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Publications (115)
Potato cyst nematodes (PCNs; Globodera spp.) cause significant losses in worldwide cultivated potato (Solanum tuberosum) crops. In Colombia, PCN was first reported in 1970 (Baeza 1972), although this report lacked a comprehensive species description and diagnosis. After that, G. pallida has been the only PCN species reported affecting potatoes in t...
Polymorphic microsatellite sequences were mined from gen-ome sequences of two Lippia origanoides wild specimens from disjunct locations. Twenty-three primer sequences flanking the candidate markers were designed, and their usefulness for population genetic analysis was assessed in plants sampled from four municipalities in Colombia. A final set of...
Potato cyst nematodes (PCN) from the genus Globodera spp. cause major losses in the potato (Solanum tuberosum) industry worldwide. Despite their importance, at present little is known about the status of this plant pathogen in cultivated potatoes in Colombia. In this study, a total of 589 samples collected from 75 geographic localities in nine pota...
Potato cyst nematodes (PCN) from the genus Globodera spp. cause major losses in potato ( Solanum tuberosum ) industry worldwide. Despite their importance, at present little is known about the status of this plant pathogen in cultivated potatoes in Colombia. In this study, a total of 589 samples collected from 75 geographic localities from nine pota...
El modelamiento de la distribución geográfica de las espe-cies constituye un área de conocimiento de gran interés para estrategias de conservación y más si se estudian aquellas que tienen una fuerte presión por la supervivencia en los espacios y nichos en los cuales coexisten en su forma silves-tre. Este tipo de estudios también se utilizan para id...
El género Elaeis pertenece a la familia Arecaceae y está compuesto por la palma americana Elaeis oleifera (Kunth) Cortés y la palma africana Elaeis guineensis (Jacq). Aunque E. guineensis es la especie de palma más utilizada para la producción de aceite en Colombia, su rendimiento se ve afectado por enfermedades como la pudrición del cogollo. Sin e...
Elaeis oleifera es una especie de palma perteneciente a la familia de plantas Arecaceae, ampliamente distribuida en América (Roskov et al., 2018). Esta palma posee características únicas que le permiten existir de manera silvestre en muchas regiones de Colombia (Corley y Tinker, 2003). No obstante, el crecimiento agroindustrial de diferentes monocu...
Background:
Studying species with disjunct distributions allows biogeographers to evaluate factors controlling species ranges, limits on gene flow, and allopatric speciation. Here, we use phylogeographic and population genetic studies of the barnacle Pollicipes elegans to discriminate between two primary hypotheses about the origin of disjunct dis...
The stubby-root nematode, Trichodorus obtusus, was recently identified on zoysiagrass in South Carolina, USA. In Florida, T. obtusus causes more damage than other stubby-root nematodes encountered in turfgrass. The objective of this study was to use morphological analysis, mitochondrial DNA (COI: cytochrome oxidase 1) and nuclear (18S rRNA) sequenc...
As environmental temperatures increase and become more seasonally variable, the ability of individuals to plastically alter their physiological responses to temperature (=accli-matize) may affect the potential for species persistence. Among marine organisms, the larval stage is often the most physiologically sensitive; larvae are also often the mai...
This dissertation explores the systematics, biogeography, and genomics of the gooseneck barnacle Pollicipes elegans, a marine crustacean of the tropical Eastern Pacific. In Chapter 1, I provide a broad framework for my research by introducing and focusing on the long-standing debate of the mechanisms behind the latitudinal gradient in species diver...
For the antitropical gooseneck barnacle Pollicipes elegans, population-specific physiological temperature tolerance of larvae may serve as a barrier to larval dispersal across the warmest regions of the tropical Pacific Ocean. Thermal tolerance ranges of larvae of three different populations of P. elegans sampled in 2011 and 2012 (Mexico [MX], El S...
The latitudinal gradient in species diversity suggests that tropical regions may act as a diversity engine that supplies the planet with novel animal and plant diversity. Despite that great advancement has been made identifying the mechanisms promoting speciation, not enough effort has been place on evaluating the role of latitudinal thermal gradie...
The Chilean isopod Excirolana hirsuticauda is a marine benthic brooder with wide distributional range and low potential for long-distance dispersal. Eleven microsatellite markers were developed for E. hirsuticauda using enriched libraries. Characterization of those loci in 35 individuals from Playa Blanca beach showed high allelic diversity with a...
One of the challenges for the culture of any species is to control the loss of genetic variability, which may result in a decrease in the quality of commercially important traits. The goal of this study is to assess the genetic diversity of a hatchery population of the Pacific abalone (Haliotis discus hannai) from the Center for Abalone Production...
Pacific abalone (Haliotis discus hannai) and Californian red abalone (Haliotis rufescens) are easily distinguished by their shell and epipodial characteristics. A few individuals of H. rufescens were discovered to have epipodial coloration similar to that of H. discus hannai suggesting that they may have been hybrids of the two species, because hyb...
Nine microsatellite loci are isolated and characterized for the marine isopod Limnoria sp., a model invertebrate species for the study of connectivity of marine brooders with high potential of dispersal through rafting. Analysis of 35 individuals of one population revealed a mean number of alleles of 12.66 and mean expected heterozygosity of 0.83,...
