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Search Results: 1 - 10 of 13759 matches for " Rafael;Barrios Ayala "
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Exploración y caracterización morfológica de poblaciones de la jamaica (Hibiscus sabdariffa L.) del estado de Guerrero, México Morphological exploration and characterization of roselle (Hibiscus sabdariffa L.) populations from state of Guerrero, Mexico
Noé Alarcón-Cruz,Rafael Ariza Flores,Aristeo Barrios Ayala,David H. Noriega Cantú
Revista mexicana de ciencias agrícolas , 2012,
Abstract: El presente estudio se realizó en las instalaciones de la Universidad Autónoma Chapingo durante el periodo de 2007 a 2009 y tuvo como objetivo caracterizar morfológicamente a 47 colectas de jamaica (Hibiscus sabdariffa L.) que representaron a poblaciones del estado de Guerrero. En la caracterización morfológica se evaluaron 50 variables, mismas que se separaron en 40 cuantitativas y 10 cualitativas. De las cuantitativas se seleccionaron 25 variables y de las cualitativas cinco con alta significancia. En la caracterización de datos morfológicos se utilizaron correlaciones, análisis de correspondencia y de agrupamiento. Los caracteres morfológicos cuantitativos que más aportaron a la diferenciación de los genotipos de jamaica fueron: longitud en la base del lóbulo principal de la hoja, longitud promedio del fruto, perímetro promedio del fruto, longitud vertical de la hoja, ángulo del lóbulo izquierdo de la hoja, croma (C) de la flor y promedio de color de hoja cuantificado con colorímetro (L). Los caracteres cualitativos que mejor ayudaron a definir los grupos de jamaicas fueron el color visual de la hoja, precocidad, color aparente del tallo, color de brácteas y ausencia o presencia de glándulas melíferas que contribuyeron de manera substancial en la separación de los grupos. During 2007 to 2009 period this study was performed. Taking place at facilities of Universidad Autonoma Chapingo, the aim was to morphologically characterize 47 collections of roselle (Hibiscus sabdariffa L.) that represented populations from the state of Guerrero. In morphological characterization 50 variables were assessed, which were divided into 40 quantitative and 10 qualitative variables. 25 were selected from the quantitative ones and five with high importance from the qualitative. For morphological data characterization correlations, correspondence and grouping analysis were used. The quantitative morphological characters that most contributed to differentiation of roselle genotypes were: width at the base of leaf's main lobule, average length of fruit, average fruit perimeter, leaf's vertical length, leaf's left lobule angle, flower's chroma (C) and average leaf's color quantified by colorimeter (L). The qualitative characters that best helped to define roselle groups were leaf's visual color, earliness, stem's apparent color, bracts color and lack or presence of glands, which substantially contributed to segregate the groups.
Exploración y caracterización morfológica de poblaciones de la jamaica (Hibiscus sabdariffa L.) del estado de Guerrero, México
Alarcón-Cruz, Noé;Ariza Flores, Rafael;Barrios Ayala, Aristeo;Noriega Cantú, David H.;Legaria Solano, Juan Porfirio;
Revista mexicana de ciencias agrícolas , 2012,
Abstract: during 2007 to 2009 period this study was performed. taking place at facilities of universidad autonoma chapingo, the aim was to morphologically characterize 47 collections of roselle (hibiscus sabdariffa l.) that represented populations from the state of guerrero. in morphological characterization 50 variables were assessed, which were divided into 40 quantitative and 10 qualitative variables. 25 were selected from the quantitative ones and five with high importance from the qualitative. for morphological data characterization correlations, correspondence and grouping analysis were used. the quantitative morphological characters that most contributed to differentiation of roselle genotypes were: width at the base of leaf's main lobule, average length of fruit, average fruit perimeter, leaf's vertical length, leaf's left lobule angle, flower's chroma (c) and average leaf's color quantified by colorimeter (l). the qualitative characters that best helped to define roselle groups were leaf's visual color, earliness, stem's apparent color, bracts color and lack or presence of glands, which substantially contributed to segregate the groups.
Efecto de la interacción genotipos × prácticas de manejo sobre el índice de cosecha de híbridos de maíz bajo riego
Barrios-Ayala,Aristeo; Turrent-Fernández,Antonio; Otero-Sánchez,Marco A; Ariza-Flores,Rafael; Michel-Aceves,Alejandro;
Interciencia , 2006,
Abstract: six maize field experiments conducted in southeastern mexico in the 1997-99 period were analyzed in order to evaluate genotype × crop management interaction on harvest index (hi). the validity of using a constant value for hi is questioned in modern hybrids of corn, in order to predict its growth from some modular, dynamics models which are additives and ignores factor interactions. 25 and 27 treatments of a rotatable central composite design for n, p, k, population density and planting date were assigned to main plots of a split plot design replicated twice. small plots were assigned to 3, 4 or 6 maize hybrids that had similar agronomic performance but differing genetic backgrounds. an interactive quadratic model for management factors and maize hybrids was fit by regression for harvest index (hi). dummy variables valued 0 or 1 accounted for maize hybrids. alternatively, a quadratic, additive model that ignored maize genotypes was fitted by regression. results reflected genotype × management interaction that varied significantly among hybrids and locations in the interactive model, causing significant variation in hi. extreme computed hi values were 0.32 and 0.60 for h-515 and hemoc hybrids, respectively. the interactive model consistently improved 14 to 47% the determination coefficient (r2) for hi.
Interacción genotipos X prácticas de manejo en el rendimiento de grano de híbridos de maíz
Barrios-Ayala, Aristeo;Turrent-Fernández, Antonio;Ariza-Flores, Rafael;Otero-Sánchez, Marco;Michel-Aceves, Alejandro;
Agricultura técnica en México , 2008,
Abstract: an alternative to the field method for generating recommendations of management in mexico is the use of modular, dynamic models of crop growth, which are additives in its conception and ignore the genotype. the objetive in this study was: 1) to prove that the recomendations for the use of maize crop cultivation can not be used for all genotypes of maize available for this and 2) data from three maize field experiments conducted in southeastern mexico, san gregorio and villa flores, chiapas and piedras negras, veracruz, was analyzed in order to evaluate the genotype x crop management interactions on grain yield . twenty-five treatments of a rotable, central composite design for n, p, k and population stand were assigned to main plots of a split plot design replicated twice. small plots were assigned to three or four modern maize hybrids that had similar agronomic performance but different genetic background. grain yield was fitted by regression with an additive model that ignored maize genotype and an interactive quadratic model for management factors and maize hybrids, in the last model dummy variables valued 0 or 1 accounted for maize hybrids. results reflected genotype by management interaction that varied significantly among hybrids and locations in the interactive model. the interactive model consistently improved 30% to 71% the determination coefficient (r2) of grain yield as compared to the additive model.
Biocontrol in vitro con Trichoderma spp. de Fusarium subglutinans (Wollenweb. y Reinking) Nelson, Toussoun y Marasas y F. oxysporum Schlecht., Agentes Causales de la "Escoba de Bruja" del Mango (Mangifera indica L.)
Michel-Aceves, Alejandro Casimiro;Otero-Sánchez, Marco Antonio;Solano-Pascacio, Leticia Yuridia;Ariza-Flores, Rafael;Barrios-Ayala, Aristeo;Rebolledo-Martínez, Andrés;
Revista mexicana de fitopatología , 2009,
Abstract: the antagonistic effect of native strains of trichoderma spp. was evaluated in vitro against fusarium oxysporum (fo) and fusarium subglutinans (fs), causal agents of mango "witches' broom". ten strains of the antagonistic fungus were isolated, one of which was selected and identified to the species level (t. harzianum); this species showed the highest percentage of antagonism inhibiting mycelial growth of fo by 62.9% and 42.0% of fs. in dual cultures between fo and/or fs with the selected strains of trichoderma, the time for the first contact for fo was between 3 and 4 days, and between 2 and 3 for fs. the greatest intersection area (0.87 cm) was observed in t. lignorum against fo, while the intersection area in fs with the native strain thzn-2 was 0.85 cm. native strains thzn-2 and thzcf-12, and the commercial one showed antagonism class 2, being able to stop growth of both plant pathogens. strain thzn-2 is promising as an alternative for biocontrol of fo and fs; however, it is necessary to evaluate it under field conditions.
Racism, poverty and other truths about sex: race, class and HIV risk among latino gay men
George Ayala,Rafael Díaz
Revista Interamericana de Psicología , 2001,
Abstract:
Los santos y las concepciones políticas y sociales en el Perú virreinal
Sánchez-Concha Barrios, Rafael
Hispania Sacra : Revista de Historia Eclesiástica , 2002,
Abstract: Work that exposes and defends how in Peru the holiness formed part of the culture and unified the society being a high-priority element, defendent by the Church and the State. The men with holiness reputation, the beatified and canonizad, accomplish a relevant social function and they were the referring of the republic. Trabajo que expone y defiende como en el virreinato de Perú la santidad formaba parte de la cultura y unificaba a la sociedad por ser un elemento prioritario de la misma, defendido tanto por la Iglesia como por el Estado. Los hombres con fama de santidad, así como los beatificados y canonizados cumplían una función social relevante y eran referentes obligados del cuerpo de la república.
Servicio de teleasistencia en pacientes tratados en una unidad de hemodiálisis
Eva Burgos Romero,Rafael Barrios García
Enfermería Nefrológica , 2012,
Abstract:
Contribuciones metodológicas para valorar la multifuncionalidad de la agricultura campesina en la Meseta Purépecha
DANTE ARIEL AYALA-ORTIZ,RAúL GARCíA-BARRIOS
Economía, sociedad y territorio , 2009,
Abstract: En este artículo se ofrece un análisis de la multifuncionalidad de la agricultura (MFA) campesina en la Meseta Purépecha de Michoacán (México), con el objetivo de identificar algunos de sus componentes y contribuir al desarrollo de una metodología adecuada para su valoración. Entre las innovaciones metodológicas propuestas destacan los métodos desarrollados para: 1) estimar oferta de bienes sin mercados a partir de esquemas de valoración contingente; 2) aproximarse a evaluar la calidad de vida, y 3) medir la diversificación del riesgo en el ingreso de hogares rurales.
Maniobra digital sobre el músculo dorsal ancho (m latissimus dorsi) para facilitar la disección axilar
Barrios Lugo,Gonzalo Rafael; Tejada Pérez,Augusto Oswaldo;
Revista Venezolana de Oncología , 2010,
Abstract: since 1990 we used during axillaries dissection in cases of breast cancer, a maneuver that allows us; identify better the axillaries vein in the external portion, finalize the dissection of wide dorsal muscle (m. latissimus dorsi), measure the thickness of the axillary weaves to dissect and discard the presence of the vascular lange arc, anomaly that can appear in 5 % to 6 % of the cases. we considered that this procedure helps to simplify the axillaries dissection during surgical act. we have not obtained publications that describe this maneuver and have decided to make this communication.
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