8 documents found, page 1 of 1
Exploring reproductive biology in Eucalyptus globulus clones under distinct cli...
Anjos, Andreia; Jesus, Joana; Marques, Cristina; Borralho, Nuno; Valente, Carlos; Araújo, José Alexandre; Máguas, C.; Correia, Otília; Chozas, SergioDespite the great economic benefits, one of the major threats of introducing species into exotic ranges is their ability to regenerate and spread to novel environments. For example, Eucalyptus globulus plantations have been established in many parts of the world, using seedlings or clonal material, the latter often from advanced generation tree improvement programs. However, major concerns exist about this spec...
The Genetics and Ecology of Post-Fire Eucalyptus globulus Recruitment in an Iso...
Costa, Joana; Silva, Joaquim S.; Deus, Ernesto José Rodrigues Cardoso de; Pinho, Simão; Pinto, Joaquim F.; Borralho, NunoEucalyptus globulus Labill. is a widespread forest tree species, reported as naturalized across the introduced range, often showing abundant natural regeneration after wildfires. This paper studies a post-fire cohort of seedlings derived from a small, isolated E. globulus stand in central Portugal. The aim is to better understand the genetic dynamics and dispersal mechanisms of naturally established E. globulus...
Management and fire, a critical combination for Eucalyptus globulus dispersal
Anjos, Andreia; Fernandes, Patrícia; Marques, Cristina; Borralho, Nuno; Valente, Carlos; Correia, Otília; Máguas, Cristina; Chozas, SergioIn a context of growing demands for wood and wood derived products, plantations of exotic tree species have globally increased. Fast growth and high productivity made Eucalyptus one of the most successful tree genus around the world. Nevertheless, this genus is often associated with negative ecological impacts on biodiversity and ecosystem functioning and the risk of expansion is considered a major threat. Euca...
Estimativa do parentesco numa população de melhoramento de Eucalyptus globulus ...
Ribeiro, M.M.A.; Sánchez, Leopoldo; Borralho, Nuno; Marques, Cristina M.É situação comum desconhecer-se o grau de parentesco entre a população na origem da maioria dos programas de melhoramento genético de espécies florestais. Para resolver este problema, desenvolvemos um protocolo de avaliação do parentesco utilizando 125 indivíduos e 16 microssatélites, da população base ou de referência (PR) de Eucalyptus globulus do RAIZ. Através da recombinação gamética in silico foram simulad...
Caracterização das potencialidades de utilização da madeira de híbridos de euca...
Santos, José António dos; Santos, Joana; Borralho, Nuno; Araújo, JoséEstudaram-se oito clones de híbridos de eucalipto e um clone de Eucalyptus globulus Labill., para avaliação do potencial como madeira maciça. As madeiras correspondem a árvores jovens e foram caracterizadas física e mecanicamente e ainda através dos processos de transformação considerados mais representativos como a serragem e secagem, destacando-se, nesta última, os tratamentos térmicos para estabilização e el...
Optimizing the choice of microsatellite markers for fingerprinting eucalyptus
Sánchez, Leopoldo; Ribeiro, M.M.A.; Ribeiro, C.; Araújo, J.A.; Borralho, Nuno; Marques, Cristina M.In this study we have analyzed the information provided by 17 publicly available Eucalyptus microsatellite (SSR) markers (Brondani et al. 1998, 2002; Jones et al. 2002; Steane et al. 2001) in the context of genetic identification within a sample of 140 individuals from an elite collection (denoted hereafter base) of RAIZ genetic improvement population.
Molecular estimates of similarity in Eucalyptus globulus
Ribeiro, M.M.A.; Sánchez, Leopoldo; Ribeiro, C.; Carocha, V.; Araújo, J.A.; Borralho, Nuno; Marques, Cristina M.The base populations used in most forest tree genetic improvement programs usually lack detailed pedigree information. Molecular markers, such as microsatellites (SSR), can be used to estimate individuals’ pairwise relatedness, which is based on the probabilities’ ratios of the identity in state between the individuals compared and the reference unrelated population These estimates can be very useful to infer t...
Genetic control growth, wood density and stem characteristics of Pinus pinaster...
Almeida, Maria Helena; Aguiar, Alexandre; Borralho, NunoA Pinus pinaster Ait. progeny trial involving 46 open pollinated families was established at two locations in Portugal (Leiria and Escaroupim). Height, diameter, Pilodyn and stem characteristics (straightness, branch size and number of whorls) were assessed at age 5 and 12 and were used to estimate variance components, heritability, phenotypic and genetic correlations between traits. Estimates varied considerab...