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 maximum gains 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 sever...

Ngày tải lên: 08/08/2014, 00:21

... with a 6, 10 and 13 cambial age. The Average Ring 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 an important softwood supplier (mainly in France , Spain and Italy) and can become i...

Ngày tải lên: 08/08/2014, 01:21

... effects are assumed to have 0 mean and G diagonal variance-covariance matrix. Similarly, the errors assumed to have 0 mean and R variance-covariance matrix (R = σ 2 I n ). The diallel ge- netic analyses ... another for all the traits. Genetic variation of wood properties 901 Table II. Variance components (Estimate) explained by each random effect, the percentage over the total...

Ngày tải lên: 07/08/2014, 16:20

... semi- variogram using the NLIN procedure in SAS [28]. This theoretical semivariogram was used to partition the variation of residuals into spatially autocorrelated variation and random error with the ... in both sites) above amphybolites in Sergude and granites in Areas. The climate at both seed orchards is Atlantic. Areas has a mean temperature of 14.2 ◦ C and 2503...

Ngày tải lên: 07/08/2014, 16:20

... 0.05). AMOVA revealed that 63.57% of the total variation occurred within populations (Tab. VI). Variation among populations belonging to the same bioclimatic zone was lower (4.32%) than that among the ... Multi-Variate Statistical Package MVSP [27]. The genetic variation within and among populations or within and between bioclimatic zones was also estimated by the molecu- la...

Ngày tải lên: 07/08/2014, 16:21

... [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 t...

Ngày tải lên: 08/08/2014, 00:22

... 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 Rozenberg b a Facultad ... growth traits at early ages and later ages, as well as on wood quality related traits of radiata pine. This research topic is relevant because the economic adva...

Ngày tải lên: 08/08/2014, 14:20

... reliable estimates of GCA (General Combining Ability) and SCA (Specific Combining Ability) for radiata pine in Australia. De- tails of the Australia-Wide-Diallel program are given in Wu and Matheson ... latewood density in radiata pine increased with cambial age in 31 open-pollinated families. A similar pattern was observed by Wang [41], in families of lodgepole...

Ngày tải lên: 07/08/2014, 16:20

... 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 so...

Ngày tải lên: 07/08/2014, 16:20

... in mixed deciduous forests all 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 Bulgarian populations is remarkable, and palaeontological data support the hypothesis that southeastern Europe has b...

Ngày tải lên: 07/08/2014, 16:20