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Search Results: 1 - 10 of 719 matches for " Aquiles Carballo Carballo "
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Interacción genotipo-ambiente en la estructura y calidad del nixtamal-tortilla del grano en híbridos de maíz
Zepeda-Bautista, Rosalba;Carballo-Carballo, Aquiles;Hernández-Aguilar, Claudia;
Agrociencia , 2009,
Abstract: maize farmers from the high central valleys (high central valleys) of méxico demand kernel varieties of quality to meet the expectations of the tortilla industry, as well as knowing the effect of the environment on this crop. an evaluation was made of the physical quality and structural components of kernel, nixtamal and tortilla in corn hybrids (zea mays l.) resulting from a genetic improvement program launched in 1998 at the colegio de postgraduados (cp). during each spring-summer cycle of 2004 and 2005 eight hybrids were cultivated at the cp montecillo campus, in montecillo, méxico, in a completely randomized block design with two repetitions. on the basis of the norm nmx-ff-034/1-scfi-2002 and the assessment made by the inifap corn laboratory, the hybrids mt-810, mt-1420, mt-131, mt-2223, mt-1415, mt-421, promesa and hs-2 meet the parameters for the preparation of tortillas and nixtamalized corn products. in 2005, the percentages of reflectance (color) and grain endosperm were higher (7.85 %) than in 2004 (2.82 %). in 2005, the flotation index rose in hybrids mt-810, mt-1420 and mt-1415, and dropped in mt-131, mt-2223 and hs-2. the climate and edaphic characteristics of the production site among years significantly modified (p<0.05) the percentages of endosperm, germ, pericarp and pedicel, as well as the characteristics of nixtamal and tortillas, in different proportions in terms of variety.
Distinción, homogeneidad y estabilidad mediante caracterización morfológica en variedades de amaranto Distinctness, uniformity and stability by morphological characterization in amarath varieties
Ma. Elena Ramírez,Aquiles Carballo Carballo,Amalio Santacruz Varela,Víctor Conde Martínez
Revista mexicana de ciencias agrícolas , 2010,
Abstract: Con el objetivo de valorar procedimientos para la evaluación de distinción, homogeneidad y estabilidad en variedades vegetales con fines de protección a derechos del obtentor, el presente estudio se realizó en los ciclos agrícolas primavera-verano 2006 y 2007, en lotes experimentales del Colegio de Postgraduados en Ciencias Agrícolas; se utilizaron 10 variedades de amaranto, cinco provenientes de Hungría y tres de México, todas con protección a derechos de obtentor, una variedad de Brasil y otra de México para evaluar la distinción, consideradas como candidatas. La caracterización morfológica se realizó de acuerdo a la guía TG/247/1 para la descripción varietal en amaranto, que consta de 40 caracteres. Para el examen de distinción, homogeneidad y estabilidad, se utilizó el sistema de agrupamiento del Servicio Nacional de Inspección y Certificación de Semillas. en el agrupamiento de variedades, resultó que ocho de diez variedades cumplen con la distinción, pero dos (Roza y BRS-Alegría) no cumplen porque resultan morfológicamente parecidas. Las variedades Maros y Eniko resultaron iguales; no obstante, ambas muestran rasgos que las distinguen, la variedad Maros expresa pigmentación en el utrículo en la fase de llenado de grano; además 10% de las inflorescencias muestran manchas irregulares de color rojo conocida como variegación. Por otra parte, del 25 al 40% de las plantas presentan pigmentación en la base del tallo; con respecto a la homogeneidad, las variedades expresaron en cada ambiente los caracteres que las definen; sin embargo, aquellos que son cuantitativos con tipo de observación de medición de varias plantas o partes de plantas individuales, no cumplen con la estabilidad. Se evaluaron seis caracteres a través del análisis combinado interanual de distinción, destacando que la calificación que se otorga a los caracteres tomados en campo, no corresponden a la diferenciación de una variedad. This study was carried out in order to value procedures for the evaluation of the distinctness, uniformity and stability in plant varieties, so as to protect the obtainer's rights, and it was carried out in two spring-summer agricultural cycles in 2006 and 2007 in experimental fields at Colegio de Postgraduados en Ciencias Agrícolas. Ten amaranth varieties were used, five from Hungary and one from Mexico, all with the protection of the obtainer's rights, one variety from Brazil and another one from Mexico, to evaluate the distinction, considered as candidates. Morphological characterization was carried out according to the guide TG/247/1 for the varietal descript
Caracterización de líneas de jitomate en hidroponía
Ramos Ortega, Adriana;Carballo Carballo, Aquiles;Hernández Livera, Adrián;Corona Torres, Tarsicio;Sandoval Villa, Manuel;
Agricultura técnica en México , 2006,
Abstract: tomato (lycopersicon esculentum l.) is an important horticultural crop in mexico due to a large area planted and economic value. the objective of this study was to select lines that can be used as parents of hybrids on the basis of superior traits in pollen, flower, seed, fruit and seedling morphology. the research was conducted in montecillo, texcoco, state of mexico. during 2003 the seed increase of 21 lines of tomato was carried out under an hydroponic system; in 2004 a trial with 16 lines selected from the 21 were utilized to carry out a morphological characterization under greenhouse and laboratory. data on flower, fruit, seed and plants were analyzed by means of an anova and a tukey test (p 0.05), and for the data on pollen grains a principal component analysis was performed. results indicated differences among tomato lines in traits such as easiness for flower emasculation and in the efficiency for the production of pollen and seeds. the pca separated the sixteen lines in five groups and out of six traits, the area and main axes length of pollen grains were choosen and could be used as a selection criteria to be used in breeding programs; lines 2-4, 8-9, 5-11, 8-12, 3-12, 3-6, 5-7 and 7-12 were selected as parents on the basis of high production of fruits, pollen and seed.
Efecto de la dispersión de polen en la producción de semilla de maíz, en Texcoco, México
Ortiz-Torres,Enrique; Carballo-Carballo,Aquiles; Mu?oz-Orozco,Abel; Félix Valerio,González-Cossio;
Agronomía Mesoamericana , 2010,
Abstract: effect of pollen dispersion in corn seed production, in texcoco, méxico. in order to find out how the pollen of corn is dispersed in a seed production field without isolation, and the implications on genetic quality of the seed, a field test was established (189 m long by 42.5 m wide) during spring-summer season of 1992 in texcoco, mexico. three corn populations with contrasting endosperm composition were planted: two of normal field corn and other of sweet corn. the sweet corn variety was surrounded by three rows of the normal corn varieties. the variables measured were plant and ear length, male and female flowering period, percent of normal grain as indicator of the cross of the normal type varieties over the sweet type. lack of physical isolation and coincidence of flowering periods favored crossing of the varieties. pollen dispersion and contamination within the field followed a normal distribution; there were variations in the distance and level of contamination due to wind direction and vigor differences of contaminant plants. the lowest grade of contamination was 1% in the central part of the field. according to the response surface obtained, 25 border rows are recommended to obtain seed free of contamination.
EFECTO DE LA DISPERSIóN DE POLEN EN LA PRODUCCIóN DE SEMILLA DE MAíZ, EN TEXCOCO, MéXICO
Enrique Ortiz-Torres,Aquiles Carballo-Carballo,Abel Mu?oz-Orozco,Félix Valerio González-Cossio
Agronomía Mesoamericana , 2010,
Abstract: Con la finalidad de conocer cómo se dispersa el polen de maíz en un lote de producción de semillas con problemas de aislamiento y sus implicaciones en la calidad genética, se condujo un experimento en un lote de 189 por 42,5 m en el ciclo primaveraverano de 1992 en Texcoco, México. Se establecieron tres poblaciones de maíz contrastantes en la composición del endospermo: dos de tipo normal y una de tipo dulce. Las variedades de tipo normal estuvieron colocadas en tres surcos rodeando a la variedad dulce. Se evaluó la altura de planta y mazorca, floración femenina y masculina; además, el porcentaje de grano con endospermo normal, como indicativo del cruzamiento ocurrido en la variedad de endospermo dulce. Las condiciones que facilitaron el cruzamiento con las variedades de endospermo normal fueron la inexistencia de aislamiento por distancia y coincidencia de las floraciones. La dispersión de polen y subsecuente contaminación dentro del lote siguió una distribución normal; existieron variaciones en los niveles y distancias de contaminación debidas a la dirección de los vientos y en el vigor de las plantas contaminantes. La menor contaminación fue 1% que se presentó en el centro del lote. La ecuación de superficie de respuesta obtenida estimó que con 25 surcos borderos es posible obtener una calidad de semilla sin contaminación.
Diferenciación de dos líneas de to-mate y su híbrido con marcadores moleculares
Carlos Su00E1nchez Abarca,Aquiles Carballo Carballo,Fernando Castillo Gonzu00E1lez
Revista fitotecnia mexicana , 2003,
Abstract: El presente trabajo se realizó en el Laboratorio de Biología Molecular, de la Universidad Autónoma Chapingo, durante el a o de 1996, con el propósito de establecer diferencias y similitudes genómicas de dos líneas de Lycopersicon esculentum Mill. (13-Nar de hábito indeterminado y THE-309 de hábito determinado) y el híbrido resultante de la cruza de ambas, mediante la técnica RAPD. Un total de 101 bandas de ADN que se obtuvieron con seis iniciadores aleatorios de la serie G de Operon, fueron analizadas en el programa NTSYS pc2, con el coeficiente de similaridad genética de agrupamiento simple. El dendrograma respectivo se realizó con el método de agrupamiento UPGMA. Las huellas de ADN generadas con los RAPDs permitieron diferenciar claramente entre y dentro de las poblaciones analizadas.
SEMILLA DE MAíZ BAJO LA INFLUENCIA DE IRRADIACIóN DE CAMPOS ELECTROMAGNéTICOS
Arturo Domu00EDnguez Pacheco,Claudia Hernu00E1ndez Aguilar,Alfredo Cruz Orea,Aquiles Carballo Carballo
Revista fitotecnia mexicana , 2010,
Abstract: La energía electromagnética actúa sobre la materia e interrelaciona con los organismos biológicos, en cada etapa de desarrollo desde la germinación, y por ello puede ser una técnica de bajo costo para mejorar la calidad de semilla. En esta investigación se evaluó el efecto de la irradiación electromagnética sobre la calidad fisiológica de la semilla de maíz (Zea mays L.), del híbrido experi-mental 'CL-11 x CL-12', con un campo electromagnético de baja frecuencia. Se compararon 12 tratamientos de campos magnéticos, con intensidades de 160 y 560 mT y siete tiempos de exposición (t) de 0, 30, 60, 120, 240, 360 y 480 min, en un dise o experimental de bloques completos al azar con cuatro repeticiones. Hubo diferencias estadísticas significativas en la velocidad de emergencia y porcentaje de establecimiento de plántulas al cuarto día, y al día 17 en el peso seco. Se detectó bioestimulación positiva con exposición de 30 y 60 min a una intensidad de 560 y 160 mT (dosis de 705.6 y 27.42 K J m-3 s-1, respectivamente). Con la dosis de 705.6 K J m-3 s-1 hubo un incremento significativo de 69.2 % en comparación con el testigo en velocidad de emergencia, de 90.5 % en establecimiento de plántulas y de 36.6 % en peso seco.
Calidad fisiológica en semillas de maíz con diferencias estructurales
Pérez de la Cerda, Felipe de Jesús;Carballo Carballo, Aquiles;Santacruz Varela, Amalio;Hernández Livera, Adrián;Molina Moreno, Juan Celestino;
Agricultura técnica en México , 2007,
Abstract: fifty-six single crosses of maize (zea mays l.) with different type of endosperm, from floury to horny types were evaluated with the aim of establishing the relationship between the structural seed characteristics and physiological seed quality. the study was carried out during 2001 in the colegio de posgraduados at montecillo, state of mexico. tests were carried out on industrial quality: texture as determined by dissection to determine percentages of pedicel, pericarp, germ, floury starch and horny starch; and physiological quality tests: standard germination test, cold and a vigor te st in a microtunnel using seeds with and without accelerated aging. results showed differential response among genotypes, increasing vigor and physiological quality as the proportion of horny endosperm increased. a high and positive correlation between germ and horny endosperm was reflected in a higher dry weight of both shoot and root in the cold and the standard germination tests, which indicates higher vigor. from the test conducted in the microtunnel a high correlation was found between horny endosperm and dry weight of both shoot and root and rate of emergency. a canonical correlation analysis, with data from standard germination and cold tests confirmed the main conclusion of this study in the sense that a large expression of vigor corresponds to genotypes with horny endosperm.
Acondicionamiento osmótico de semillas de cebolla (Allium cepa L.)
Marín Sánchez, José;Mejía Contreras, José Apolinar;Hernández Livera, Adrián;Carballo Carballo, Aquiles;Pe?a Lomelí, Aureliano;
Agricultura técnica en México , 2007,
Abstract: the osmotic conditioning of seeds, also known as osmopriming or priming is considered a promising technique to improve seed germination, resulting in a rapid and synchronous seedling emergence (invigoration). the objective of the present work was to evaluate the effect of osmopriming on the physiological quality of onion seeds after four storage periods. seeds of onion cv. "early supreme" were osmoprimed with kno3, kcl and polyethylene glicol (peg-8000) at -5, -10, -15 and -20 atm for 48, 72 and 96 h. primed seeds were stored at 10 °c during 0, 7, 90 and 180 days. after each storage period a standard germination test was performed. the parameters evaluated were: percentage of germination, abnormal seedlings, dead seeds, 50% germination and seedling dry weight. results showed higher invigoration in plantlets from untreated control treatment. in comparison with other tested treatments priming with peg-8000 at -5 atm for 48 and 72 h improved seed physiological quality, quality that persisted all storage periods.
Fertilización nitrogenada y características físicas, estructurales y calidad de nixtamal-tortilla del grano de híbridos de maíz
Zepeda Bautista, Rosalba;Carballo Carballo, Aquiles;Mu?oz Orozco, Abel;Mejía Contreras, José Apolinar;Figueroa Sandoval, Benjamín;González Cossio, Félix Valerio;
Agricultura técnica en México , 2007,
Abstract: the objective of this study was to evaluate the effect of two nitrogen fertilization levels, 150 and 300 kg ha-1 applied throughout fertigation on physical, structural and alkaline cooking quality characteristics of the grain of a group of 10 corn hybrids including hard, medium and soft seeded, and to identify those that meet the standards of the industry. twenty samples of grain harvested in october 2002 in the colegio de postgraduados (cp), montecillo, state of mexico, mexico and they were analyzed in february 2003 in the instituto nacional de investigaciones forestales, agrícolas y pecuarias (inifap), chapingo, state of mexico, mexico for: 1) physical characteristics: hectolitric weight, flotation index and grain color, 2) structural components: percentage of pedicel, pericarp and germ, 3) alkaline cooking characteristics: moisture content of "nixtamal" and "tortilla", loss of solids, retained pericarp, color and yield of dough and tortilla. for data analyses a completely random design was used. average from all hybrids, in comparison with 150 kg ha-1 of n, the fertilization with 300 kg ha-1 increased pericarp, germ and solid losses in 6.2, 5.0 and 2.4%, respectively; flotation index, pericarp loss (after lime-cooking) and grain color (reflectance) decreased 10.0, 9.4 and 2.2%, respectively and indirectly enhanced the white color of the dough and tortilla. in the hybrid cs 2*10 dough and tortilla yield was increased in 11.7 and 13.2%, respectively; hybrids cs 3*9 and cs 6* 10 showed a decrease in the flotation index of 19.5 and 10.5%, respectively. hybrids cs 3*4, cs 3*9 and cs 2*5 meet the standards for tortilla production and cs 3*9, cs 6*10, cs 10*3, cs 2*10 meet those of the alkaline-cooking flour industry. the results showed that nitrogen fertilization modified in different proportions, alkaline-cooking tortilla and flour quality of hard, intermediated and soft corn grains.
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