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Mostrando ítems 1-20 de 21
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Clinal variation along precipitation gradients in Patagonian temperate forests: unravelling demographic and selection signatures in three Nothofagus spp.
(Springer Nature, 2020-01-10)Past demographic changes and current selection pressures determine the genetic variation displayed by Nothofagus species along rainfall gradients. Based on the diversity trends observed at candidate genes associated to ... -
Different drought‑adaptive capacity of a native Patagonian tree species (Nothofagus pumilio) resulting from local adaptation
(Springer, 2021-06)The resistance of different genotypes to abiotic stress may be due to genetic effects and/or to phenotypic plasticity allowing them to acclimate to variable conditions. The contribution of one or the other mechanism ... -
Diversidad genética en poblaciones de Swietenia macrophylla King (Meliaceae) en Costa Rica y Bolivia
(CATIE, Turrialba (Costa Rica), 2007)El presente trabajo se llevó a cabo en CATIE, Turrialba, Costa Rica entre julio de 2005 y octubre de 2006. Se estudió la variabilidad genética de la caoba (Swietenia macrophylla King) en 168 familias de 10 poblaciones de ... -
Drone aggregation behavior in the social wasp Vespula germanica (Hymenoptera: Vespidae): Effect of kinship and density
(Nature Research, 2020-04)Inbreeding can have negative consequences on population viability because of the reduced fitness of the progeny. In general, most species have developed mechanisms to minimize inbreeding such as dispersal and kin avoidance ... -
The effect of silvicultural management on the genetic diversity of a mixed Nothofagus forest in Lanín Natural Reserve, Argentina
(2016-03)El conocimiento del impacto de las prácticas de manejo forestal es crucial para permitir el uso de los recursos naturales garantizando al mismo tiempo la sostenibilidad de la variación genética, que es esencial para la ... -
Genetic diversity and patterns of population structure in Creole goats from the Americas
(Wiley, 2017)Biodiversity studies are more efficient when large numbers of breeds belonging to several countries are involved, as they allow for an in-depth analysis of the within- and between-breed components of genetic diversity. A ... -
Genetic diversity and population structure in Nothofagus pumilio, a foundation species of Patagonian forests: defining priority conservation areas and management
(Springer Nature, 2020-11)Patagonian forests are the southernmost temperate forests in the world, and Nothofagus pumilio is one of their most ecologically important tree species (i.e., a foundation species). It presents great adaptability and a ... -
Genetic variation for tolerance to high temperatures in a population of Drosophila melanogaster
(John Wiley & Sons Ltd, 2018-10)The range of thermal tolerance is one of the main factors influencing the geographic distribution of species. Climate change projections predict increases in average and extreme temperatures over the coming decades; hence, ... -
Genetic variation of xylem hydraulic properties shows that wood density is involved in adaptation to drought in Douglas-fir (Pseudotsuga menziesii (Mirb.))
(Springer, 2011-05)Relationships between wood density and hydraulic efficiency and safety (hydraulic specific conductivity and vulnerability to cavitation, respectively) could clarify the physiological process explaining the impact of density ... -
Local adaptation along a sharp rainfall gradient occurs in a native Patagonian grass, Festuca pallescens, regardless of extensive gene flow
(Elsevier, 2020-03)Increasing global aridity combined with changing environmental conditions might cause irreparable alterations in arid and semiarid ecosystems. Knowledge of within-species genetic diversity and adaptive responses, especially ... -
Logging by selective extraction of best trees: Does it change patterns of genetic diversity? : The case of Nothofagus pumilio
(2016)Un amplio conocimiento de las consecuencias ecológicas y genéticas de la aplicación de las prácticas de gestión en los ecosistemas naturales es de fundamental importancia para las acciones de conservación. El principal ... -
Mitochondrial DNA lineages and genetic variation of early growth traits in the Argentinean breeding population of Pinus ponderosa Douglas ex C. Lawson
(Springer, 2024-03)In the Andean-Patagonian region of Argentina, Pinus ponderosa Douglas ex C. Lawson is the most widely cultivated forest tree species. Its breeding program, started in 1998, is now progressing towards the establishment of ... -
New world goat populations are a genetically diverse reservoir for future use
(Springer Nature, 2019-02-06)Western hemisphere goats have European, African and Central Asian origins, and some local or rare breeds are reported to be adapted to their environments and economically important. By-in-large these genetic resources have ... -
Phylogenetic relationships and intraspecific diversity of a North Patagonian Fescue: evidence of differentiation and interspecific introgression at peripheral populations
(2018-03)Peripheral sites usually offer suboptimal conditions for species with wide distributions, where expression of phenotypic variability and potential interspecific hybridization might be enhanced. The Patagonian steppe, the ... -
Predicting the distribution of plant species from southern South America: are the hotspots of genetic diversity threatened by climate change?
(Springer, 2024-01)Biodiversity in all its dimensions is being threatened by climate change and the impact of human activities. Genetic diversity is a key dimension of biodiversity underlying adaptation to global changes. Here we assess the ... -
Ring density record of phenotypic plasticity and adaptation to drought in Douglas-fir
(Elsevier, 2009-08)Microdensity profiles of Douglas-fir’s clones and weather data were used to study phenotypic plasticity (dendroplasticity). Within-ring microdensity was interpreted as the variation of tree response to drought constraints ... -
The effects of Quaternary glaciations in Patagonia as evidenced by chloroplast DNA phylogeography of Southern beech Nothofagus obliqua
(Springer, 2009-03)Climatic oscillations during the Quaternary strongly affected the distribution of warm-temperate tree species, which experienced local restrictions into ice-free areas and posterior expansions. To evaluate the impact of ... -
Variabilidad genética en Raulí (Nothofagus nervosa (Phil.) Dim. et Mil. su relación con procesos evolutivos y su importancia en la conservación y utilización de sus recursos genéticos
(Centro Regional Universitario Bariloche, Universidad Nacional del Comahue, 2001-06)El Raulí, Nothofagus nervosa (Phil.) Dim. et Mil., es una de las especies arbóreas de los bosques Andino-patagónicos de importancia ecológica y económica. Su distribución en Argentina es muy reducida y relativamente ... -
Variación genética y ecofisiológica de Festuca pallescens (St. Yves) en relación a un gradiente pluviométrico en Patagonia Norte
(2018)Los ambientes heterogéneos presentan características climáticas, topográficas y edáficas que varían en tiempo y espacio favoreciendo la formación de gradientes clinales. Estos generan presiones de selección diferenciales ... -
Variación y diferenciación genética y fenotípica de la cabra criolla neuquina en relación con su sistema rural campesino
(Centro Regional Universitario Bariloche, Universidad Nacional del Comahue, 2003-07)La caracterización de los recursos genéticos en animales domésticos constituye el primer paso hacia su conservación y protección, por otra parte la ausencia de una definición de identidad en poblaciones locales no ...