A5101757901- Genetic diversity and population structure
- Cocoa and Sweet Potato Agronomy
- Plant and animal studies
- Energy and Environment Impacts
- Phytochemical compounds biological activities
- International Maritime Law Issues
- Genetically Modified Organisms Research
- Environmental and Cultural Studies in Latin America and Beyond
- Mexican Socioeconomic and Environmental Dynamics
- Ecology and Vegetation Dynamics Studies
- Psidium guajava Extracts and Applications
- Plant and Fungal Species Descriptions
- Silkworms and Sericulture Research
- Crop Yield and Soil Fertility
- Plant Diversity and Evolution
- Forest Insect Ecology and Management
- Forest Management and Policy
- Vibrio bacteria research studies
- Conservation, Biodiversity, and Resource Management
- Wildlife Conservation and Criminology Analyses
- Chemistry and Chemical Engineering
- Plant tissue culture and regeneration
- Coastal and Marine Management
- Insect-Plant Interactions and Control
- Genetic and phenotypic traits in livestock
Universidad Nacional
2012-2020
Instituto Nacional de Salud
2020
Centro Agronomico Tropical de Investigacion y Ensenanza Catie
1997-2018
Universidad Nacional Experimental de las Artes
2006
University of Pittsburgh
1966
The current distribution of forest genetic resources on Earth is the result a combination natural processes and human actions. Over time, tree populations have become adapted to their habitats including local ecological disturbances they face. As planet enters phase human-induced climate change unprecedented speed magnitude, however, previously locally-adapted are rendered less suitable for new conditions, 'natural' biotic abiotic taken outside historic distribution, frequency intensity...
Abstract Spanish Cedar ( Cedrela odorata L.) is a globally important timber species which has been severely exploited in Mesoamerica for over 200 years. Using polymerase chain reaction–restriction fragment length polymorphisms, its chloroplast (cp) DNA phylogeography was studied with samples from 29 populations six countries. Five haplotypes were characterized, phylogenetically grouped into three lineages (Northern, Central and Southern). Spatial analysis of ordered genetic distance...
Abstract While microsatellites have been used to examine genetic structure in local populations of Neotropical trees, studies based on such high‐resolution markers not carried out for Mesoamerica as a whole. Here we assess the Mesoamerican mahogany Swietenia macrophylla King (big‐leaf mahogany), tree species recently listed endangered CITES which is commercially extinct through much its native range. We seven variable microsatellite loci diversity and population eight naturally established...
Cedrela odorata L. (Spanish cedar), an economically important timber species native to the American tropics, is focus of increasing conservation concern due high rates deforestation within its range. To assess extent genetic diversity and between populations this species, samples were obtained from 10 widely dispersed Costa Rica analysed for random amplified polymorphic DNA (RAPD) variation. Fourteen 10‐mer primers used generate 97 RAPD bands. Presence/absence data all bands subjected a...
Abstract Aim The origins of much Neotropical biodiversity remain a topic debate, with both palaeogeographical and more recent climatic drivers playing role in diversification among within species. Here we use combination molecular data to assess genetic variation species the tree genus Cedrela , focus on odorata test hypotheses diversification, place known ecotypic context detect intraspecific phylogeographical structure. Location Central South America, Cuba, Cayman Islands, Trinidad...
Abstract Aim Life history traits and range size are key correlates of genetic diversity in trees. We used a standardized sampling protocol to explore how life relate the magnitude, variance structuring (both between‐ within‐population) Neotropical tree species. Location The Neotropics Methods present meta‐analysis new population data generated for 23 species (=2,966 trees, 86 populations) across shared broad geographic area. compared established metrics these (e.g., diversity, structure,...
One concern in the ongoing debate over conservation status of mahogany has been possibility that selective logging, as a form negative phenotypic selection, might have led to deterioration genetic quality populations. The incidence and degree such ‘dysgenic’ effects is discussed, based on consideration logging practices, their expected empirical data selection forest trees. Loggers tended avoid diseased, small, very large poorly-formed individuals, consequently increase proportion poor...
Abstract We compared within-population variability and degree of population differentiation for neutral genetic markers (RAPDS) eight quantitative traits in Central American populations the endangered tree, Cedrela odorata. Whilst diversity (Shannon index) (heritability, coefficient additive variation) were uncorrelated, both marker types revealed strong between from Atlantic coast Costa Rica rest species’ distribution. The interpopulation was higher RAPD (F ST = 0.67 sampled Mesoamerican...