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Search Results: 1 - 10 of 130424 matches for " V.; Odorizzi "
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Validación de un método de selección para rendimiento en alfalfa basado en la depresión por endocría
Arolfo,V.; Odorizzi,A.; Basigalup,D.; Balzarini,M.;
Agriscientia , 2011,
Abstract: rapid inbreeding depression in alfalfa is due to loss of intraallelic interactions in tri- and tetraallelic plants. these plants could be identified by using a s1 progeny test and then combined into a higher yielding synthetic variety. the objective of this study was to evaluate the usefulness of s1 progeny test to identify tri and tetraallelic genotypes. three alfalfa synthetic experimental populations (pse) were developed by applying three selection methods to an original plant population (po). the first one, selected those plants whose s1 progenies exhibited higher inbreeding depression (≥65%) on forage production; the second one, selected the plants of the po that did not produce s1 seed; the last one, consisted on traditional phenotypic selection of po plants with higher forage yield (15% superior). the elite were manually intercrossed and harvested to produce pse 1, 2 and 3, respectively. accumulated forage yield was analyzed for each pse and po during the season. all the pse produced more (p<0.05) than the po; however, pse 1 was no different from pse 3. data were also used to estimate variance components. the heritability (h) reached a value of 0.86.
Análisis de la variabilidad de caracteres de raíz en poblaciones de alfalfa (Medicago sativa L.) con alto número de raíces laterales
Odorizzi,A.; Basigalup,D.; Arolfo,V.; Balzarini,M.;
Agriscientia , 2008,
Abstract: in order to provide some level of tolerance to the alfalfa root curculio in argentina, the improvement directed to increasing the number of secondary roots could be important. the objectives of this work were to estimate under four environmental conditions, variance components, trait heritabilities (h) and correlations among aerial and root traits in 10 alfalfa populations ranging from 6 to 9 fall dormancy, obtained by the alfalfa breeding program at the exp. stn. of manfredi- inta. the evaluated traits were average forage yield per cut (bp), taproot diameter (dp), number of lateral roots (nrlr), lateral root diameter (drlr) and branched-type root system (r). considerable variation for all traits was detected across all environments. there was no correlation between bp and most of root traits in almost every environmental condition, indicating that selection for yield and root traits could be independently managed. under irrigation, dp was positively (r =0,47; p<0,01) correlated with bp. both drlr and nrlr exhibited little variability and appeared to be little or not influenced by the environment. non-dormant populations had the lowest number of secondary roots, while the moderately-dormant populations presented the highest numbers. r reached a much higher expression under dryland conditions than under irrigation. bp and dp had high h values.
Análisis de la variabilidad de caracteres de raíz en poblaciones de alfalfa (Medicago sativa L.) con alto número de raíces laterales Root traits variability in alfalfa (Medicago sativa L.) populations with a high number of lateral roots
A. Odorizzi,D. Basigalup,V. Arolfo,M. Balzarini
Agriscientia , 2008,
Abstract: Para atenuar el da o provocado por los gorgojos de la alfalfa en la Argentina, el mejoramiento orientado al aumento del número de raíces laterales puede ser importante. Los objetivos de este trabajo fueron estimar bajo cuatro condiciones ambientales, componentes de varianza, heredabilidad en sentido amplio (H) y correlaciones entre biomasa aérea y caracteres de raíz en 10 poblaciones de alfalfa de grado 6 a 9 de reposo invernal, mejoradas por sistema de raíz ramificada en la E.E.A. Manfredi-INTA. Los caracteres evaluados fueron: rendimiento de biomasa promedio (BP), diámetro de raíz pivotante (DP), número de raíces laterales (NRLR), diámetro de raíces laterales (DRLR) y sistema radicular tipo ramificado (R). Hubo ausencia de correlación entre BP y los caracteres de raíz en la mayoría de los ambientes, indicando que se debe seleccionar por ambos caracteres en forma específica e individual. En ambientes con riego, DP fue el que más se correlacionó con BP (r =0,47; p <0,01). DRLR y NRLR no presentaron gran variabilidad y serían los menos influenciados ambientalmente. Las poblaciones sin reposo invernal presentaron menor grado de ramificación que aquellas con reposo invernal intermedio. R se expresó en menor medida bajo riego que en secano. BP y DP tuvieron los mayores valores de H. In order to provide some level of tolerance to the alfalfa root curculio in Argentina, the improvement directed to increasing the number of secondary roots could be important. The objectives of this work were to estimate under four environmental conditions, variance components, trait heritabilities (H) and correlations among aerial and root traits in 10 alfalfa populations ranging from 6 to 9 fall dormancy, obtained by the alfalfa breeding program at the Exp. Stn. of Manfredi- INTA. The evaluated traits were average forage yield per cut (BP), taproot diameter (DP), number of lateral roots (NRLR), lateral root diameter (DRLR) and branched-type root system (R). Considerable variation for all traits was detected across all environments. There was no correlation between BP and most of root traits in almost every environmental condition, indicating that selection for yield and root traits could be independently managed. Under irrigation, DP was positively (r =0,47; p<0,01) correlated with BP. Both DRLR and NRLR exhibited little variability and appeared to be little or not influenced by the environment. Non-dormant populations had the lowest number of secondary roots, while the moderately-dormant populations presented the highest numbers. R reached a much higher expression under dryla
Evaluación de da o de gorgojos en poblaciones de alfalfa (Medicago sativa L.) con alto número de raíces laterales Evaluation of root curculio/weevil damage in alfalfa (Medicago sativa L.) populations with large numbers of lateral roots
A. S. Odorizzi,V. Arolfo,D. H. Basigalup
Agriscientia , 2011,
Abstract: El aumento del número de raíces laterales a través del mejoramiento puede ser importante para reducir el da o provocado por el complejo de gorgojos de la alfalfa. El objetivo fue evaluar, en cuatro ambientes (siembras de oto o y primavera con y sin riego), el comportamiento de 10 poblaciones seleccionadas por alto número de raíces laterales. Los caracteres evaluados fueron: categoría (Cat) de da o de gorgojos (de 1 = sin da o a 5 = da o severo), rendimiento promedio de forraje (BP), número de raíces secundarias (NRLR) y diámetro de raíces laterales (DRLR). Las poblaciones s755, s545 y s614 presentaron los mayores valores de DRLR y NRLR, el menor da o de gorgojos (Cat 2+3) y la mayor variabilidad para los caracteres estudiados. Las poblaciones s545 y s616 exhibieron el mayor DRLR y el menor NRLR, respectivamente. Las condiciones de riego propiciaron un menor da o, y fueron menos afectadas en estos ambientes las poblaciones s545, s614 y s617; por el contrario, las poblaciones s461, s755, s463 resultaron las más afectadas. Los da os más severos (Cat 4+5) se observaron en secano y las poblaciones s618 y s616 fueron las más afectadas; sólo bajo estas condiciones el mayor da o se correlacionó con menor BP. Increasing the number of lateral roots through breeding may be important to reduce the damage caused by the root curculio complex in alfalfa in Argentina. The objective was to evaluate the performance of ten alfalfa experimental populations selected for their large number of lateral roots under four environmental conditions (fall and spring planting with or without irrigation). The evaluated traits were curculio damage (Categories (Cat) 1 = no damage to 5 = very severe damage), dry matter yield (BP), number of secondary roots (NRLR), and diameter of lateral roots (DRLR). Populations s755, s545 and s614 had the highest values for DRLR and NRLR, the least damage from weevil (Cat 2 +3), and the largest variability (mean square) for all the traits. Populations s545 and s616 exhibited the highest DRLR and the lowest NRLR, respectively. Irrigation conditions led to lesser curculio damage, with populations s545, s614 and s617 being the least affected, and populations s461, s755 and s463, the most affected. The highest damage (Cat 4 +5) was observed under rainfed conditions (dryland), with populations s618 and s616 as the most affected by the root curculio complex. Only under these conditions the highest curculio damage was correlated with lowest BP.
Validación de un método de selección para rendimiento en alfalfa basado en la depresión por endocría Validation of a selection technique for improving alfalfa forage yield based on inbreeding depression
V. Arolfo,A. Odorizzi,D. Basigalup,M. Balzarini
Agriscientia , 2011,
Abstract: La rápida depresión por endocría en alfalfa obedece a la pérdida de interacciones alélicas intra-locus en plantas tri y tetraalélicas. éstas podrían identificarse por una prueba de autofecundación y luego combinarse en una variedad sintética con mayor rendimiento forrajero. El objetivo de este trabajo fue evaluar la utilidad de la prueba de progenie S1 para identificar genotipos tri y tetraalélicos. Se desarrollaron tres poblaciones sintéticas experimentales (PSE) de alfalfa según tres métodos de selección, partiendo de una población original (PO). El primero, seleccionando las plantas madres que presentaron mayor depresión por endocría (≥65%) en el rendimiento de sus progenies S1; el segundo, seleccionando las plantas de la PO que no formaron semilla S1; el último consistió en la selección fenotípica tradicional de las plantas de la PO con mayores rendimientos (15% superior). Las seleccionadas fueron polinizadas y cosechadas manualmente, conformando las PSE 1, 2 y 3, respectivamente. Se evaluó la producción de forraje acumulada de cada PSE y PO durante la temporada. Todas las PSE superaron (p<0,05) a la PO, aunque la PSE 1 no se diferenció estadísticamente de la PSE 3. Se estimaron los componentes de la varianza. La heredabilidad (H) alcanzó un valor de 0,86. Rapid inbreeding depression in alfalfa is due to loss of intraallelic interactions in tri- and tetraallelic plants. These plants could be identified by using a S1 progeny test and then combined into a higher yielding synthetic variety. The objective of this study was to evaluate the usefulness of S1 progeny test to identify tri and tetraallelic genotypes. Three alfalfa synthetic experimental populations (PSE) were developed by applying three selection methods to an original plant population (PO). The first one, selected those plants whose S1 progenies exhibited higher inbreeding depression (≥65%) on forage production; the second one, selected the plants of the PO that did not produce S1 seed; the last one, consisted on traditional phenotypic selection of PO plants with higher forage yield (15% superior). The elite were manually intercrossed and harvested to produce PSE 1, 2 and 3, respectively. Accumulated forage yield was analyzed for each PSE and PO during the season. All the PSE produced more (p<0.05) than the PO; however, PSE 1 was no different from PSE 3. Data were also used to estimate variance components. The heritability (H) reached a value of 0.86.
Flebotomíneos de várzea do rio Aguapeí, regi?o noroeste do Estado de S?o Paulo, Brasil
Odorizzi,Rosa M F N; Galati,Eunice A B;
Revista de Saúde Pública , 2007, DOI: 10.1590/S0034-89102007000400020
Abstract: objective: to investigate the seasonal variation of sand flies regarding their occurrences and densities. methods: the study was conducted in the aguapeí river floodplain in the state of s?o paulo, southeastern brazil. sand flies were monthly captured with automatic light traps set up between 18:00 and 7:00 hours, over a period of one year (2004-2005), at two sites: veranda of a domicile and in a forest on the banks of aguapeí river. the williams' average was used for estimating the seasonal variation and the chi-square test for comparison. results: a total of 35,995 specimens were captured: five brumptomyia avellari, one psathyromyia (xiphomyia) hermanlenti and the rest nyssomyia neivai, which had the highest frequency during the winter. ps. hermanlenti is first recorded in state of s?o paulo. conclusions: the high density of nyssomyia neivai, a suspected vector of cutaneous leishmaniasis, points out to the risk of transmission of this disease in this setting, especially during drier periods of the year.
Presumptive binge eating disorder in type 2 diabetes mellitus patients and its effect in metabolic control
Sandra Soares Melo,Cíntia Milene Comelli Odorizzi
Einstein (S?o Paulo) , 2009,
Abstract: Objective: This study sought to determine the presence of diagnosis suggestive of binge eating disorder in individuals with type 2 diabetes mellitus, and to evaluate the influence of such disorder on the metabolic control. Methods: sixty-three patients with type 2 diabetes mellitus and registered at the Diabetes and Hypertension Program of a Health Unit in the town of Balneário Camboriú, Santa Catarina, Brazil, were evaluated. The diagnosis of binge eating disorder was made by analysis of the Questionnaire on Eating and Weight Patterms – Revised. For the evaluation of metabolic control, 10 ml of blood was collected, and the serum glucose, glycated hemoglobin, tryglicerides, cholestrol and fractions were determined. Weight and height were determined for evaluation of national nutritional state, according to the body mass index. Rresults: Among the evaluated individuals, 29% presented a diagnosis suggestive of binge eating disorder, with higher prevalence among females. The individuals with diagnosis suggestive of binge eating disorder presented a higher average body mass index value than the group without diagnosis. The serum concentrations of glycated hemoglobin (p = 0.02) and triglicerides (p = 0.03) were statistically higher in the group with diagnosis suggestive of binge eating disorder. Cconclusions: Based on the results of this study, it is possible to conclude that the presence of binge eating disorder in individuals with type 2 diabetes mellitus favors an increase in body weight and has a negative influence on metabolic control, contributing to the early emergence of complications related to the disease.
LGR5 Is a Negative Regulator of Tumourigenicity, Antagonizes Wnt Signalling and Regulates Cell Adhesion in Colorectal Cancer Cell Lines
Francesca Walker, Hui-Hua Zhang, Annalisa Odorizzi, Antony W. Burgess
PLOS ONE , 2011, DOI: 10.1371/journal.pone.0022733
Abstract: Background LGR5 (Leucine-rich repeat-containing G-protein coupled receptor 5) is the most established marker for intestinal stem cells. Mouse models show that LGR5+ cells are the cells of origin of intestinal cancer, and LGR5 expression is elevated in human colorectal cancers, however very little is known about LGR5 function or its contribution to the stem cell phenotype and to colorectal cancer. Principal Findings We have modulated the expression of LGR5 by RNAi (inhibitory RNAs) or overexpression in colorectal cancer cell lines. Paradoxically, ablation of LGR5 induces increased invasion and anchorage-independent growth, and enhances tumourigenicity in xenografts experiments. Conversely, overexpression of LGR5 augments cell adhesion, reduces clonogenicity and attenuates tumourigenicity. Expression profiling revealed enhanced wnt signalling and upregulation of EMT genes upon knockdown of LGR5, with opposite changes in LGR5 overexpressing cells. These findings suggest that LGR5 is important in restricting stem cells to their niche, and that loss of LGR5 concomitant with activated wnt signalling may contribute to the invasive phenotype of colorectal carcinomas.
Relaciones entre propiedades físicas y químicas del suelo y raíces de alfalfa (Medicago sativa L.) afectada por "manchoneo"
Bonadeo,Elena; Hampp,Eugenio Ricardo; Bongiovanni,Marcos Darío; Moreno,Inés Selva; Odorizzi,Ariel;
Ciencia del suelo , 2006,
Abstract: the objective of this work was to evaluate the soil physical and physical-chemistries properties as related with the development of the alfalfa root system. two situations were studied: "normal" (n) and "patched" (m) growth. exchangeable sodium percentage (esp) and ph increase with the depth in n and m, being more noticeable in m. ph values of 9 occurred at 24 and 55 cm in m and n, respectively. the esp shows a similar tendency. in the period between november 2001 and april 2002, the highest measured electrical conductivity in n was 1.83 ds m-1 at 70 cm, and in m 3.92 ds m-1 at 30 cm. in 2001, the lower total root number and the shallower depth reached in m, were due to differences in the saline content mainly. this is probably due to the tolerance of the alfalfa to the high esp. in 2001, the roots length density until 30 cm, was significantly superior in n. in 2002 differences in the maximum depth were observed. it was concluded that there is a close relationship between the electrical conductivity of the soil and the evaluated root parameters.
Análise microbiológica de águas minerais e de água potável de abastecimento, Marília, SP
Alves,Nilton César; Odorizzi,Augusto Cesar; Goulart,Flávia Cristina;
Revista de Saúde Pública , 2002, DOI: 10.1590/S0034-89102002000700014
Abstract: the aim of this study was to evaluate the microbiological quality of different commercial mineral water brands, wells and reservoir supplies in surrounding areas of the city of marília, brazil, to determine the amount of total and fecal coliforms. eighteen samples of each source (mineral and reservoir supplies) were analyzed usingcolilert technique in cellophane. the results revealed that one sample of mineral water and one sample collected from the reservoir supply had been contaminated by a bacterium of the total coliform group, and there were found one bacterium/100 ml of water. none of the water samplesshowed contamination by fecal coliforms.
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