... important for Portugal but also in almost all the Mediterranean basin, as it represents animportant softwood supplier (mainly in France, Spain andItaly) and can become important for other countries ... 64, 65]. In Australia Pinus pinaster was introduced in the 1950’s with the objective of planting 80000 ha.30000 ha of the total were already planted by 1990 and the second step had already begun...
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Báo cáo lâm nghiệp: "Genetic variation and genotype by environment interactions of juvenile wood chemical properties in Pinus taeda " pps
... effects are assumed to have 0 mean and G diagonalvariance-covariance matrix. Similarly, the errors assumed to have 0mean and R variance-covariance matrix (R = σ2In). The diallel ge-netic analyses ... another for all the traits.Genetic variation of wood properties 901Table II. Variance components (Estimate) explained by each random effect, the percentage over the total variance, individual-tree ... Yokoyama et al. [17], which allows the rapidcharacterization of fiber components and morphology of loblolly pine in a large number of samples. Briefly, the techniques involved areremoval of extractives,...
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Báo cáo lâm nghiệp: "Genetic variation of Prunus avium in susceptibility to cherry leaf spot (Blumeriella jaapii) in spatially heterogeneous infected seed orchards" docx
... semi-variogram using the NLIN procedure in SAS [28]. This theoreticalsemivariogram was used to partition the variation of residuals intospatially autocorrelated variation and random error with the ... in both sites) above amphybolites in Sergude and granites in Areas. The climate at both seed orchards isAtlantic. Areas has a mean temperature of 14.2◦C and 2503 mmfor total annual rainfall ... implicate a violation of the assumption of residualindependence of the analysis of variance. Residuals of each variableafter subtracting the clone effects were used to explore for any spa-tial...
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Báo cáo lâm nghiệp: "Genetic variation of Tunisian Myrtus communis L. (Myrtaceae) populations assessed by isozymes and RAPDs" pptx
... 0.05).AMOVA revealed that 63.57% of the total variation occurred within populations (Tab. VI). Variation amongpopulations belonging to the same bioclimatic zone waslower (4.32%) than that among the ... Multi-Variate Statistical PackageMVSP [27]. The genetic variation within and among populations or withinand between bioclimatic zones was also estimated by the molecu-lar variance analysis (AMOVA) [13], ... UPGMA cluster analysis performed on the simi-larity matrix calculated from the combination of allele (isozyme) andRAPD band frequencies data. Cluster analysis was carried out usingMulti-Variate...
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Báo cáo lâm nghiệp: "Genetic variation of Pinus pinaster Ait. seedlings in susceptibility to the pine weevil Hylobius abietis L." docx
... [2]. Particularly, the resin canals appearing in the bark of conifers constitute a phys-ical and chemical barrier to the insect, and the characteristics of those resin canals of Picea spp. have ... Curculionidae) on Pinus pinaster Ait. was evaluated in a fertilization× progeny test in Galicia (NW Spain) to determine the genetic variation among families and the possibility to include the resistance ... Galicia. Actually, maritime pine is the most commonly planted species in this region with anannual plantation rate of about 7 000 ha [4]. A breeding pro-gram for maritime pine in Galicia was started...
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Báo cáo khao học: "Genetic trends in wood density and radial growth with cambial age in a radiata pine progeny test" ppt
... wood density and radial growth with cambial age in a radiata pine progeny test Francisco Zamudio a* , Ricardo Baettyg a , Adriana Vergara a , Fernando Guerra a and Philippe Rozenbergb a Facultad ... growth traits at early ages and later ages, as well as on wood quality related traits of radiata pine. This research topicis relevant because the economic advantages of being able topredict the ... progeny test of radiata pine established with 31open pollinated families in the south of Chile by Forestal MinincoS .A. The test site was located in the Bio-Bio province, within the VIIIth political...
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Báo cáo lâm nghiệp: " Genetic control of the time of transition from juvenile to mature wood in Pinus radiata D. Don" pdf
... reliable estimates of GCA (General Combining Ability) andSCA (Specific Combining Ability) for radiata pine in Australia. De-tails of the Australia-Wide-Diallel program are given in Wu andMatheson ... latewood density in radiata pine increased withcambial age in 31 open-pollinated families. A similar patternwas observed by Wang [41], in families of lodgepole pine that showed that latewood density ... method to estimate cambial age of transition fromjuvenile to mature wood in a study of radiata pine. The age of transition from juvenile to mature wood in radiata pine canbe estimated only with...
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Báo cáo lâm nghiệp: "Radial variation of wood density components and ring width in cork oak trees" pptx
... and constant radially.3.5. Analysis of variation of ring and density components An analysis of variance was made on the ring and density components using the data for the first 30 rings that were ... Summary of the variance analysis for each wood density component and ring width, showing their significance and the percentage of total variation due to each source of variation. Sources of variation ... is the case of cork oak. In general the radial variation of cork oak wood density was small. There was a decrease of the density components in the first 30 years (more abrupt up to the 15th ring)...
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Báo cáo lâm nghiệp: "Genetic variability and divergence among Italian populations of common ash (Fraxinus excelsior L.)" ppt
... in mixed deciduous forestsall over Europe, from the Atlantic Ocean to the Don river and the Caucasian mountains, and from the southern part of Scan-dinavia to the Mediterranean Sea. It is a ... similar-ity of genetic variability levels between Italian and Bulgarianpopulations is remarkable, and palaeontological data support the hypothesis that southeastern Europe has been an impor-tant ... Provenance for common ash, al-though a deeper knowledge of the ecological characteristics of the areas of the study, such as vegetational and phytogeo-graphical data, is also needed.2. MATERIALS...
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