Báo cáo lâm nghiệp: "Genetic structure and phylogeography of pine shoot beetle populations (Tomicus destruens and T piniperda, Coleoptera Scolytidae) in Italy" pot
Báo cáo lâm nghiệp: "Genetic structure and phylogeography of pine shoot beetle populations (Tomicus destruens and T. piniperda, Coleoptera Scolytidae) in Italy" pot
... the two sibling species of pine
shoot beetle, Tomicus destruens and Tomicus piniperda, differ
strongly in relation to the genetic structure of their populations
in Italy as well as in Europe. T. ... seem to be
genetically unstructured because of both the continuous distribution area of its main host (Pinus sylvestris) and the international trade of pine
tim...
Báo cáo lâm nghiệp: "Horizontal structure of forest stands on permanent research plots in the Krkonoše Mts. and its development" ppsx
... characteristics of horizontal structure of
natural stands, according to the above author the
monitoring of the spatial structure can be used as
an indicator of the degree of forest stand natural-
ness ... usually investigated in forest stands from
the aspect of horizontal structure while from the
aspect of vertical structure it is the formation of
one or severa...
Báo cáo lâm nghiệp: "Canopy structure and spatial heterogeneity of understory light in an abandoned Holm oak woodland" pps
... similar to the one studied here relies on
the simplicity of its determination but not on the accuracy of
the estimations of understory light that can be obtained. The
incorporation of other canopy ... for the estimation of understory light, but pilot studies are
needed to determine the best protocol and sampling scale and
density.
The inclusion of the three neighbor points sit...
Báo cáo lâm nghiệp: "Genetic variation and genotype by environment interactions of juvenile wood chemical properties in Pinus taeda " pps
... improvement and intensive silviculture of loblolly
pine (Pinus taeda L.) have increased forest plantation produc-
tivity significantly in the southern United States [6]. With im-
proved growth, rotation ... is the degrees of freedom for the paired t test, P > |t| is the probability of t statistic.
in equation (1). Type B correlation (r
B_gca
) for a trait was estimated
usi...
Báo cáo lâm nghiệp: "Genetic parameters for lignin, extractives and decay in Eucalyptus globulus" pdf
... turning the paper yellow through oxidation
and light absorption [35]. The lignin and extractives contents
of wood, are traits that are fast being recognised as having im-
portance in minimising ... suited to this purpose. This study analysed genetic variation in lignin content, extractives content and decay, for nine localities of E. globulus.
Heritability estimates were also ob...
Báo cáo lâm nghiệp: "Genetic variability and divergence among Italian populations of common ash (Fraxinus excelsior L.)" ppt
... forest trees propagation,
including afforestation and in situ genetic preservation.
In this study we defined the structure of genetic variation
throughout the distribution of common ash in Italy. ... not bias the estimates of
population genetic parameters. It is also possible to assume
the presence of a Wahlund effect, that is the structuring of the
populations in subunit...
Báo cáo lâm nghiệp: "Genetic variation of Tunisian Myrtus communis L. (Myrtaceae) populations assessed by isozymes and RAPDs" pptx
... 17]. Knowledge of the level of genetic diversity within
and among populations constitutes the first step to understand
their subsequent evolution and to elaborate adequate preserva-
tion programs ... to better estimatethe genetic diversity and population
structure in order to avoid wrong conclusions for rational use
of species [28,46].
In this paper, we investigate the gene...
Báo cáo lâm nghiệp: "Stand structure, competition and growth of Scots pine (Pinus sylvestris L.) in a Mediterranean mountainous environment" pptx
... growth in Scots
pine stands in Sweden [2].
The hypothesis of our work is that the current diameter
growth of Scots pine is affected by competition in all types of
stand structure. Therefore, the ... photo-interpretation, visited
by experts, and a representative area of each type of structure was
delimited. In each of these representative areas of each stand stru...
Báo cáo lâm nghiệp: "In vitro clonal propagation of Acacia mangium Willd. and its evaluation of genetic stability through RAPD marker" ppsx
... combination for induction of rooting. In case of
rooting experiment, 10 replicates per treatment were taken and the
experiment was repeated thrice. The cultures were examined every
weeks and the ... growth by proliferating the axillary shoot within 2–
3 weeks of culture. Out of the various cytokinins tested, BAP
was the most effective for inducing bud break and growth in
a...
Báo cáo lâm nghiệp: "Improving RBS estimates – effects of the auxiliary variable, stratification of the crown, and deletion of segments on the precision of estimate" pps
... combination of
the two cutting points was indifferent for the young
pines, at 60% and 80% of the stem height for the old
pines, at 20% and 60% or at 40% and 60% for the
spruces and at 20% and ... represents the current total of the target variable
of the tree or stratum. (d) Deletion of segments in the strata of (c). e lines represent the slope of the relationshi...
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