Yeirme Yaneth Jaimes Suarez
@agrosavia.co
Research Center La Suiza
Corporación Colombiana de Investigación Agropecuaria - AGROSAVIA
RESEARCH INTERESTS
Phytopathology, Population Biology, Microbiology
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Yeirme Jaimes, Carolina Gonzalez, Jairo Rojas, Jessica Johana Rivera, Christian Cilas, and Xavier Argout
Scientific Societies
The witches’ broom (Moniliophthora perniciosa) is considered as one of the main threats for cacao production and, consequently, for chocolate production worldwide. In this work, the genetic diversity and population structure of M. perniciosa were analyzed for 59 isolates collected in five departments of Colombia and using 10 microsatellite markers. Analyses revealed 35 multilocus genotypes and clonal populations structure according to linkage disequilibrium analysis. One of the objectives of this study was to determine whether populations were differentiated by geographic origin or Theobroma cacao host genotype. Analysis of molecular variance, discriminant analysis of principal components, and Bruvo genetic distance suggested that the genetic structure was driven by geographic origin and not by T. cacao genotype. The results of this study were consistent with previous findings obtained in other cocoa-producing countries. Important insights were discussed regarding the dispersal patterns of the pathogen in Colombia and the genetic change of its populations because of different environmental conditions.
Albert Sneyder Carvajal-Rivera, Yeirme Yaneth Jaimes-Suárez, Remigio Anastacio Guzmán-Plazola, Carlos Fredy Ortiz-García, and José Sergio Sandoval-Islas
Springer Science and Business Media LLC
Jairo Rojas-Molina, Leidy Ortiz-Cabralez, Laura Dayana Escobar-Pachajoa, Mervin Rojas-Buitrago, and Yeirme Yaneth Jaimes-Suarez
Universidad de Costa Rica
Introducción. El ciclaje de nutrientes cumple un papel muy importante dentro de la sostenibilidad de sistemas productivos. En el cultivo de cacao (Theobroma cacao L.), la descomposición de la biomasa generada por las podas es base fundamental en la dinámica de nutrientes dentro del sistema. Objetivo. Cuantificar la tasa de descomposición y liberación de nutrientes de diferentes tipos de residuos vegetales generados por labores de poda del árbol de cacao. Materiales y métodos. El estudio se realizó en una finca cacaotera localizada en Rionegro, Santander, Colombia, entre junio y diciembre de 2012. Se estimó la tasa de descomposición y liberación de nutrientes (N, P, K, Ca, Mg) en los tratamientos T1: hojas y ramillas, T2: ramas secundarias y T3: ramas primarias, durante cinco períodos (8, 15, 23, 84 y 113 días); a través de la técnica de bolsas de descomposición. Resultados. La tasa de descomposición y liberación de nutrientes en hojas y ramillas fue significativamente más alta a los ocho días (0,1 k día-1), en comparación con ramas secundarias (0,06 k día-1) y ramas primarias (0,05 k día-1). La descomposición de las ramas secundarias presentó tendencia a ser constante a través del tiempo, pero fue el material con mayor porcentaje de liberación de nutrientes al final de la evaluación (91,4 % N; 83,67 % P; 87,40 K; 82,17 % Ca y 77,29 % Mg). Conclusión. Al inicio de la descomposición y liberación de nutrientes el aporte de estos al sistema se dio por la biomasa obtenida a partir de hojas y ramillas; sin embargo, conforme avanzó el tiempo el aporte se dio por la biomasa de ramas secundarias y primarias con una liberación más lenta de nutrientes.
Jaime A Osorio-Guarín, Jhon A Berdugo-Cely, Roberto A Coronado-Silva, Eliana Baez, Yeirme Jaimes, and Roxana Yockteng
Oxford University Press (OUP)
Abstract Cacao (Theobroma cacao L.), the source of chocolate, is one of the most important commodity products worldwide that helps improve the economic livelihood of farmers. Diseases like frosty pod rot caused by Moniliophthora roreri and witches’ broom caused by Moniliophthora perniciosa limit the cacao productivity, this can be solved by using resistant varieties. In the current study, we sequenced 229 cacao accessions using genotyping-by-sequencing to examine the genetic diversity and population structure employing 9,003 and 8,131 single nucleotide polymorphisms recovered by mapping against two cacao genomes (Criollo B97-61/B2 v2 and Matina 1-6 v1.1). In the phenotypic evaluation, three promising accessions for productivity and 10 with good tolerance to the frosty pod rot and witches’ broom diseases were found. A genome-wide association study was performed on 102 accessions, discovering two genes associated with productivity and seven to disease resistance. The results enriched the knowledge of the genetic regions associated with important cacao traits that can have significant implications for conservation and breeding strategies like marker-assisted selection.
Yeirme Y. Jaimes, Fabienne Ribeyre, Carolina Gonzalez, Jairo Rojas, Edson L. Furtado, and Christian Cilas
Scientific Societies
Frosty pod rot (FPR) caused by Moniliophthora roreri is the primary disease affecting cacao production in the major producing countries of the Americas and is one of the major threats to cacao worldwide. The incidence of FPR on clones with different levels of resistance was investigated in four localities of Santander State, Colombia, between July 2013 and May 2015. Dynamics of diseased pods were modeled using boosted regression trees, a machine learning technique that allows regressions to be performed without prior statistical assumptions. The results suggested that FPR epidemics varied according to plot location, clone, weeks of observation, and total pods produced. Dynamics in the phenology of pods had an effect on the epidemics, and this dynamic could partially explain the difference in resistance among clones. Although not total, partial resistance of ICS 95 was confirmed. An important wilt effect was observed, particularly in the resistant clones; consequently, differences in harvested pods were not significant among clones. Pod stripping remains a good practice for the management of the disease and this practice could also have an effect on the pod dynamics and wilt phenomenon.
Jairo Rojas M., Victor Caicedo, and Yeirme Jaimes
Universidad Nacional de Colombia
The study was carried out in an agroforestry system (AFS) with cacao trees already established in La Suiza Research Center, Corpoica, located in Rionegro, Santander (Colombia). The objective was to evaluate biomass input and nutrient release rate of the species that comprise the AFS (Gmelina arbórea, Gliricidia sepium, Cedrela odorata, Theobroma cacao). The plant material decomposition process of the species was monitored with decomposition bags after 8, 15, 23, 84 and 113 days, evaluating remnant weight and nitrogen, phosphorous, potassium, calcium and magnesium content. Results showed significant differences in plant material decomposition of the species considered. The largest weight loss was found in G. arborea (87.55%) and the lowest in C. odorata (40.01%). The highest nutrient release value was found in G. arborea followed by G. sepium, and the lowest in T. cacao and C. odorata.Therefore, depending on the species that comprise the AFS there is a differential leaf biomass decomposition dynamic and hence, of the nutrient input to the soil. Of the species evaluated the highest input of new organic matter to the soil in this AFS comes from G. arborea. Altogether, the litter generated by the species evaluated contributed with 10% of the nutrients required for a cacao harvest.
Yeirme Y. Jaimes, Carolina Gonzalez, Jairo Rojas, Omar E. Cornejo, Maria F. Mideros, Silvia Restrepo, Christian Cilas, and E. L. Furtado
Scientific Societies
Frosty pod rot (FPR) disease on cocoa, caused by Moniliophthora roreri, is one of the most devastating cocoa disease in the Western Hemisphere. In Colombia, the disease is particularly severe in the Magdalena Valley, which is considered the possible center of origin for the pathogen species. We analyzed the genetic diversity of isolates from the departments of Santander, Antioquia, Tolima, and Huila in Colombia using 23 simple-sequence repeats (SSR) markers. In total, 117 different multilocus genotypes were found among 120 isolates, each one representing a unique haplotype. High mutation rates in the SSR and gene flow can explain the high levels of diversity. Also, the observed and standardized indexes of association (IA and řd) indicate that the populations of M. roreri are clonal. Furthermore, given the high haplotype diversity and the significant linkage disequilibrium observed, we hypothesize that M. roreri could be a primarily asexual species undergoing sporadic recombination or partial recombination through parasexuality. A Bayesian clustering analysis implemented by STRUCTURE showed that the most probable number of genetic groups in the data was three, confirming the geographical differentiation among isolates. Similar results were obtained by a discriminant analysis of principal components, a principal coordinate analysis, and a neighbor-joining tree from microsatellite loci base on Nei distance. Cacao genotypes and environmental variables did contribute to the genetic differentiation of the groups. We discuss how this information could be used to improve the management of FPR at the regional level.
Yeirme Jaimes, Jairo Rojas, Christian Cilas, and Edson L. Furtado
Elsevier BV
C.A. Moreno, F. Castillo, A. González, D. Bernal, Y. Jaimes, M. Chaparro, C. González, F. Rodriguez, S. Restrepo, and A.M. Cotes
Elsevier BV