scholarly journals “Tayní”: variedad de frijol común Mesoamericano de grano rojo brillante

2021 ◽  
Author(s):  
Néstor Felipe Chaves Barrantes ◽  
Juan Carlos Hernández Fonseca ◽  
Rodolfo Araya Villalobos ◽  
Juan Carlos Rosas Sotomayor
Keyword(s):  
Costa Rica ◽  
Pseudocercospora Griseola

Introducción. El frijol de grano rojo es el segundo más consumido en Costa Rica. El mercado penaliza el precio del grano rojo oscuro y exige variedades de tono claro y brillante, aunque, las personas productoras requieren cultivares resistentes a patógenos y de alto potencial de rendimiento. Objetivo. Describir el proceso de desarrollo y las principales características agronómicas de la variedad Tayní. Materiales y métodos. Esta variedad se derivó del cruzamiento triple Tío Canela 75 // SRC1-1-18 / SRC 1-12-1 realizado en 1999 en la Escuela Agrícola Panamericana (Honduras). Fue evaluada en Costa Rica entre el 2002 y el 2008, por el Instituto Nacional de Innovación y Transferencia en Tecnología Agropecuaria y la Universidad de Costa Rica. El comportamiento y características agronómicas de Tayní se determinaron con base en la información obtenida de la evaluación de 4 viveros de adaptación, 28 ensayos de rendimiento y 32 parcelas de validación, llevados a cabo bajo manejo del productor en 12 localidades de Costa Rica. La variedad se liberó el 23 de febrero del 2012 en Pueblo Nuevo, Upala, Alajuela. Resultados. Tayní es una variedad de grano rojo claro brillante, que obtuvo un rendimiento de 1450 kg.ha-1 bajo manejo de la empresa productora y de 2063 kg.ha-1 en condiciones experimentales. Posee un hábito de crecimiento tipo II, resistencia intermedia a Pseudocercospora griseola (mancha angular) y a Thanatheporus cucumeris (mustia hilachosa), y resistencia a los virus del mosaico común (gen I) y del mosaico dorado amarillo (gen bgm-I y QTL mayor SW12). La tonalidad del rojo de su grano (grado 5) es de mayor valor comercial que la de Cabécar (grado 6). Bajo condiciones lluviosas, el grano de Tayní se decolora menos que el de Cabécar (1,1 y 2,8%, respectivamente). Conclusiones. La tonalidad del color rojo del grano y menor porcentaje de decoloración, le dan a Tayní ventaja comercial con respecto a Cabécar, la variedad de grano rojo más sembrada en Costa Rica

Identification of Maize Rayado Fino Virus by Immunoelectron Microscopy

1985 ◽  
Vol 43 ◽  
pp. 636-637
Author(s):  
O. E. Bradfute
Keyword(s):  
Electron Microscopy ◽  
Zea Mays ◽  
Costa Rica ◽  
Severe Disease ◽  
Rabbit Serum ◽  
Normal Rabbit Serum ◽  
Virus Particles ◽  
Far North ◽  
Maize Rayado Fino Virus ◽  
Antibody Coating

Maize rayado fino virus (MRFV) causes a severe disease of corn (Zea mays) in many locations throughout the neotropics and as far north as southern U.S. MRFV particles detected by direct electron microscopy of negatively stained sap from infected leaves are not necessarily distinguishable from many other small isometric viruses infecting plants (Fig. 1).Immunosorbent trapping of virus particles on antibody-coated grids and the antibody coating or decoration of trapped virus particles, was used to confirm the identification of MRFV. Antiserum to MRFV was supplied by R. Gamez (Centro de Investigacion en Biologia Celular y Molecular, Universidad de Costa Rica, Ciudad Universitaria, Costa Rica).Virus particles, appearing as a continuous lawn, were trapped on grids coated with MRFV antiserum (Fig. 2-4). In contrast, virus particles were infrequently found on grids not exposed to antiserum or grids coated with normal rabbit serum (similar to Fig. 1). In Fig. 3, the appearance of the virus particles (isometric morphology, 30 nm diameter, stain penetration of some particles, and morphological subunits in other particles) is characteristic of negatively stained MRFV particles. Decoration or coating of these particles with MRFV antiserum confirms their identification as MRFV (Fig. 4).

Social representations of human rights violations: Further evidence

2001 ◽  
Vol 60 (2) ◽  
pp. 89-98 ◽  
Author(s):  
Alain Clémence ◽  
Thierry Devos ◽  
Willem Doise
Keyword(s):  
Cluster Analysis ◽  
Human Rights ◽  
Costa Rica ◽  
Young People ◽  
Social Representations ◽  
Social Reality ◽  
Questionnaire Study ◽  
Human Rights Violations ◽  
High Tolerance ◽  
Individual Actions

Social representations of human rights violations were investigated in a questionnaire study conducted in five countries (Costa Rica, France, Italy, Romania, and Switzerland) (N = 1239 young people). We were able to show that respondents organize their understanding of human rights violations in similar ways across nations. At the same time, systematic variations characterized opinions about human rights violations, and the structure of these variations was similar across national contexts. Differences in definitions of human rights violations were identified by a cluster analysis. A broader definition was related to critical attitudes toward governmental and institutional abuses of power, whereas a more restricted definition was rooted in a fatalistic conception of social reality, approval of social regulations, and greater tolerance for institutional infringements of privacy. An atypical definition was anchored either in a strong rejection of social regulations or in a strong condemnation of immoral individual actions linked with a high tolerance for governmental interference. These findings support the idea that contrasting definitions of human rights coexist and that these definitions are underpinned by a set of beliefs regarding the relationships between individuals and institutions.

Prevalence and geographic distribution of haemophilia in Costa Rica

2010 ◽  
Vol 30 (S 01) ◽  
pp. S28-S31 ◽  
Author(s):  
J. Arroyo ◽  
L. Salazar-Sánchez ◽  
G. Jiménez-Cruz ◽  
P. Chaverri ◽  
E. Arrieta-Bolaños ◽  
...  
Keyword(s):  
Costa Rica ◽  
Survival Rates ◽  
Coagulation Factors ◽  
Developed Countries ◽  
Health Centers ◽  
Distribution Analysis ◽  
Distribution Maps ◽  
Immunodeficiency Virus ◽  
The Many ◽  
Low Prevalence

SummaryHaemophilia is the most frequent hereditary haemorrhagic illness and it is due to the deficiency of coagulation factors VIII (haemophilia A, HA) or IX (haemophilia B, HB).The prevalence of this disease varies according to the country, those having better survival rates having also higher prevalences. Specifically in Costa Rica, there are around 130 HA and 30 HB families. This study reports the prevalence and a spatial distribution analysis of both types of the disease in this country. The prevalence of haemophilia in this country is 7 cases per 100 000 men, for HA it is 6 cases per 100 000 and for HB it is 1 case per 100 000 male inhabitants. The prevalence of this disease is low when compared with other populations. This low prevalence could be due to the many patients that have died because of infection with human immunodeficiency virus during the 1980s. The prevalence of haemophilia in Costa Rica is almost one half of that present in developed countries. Nevertheless, the ratio between HA and HB follows world tendency: 5 : 1. In this study, nationwide geographical distribution maps were drawn in order to visualize the origin of severe cases and how this influences the pattern of distribution for both types of haemophilia. By means of these maps, it was possible to state that there is no association between the sites of maximum prevalence of mutated alleles and ethnicity. With this study, haemophilia prevalence distribution maps can be used to improve efforts for the establishment of hemophilia clinics or specialized health centers in those areas which hold the highest prevalences in this country. Also, this knowledge can be applied to improve treatment skills and offer the possibility of developing focused genetic counseling for these populations.

Osa Peninsula, Costa Rica: A unique opportunity to drill and instrument the seismogenic zone of large megathrust earthquakes

2019 ◽  
Author(s):  
Marino Protti ◽  
◽  
Nathan Bangs ◽  
Peter Baumgartner ◽  
Donald Fisher ◽  
...  
Keyword(s):  
Costa Rica ◽  
Seismogenic Zone ◽  
Osa Peninsula ◽  
Megathrust Earthquakes
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