Listar Biología por autor "2690b8f3-f44f-48cb-87f5-b00517992059"
Mostrando ítems 1-10 de 10
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Analysis of genetic diversity of Cucurbita moschata (D.) germplasm accessions from Mesoamerica revealed by PCR SSCP and chloroplast sequence data
Barboza Vargas, Natalia María; Albertazzi Castro, Federico José; Sibaja Cordero, Jeffrey Alejandro; Mora Umaña, Floribeth; Astorga, Carlos; Ramírez Fonseca, Pilar (2012-02)The aim of this research was the genetic characterization of 218 accessions of Cucurbita moschata Duchesne, a squash, and its relationship with morphological characteristics of agronomic interest, which are part of the ... -
Bemisia tabaci Biotype Q is present in Costa Rica
Guevara Coto, José Andrés; Barboza Vargas, Natalia María; Hernández Jiménez, Eduardo José; Hammond, Rosemarie W.; Ramírez Fonseca, Pilar (2011)Whiteflies are an insect group that comprises multiple species and biotypes, capable of affecting crops by phloem feeding, virus transmission and promotion of fungal colonization. The distribution of these pests is worldwide. ... -
Comparative Analysis of Three Different Total Nucleic Acid Extraction Protocols for the Diagnosis of Geminiviruses in Squash (Cucurbita moschata)
Mora Umaña, Floribeth; Hernández Jiménez, Eduardo José; Albertazzi Castro, Federico José; Karkashian Córdoba, James; Ramírez Fonseca, Pilar (2012)Squash (Cucurbita moschata) is one of the most important crops in tropical countries. Geminiviruses are an important group of plant pathogens. In 2002 a new begomovirus was reported to naturally infect squash and some other ... -
Effect of Gamma Irradiation and Selection with Fungus Filtrate (Rhizoctonia solani Kuhn) on the in Vitro Culture of Common Bean (Phaseolus vulgaris)
Solís Ramos, Laura Yesenia; Valdez Melara, Marta; Alvarado Barrantes, Ricardo; Mora Umaña, Floribeth; Hernández Jiménez, Eduardo José; Barboza Vargas, Natalia María; Ramírez Fonseca, Pilar (2015)The present investigation was undertaken to study the effect of gamma irradiation (dose from 10 to 100 Gy) and in vitro selection with fungus filtrate as selecting agent (concentration from 20% to 100%) on the susceptibility ... -
Establecimiento de cultivos celulares morfogénicos para el mejoramiento genético del frijol (Phaseolus vulgaris L.).
Valdez Melara, Marta; Gatica Arias, Andrés Mauricio; Ramírez Fonseca, Pilar; Solís Ramos, Laura Yesenia (2011-08-08)La investigación desarrolló la metodología y los protocolos experimentales para la regeneración de plantas de cultivo in vitro, a partir de tejidos somáticos en varios genotipos de frijol común (Phaseolus vulgaris L.) de ... -
Establecimiento de cultivos celulares para la regeneración in vitro del ayote (Cucúrbita moschata)
Valdez Melara, Marta; Gatica Arias, Andrés Mauricio; Ramírez Fonseca, Pilar (2012-04-09)Desarrollar la metodología y los protocolos experimentales para la regeneración de plantas en condiciones de cultivo in vitro, a partir de tejidos somáticos en varios genotipos de Ayote (cucúrbita moshata) de Costa Rica, ... -
First Report of Tomato chlorosis virus Infecting Sweet Pepper in Costa Rica
Vargas Zamora, José A.; Hernández Jiménez, Eduardo José; Barboza Vargas, Natalia María; Mora Umaña, Floribeth; Ramírez Fonseca, Pilar; Hammond, Rosemarie W. (2011-11)In September 2008, a survey of whiteflies and whitefly-borne viruses was performed in 11 pepper-growing greenhouses in the province of Cartago, Costa Rica. During this survey, the vast majority of sweet pepper (Capsicum ... -
Un método de transformación genética de maíz para conferirle resistencia ulterior a enfermedades virales
Valdez Melara, Marta; Madriz Ordeñana, Kenneth; Ramírez Fonseca, Pilar (2004-09)A method for genetic transformation of maize for resistance to viral diseases. A system for the genetic transformation of maize was developed for two Costa Rican varieties: CR-7 and Diamantes 8843, that can allow the ... -
Newly Discovered Natural Hosts of Tomato chlorosis virus in Costa Rica
Barboza Vargas, Natalia María; Hernández Jiménez, Eduardo José; Mora Umaña, Floribeth; Ramírez Fonseca, Pilar; Hammond, Rosemarie W.; Solórzano Morales, Antony (2011-04)Tomato chlorosis virus (ToCV) is an emerging whitefly-transmitted crinivirus. In Costa Rica in 2007, ToCV was detected in field-grown and greenhouse tomato (Solanum lycopersicum L.) plants causing symptoms of severe yellowing ... -
Ultrastructure and histology of organogenesis induced from shoot tips of maize (Zea mays, Poaceae)
Marín Méndez, Walter; Sánchez Chacón, Ethel; Gatica Arias, Andrés Mauricio; Ramírez Fonseca, Pilar; Freer Bustamante, Enrique; Valdez Melara, Marta (Revista de Biología Tropical; vol.57(supl.1), 2009-11)Shoot tips of maize (Zea mays L.) were cultured on Murashige and Skoog medium supplemented with 2 mg/l BA +1 mg/l 2,4-D +40 mg/l, to investigate phases of ontogenetic development. The study used light microscopy as well ...