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ATTI del Terzo Congresso Nazionale di Selvicoltura per il miglioramento e la conservazione dei
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doi: 10.4129/CNS2008.004 Citazione
- Citation
Autori - Authors GIANNINI R., Dipartimento di Scienze e Tecnologie Ambientali Forestali, Università degli Studi di Firenze
Titolo: SELVICOLTURA
E VARIABILITà GENETICA: FUNZIONALITà E CONSERVAZIONE DEGLI ECOSISTEMI
FORESTALI Title:
SILVICULTURE AND GENETIC
VARIABILY: FUNCTIONALITY AND CONSERVATION OF THE
Parole
chiave: variabilità
genetica, selvicoltura, conservazione, genomica di popolazione. Riassunto Summary It
is well known that the primary ground of sylviculture is the eco-bilogical
knowledge of forest ecosystems, as well as, the understanding of
relationships among functionality, productivity and stability. In this
triangle, high genetic diversity has been shown the enhance ecological
efficiency on spatial scale and over various intervals of time. As forest
trees are normally the keystone of forest ecosystems, they continued
existence, is essential for the presence of organisms associations and for
their environment. Genetic diversity is the key component for long
term survival of the forest tree populations and, at the same time, the
foundation of sustainability because it provides leading material for
continued adaptation and evolution. Genetic variability is also the basis
for tree improvement trough selective breeding. Morfo-functional diversity
is controlled by the genetic variability that contributes to realize the
structuring pace/time of the species as well as resulting of the
interaction between genetic systems and environment. The characteristics
of the reproductive system that control the transmission of the genetic
information, jointly to the action of evolutionary factors, determine a
great individual genetic variability inside the populations that is the
essential key of survival and adaptation. As all forms of life have an
intrinsic value that can be ecological and economical, potential or
realized, the management of the genetic diversity involves all in the
maintenance: a reduction of it can predispose forests to
environment-related decline in health and productivity. Population
genomics, through allelic effects on phenotypes and identifying patterns
of adaptative variations at the environment level, will constitute, in the
future, a useful tool to foreseen conservation strategies for forest
trees.
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