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| Registros recuperados: 443 | |
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| Cano Estrada,Araceli; Vélez Díaz,Daniel; Morgado Hernández,Carlos Alberto. |
| Over the past several decades, technological developments and modernization have grown concomitantly.For example, advances in biotechnology have been used as a tool to increase food production. Specifically, advances in genetic engineering have made possible the manipulation of crops to increase yield, guaranteeing food supplies for the increasing world population. However, transgenic crops have not been well received by all members of society, and there is still uncertainty about their social benefits and the possible implications to human health. Additionally, the benefits of agricultural modernization have favored only developed countries, whereas people living in developing and underdeveloped countries suffer rampant hunger, malnutrition and poverty.... |
| Tipo: Journal article |
Palavras-chave: Agriculture; Development; Food industry; Nutrition; Organic food; Transgenic food. |
| Ano: 2017 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202017000100001 |
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| Latorre,Bernardo A; Torres,René; Silva,Tatiane; Elfar,Karina. |
| B.A. Latorre, R. Torres, T. Silva, and K. Elfar. 2013. Evaluation of the use of wound-protectant fungicides and biological control agents against stem canker (Neofusicoccum parvum) of blueberry. Cien. Inv. Agr. 40(3): 537-545. Economically, blueberry (Vaccinium corymbosum) has become a very important fruit crop in Chile, and stem canker (Neofusicoccum parvum) has frequently been observed as a major disease. The symptoms are characterized by partial or total death of the foliage associated with extensive reddish-brown canker lesions at the base of the stems. Pruning wounds appear to be the main infection route. In this study, fungicide pastes and biological control agents were evaluated for their effectiveness as pruning wound-protectants against N. parvum.... |
| Tipo: Journal article |
Palavras-chave: Botryosphaeria canker; Biological control; Boric acid; Ascorbic acid; Vaccinium corymbosum. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000300007 |
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| Mora,Freddy; Perret,Sandra; Scapim,Carlos Alberto; Nunes Martins,Elias; Molina,María Paz. |
| Se analizó la variabilidad en el florecimiento de cinco poblaciones de Eucalyptus cladocalyx establecidos en la Región de Coquimbo. Se consideró al florecimiento como una respuesta binaria medida a los 30 meses de edad. Por lo tanto, se ajustó un modelo linear generalizado para analizar el efecto de procedencias. Posteriormente, se estudió la variabilidad genética dentro de la mejor procedencia, a través de inferencia Bayesiana, vía algoritmo de Gibbs. Inicialmente, se consideraron dos sitios, Hacienda Caracas y Tunga Norte, sector costero e interior de la Provincia de Choapa, respectivamente. En el sector costero, sólo un 1,33% de los árboles presentaron eventos de florecimiento, mientras que en Tunga Norte, este valor fue de 23,43%. Debido a este... |
| Tipo: Journal article |
Palavras-chave: Ambientes áridos; Árboles multipropósito; Eventos de florecimiento; Mejoramiento; Procedencias. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202007000200006 |
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| Cáceres,Pablo; Cordero,Cecilia; González,Gloria; Quiroz,Karla; Bobadilla,Juan C; Bravo,Carmen; Caligari,Peter D.S; Carrasco,Basilio; García-Gonzales,Rolando. |
| A lysis buffer-based protocol (Protocol BA), a modified lysis buffer-based protocol (Protocol BA Mod) and a commercial extraction kit (Protocol PS Kit) (Power Soil, Mo bio Laboratories, CA USA) were each evaluated for their ability to produce high-quality DNA with yields sufficient to allow its use in biodiversity studies. Similarly, the effect of liquid nitrogen on the process of cell disruption in all of the protocols that were studied. DNA yields ranged from 12.4 ng g-1 of processed soil to 9620 ng g-1 using the modified lysis buffer and commercial extraction kit, respectively. The quality of the DNA was determined by the ability of the DNA to produce efficient and reproducible polymerase chain reaction (PCR) products, using primers for universal 16S... |
| Tipo: Journal article |
Palavras-chave: Hydrophilic forests; 16S ribosomal RNA; PCR; Rhizosphere; Soil DNA extraction. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000300018 |
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| Schnettler,Berta L; Rebollo,Alfonso. |
| La desigual distribución del equipamiento comercial provoca desplazamientos de compra desde los centros de menor tamaño hacia los de mayor dotación comercial, provocando evasiones de gasto comercializable o flujos comerciales. Para determinar el efecto de variables de atracción y de restricción en los flujos comerciales de alimentos en las regiones VIII, IX y X de Chile, se estimó el modelo de gravitación tradicional. Los atributos de los centros de compra fueron población, ingreso monetario mensual de los hogares, cantidad de patentes y la superficie comercial de establecimientos de venta de alimentos. Como variable de restricción se utilizó la distancia y el tiempo de desplazamiento. Los consumidores que realizan desplazamientos de compra fuera de la... |
| Tipo: Journal article |
Palavras-chave: Áreas comerciales; Desplazamientos de compra; Gravitación comercial. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202007000200002 |
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| Campos-Vargas,Reinaldo; Zamora,Pablo; Contreras,Rodrigo; Köhler,Hans; Zúñiga,Gustavo E; Pérez-Donoso,Alonso; Defilippi,Bruno G. |
| Table grape (Vitis vinifera L.) quality includes the condition of both the berries and the rachis. In the present report, physiological parameters of Red Globe rachises from fully elongated inflorescences (RFEI) and from mature clusters were studied after storage at 0 or 20 °C for different durations. To understand changes in rachis physiology as a result of changes in temperature conditions and storage time, the activities of superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX) were measured. In addition, hydrogen peroxide content, membrane lipoperoxidation (TBARS), total phenolic compounds and antioxidant capacity (FRAP) were assayed. TBARS was higher in mature rachises than in RFEI. This parameter remained constant throughout... |
| Tipo: Journal article |
Palavras-chave: Fruit quality; Rachis; Storage; Table grape; Vitis vinifera L. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000100007 |
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| Toral,Manuel; Bown,Horacio E; Mañon,Alejandro; Alvarez,José; Navarro-Cerrillo,Rafael. |
| The toppling of young trees considerably reduces the value of the first log in Pinus radiata plantations. Although wind is the main cause of toppling, the quality and type of plants, planting techniques, soil fertility and soil preparation may play an important role in the susceptibility of the species to toppling. This article analyzes the influence of ripping and soil type on the probability of P radiata toppling after severe windstorms in central south Chile. To this aim, pairs of similar trees with and without toppling were selected in 2001 in six soil types with and without soil ripping. Root system differences in toppled versus straight trees were compared to gain better insight into the causes of the phenomenon. Among all root measurements, the... |
| Tipo: Journal article |
Palavras-chave: Ripping; Soil fertility; Tap root; Toppling. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000300010 |
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| Bastías,Adriana; Almada,Rubén; Rojas,Pamela; Donoso,José Manuel; Hinrichsen,Patricio; Sagredo,Boris. |
| A. Bastías, R. Almada, P. Rojas, J.M. Donoso, P. Hinrichsen, and B. Sagredo. 2016. Aging gene pathway of microRNAs 156/157 and 172 is altered in juvenile and adult plants from in vitro propagated Prunus sp. Cien. Inv. Agr. 43(3):429-441. In vitro culture is a very popular technique to mass propagate valuable plant genotypes, including Prunus sp. cultivars. Plants that undergo tissue culture processes often change their morphology and behavior due to the "rejuvenation" caused by the plant growth regulators included in the medium. To evaluate the effects of rejuvenation by tissue culture in Prunus sp., the expression patterns of the aging gene pathway described in plant models, which include the highly conserved microRNA (miRNA or miR) 156/157 and 172... |
| Tipo: Journal article |
Palavras-chave: Development; In vitro culture; Hase change; Rejuvenation. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202016000300009 |
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| Toledo,Dayand; Parra,Leonardo; Mutis,Ana; Ortega,Fernando; Hormazábal,Emilio; Quiroz,Andrés. |
| The contents of long-chain fatty acids in non-polar root extracts from 1.6 year-old red clover plants of two cultivars (Superqueli INIA and Quiñequeli INIA) and one experimental line (Syn II Pre III), their relationships with H. obscurus populations, and the stimulant or deterrent effects of the root extracts and of individual fatty acids on the weight gain of H. obscurus were investigated. There was an inverse relationship between the insect population size and the palmitic acid content. The Superqueli INIA cultivar contained the highest palmitic acid content and the lowest insect load. When solutions of either palmitic or oleic acids were individually incorporated into an artificial diet, palmitic acid caused a decrease in weight gain, whereas the effect... |
| Tipo: Journal article |
Palavras-chave: Deterrent; Hylastinus obscurus; Trifolium pratense; Palmitic acid. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000300008 |
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| Arnhold,Emmanuel; Soriano Viana,José Marcelo; Mora,Freddy; Vieira Miranda,Glauco; Gonçalves Silva,Ricardo. |
| The aim of the study was to assess inbreeding depression and determine genetic components in landrace populations of popcorn. Six Brazilian popcorn landraces: Amarelo, Beija-Flor, Branco, Rosa-claro, Roxo and Viçosa, were subjected to self-pollination. Experiments with SO populations and their selfing populations (SI) were conducted in a randomized complete block design. The estimates of inbreeding depression varied from 1.2% (popping expansion) to 79% (grain yield). The gene action was predominantly additive for plant height, ear height and hundred-grain-weight. The dominance genetic effects were important for index of prolificacy and grain yield. The genetic effect of popping expansion was bidirectional with nuil dominance and a predominance of additive... |
| Tipo: Journal article |
Palavras-chave: Zea mays L; Mprovement; Popping expansion; Popcorn; Genetic variance. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000300011 |
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| López,Liliana; Santamaría,Johanna; Sánchez,Alexandra; Castro,Lida; Moreno,Jessica L. |
| This study assessed the presence of tetracycline-resistant bacteria in five different grassland-based production systems dedicated to raising dairy cattle located in the Colombian Andes. Animal (ruminal fluid and feces) and environmental (soil and water) samples were evaluated, and resistant heterotrophic bacteria were found in rumen fluid, feces, soil, and runoff water samples. The resistant bacteria were isolated and identified based on the 16S rDNA region. Subsequently, they were evaluated for the presence of tet genes, which encode ribosomal protection proteins and membrane efflux pumps. The most frequent phyla detected were Firmicutes and Proteobacteria. The most common resistance genes found were tet(W), tet(Q), and tet(M). The nucleotide sequences... |
| Tipo: Journal article |
Palavras-chave: Antimicrobial resistance; Cattle farms; Colombian Andes; Environmental pollution; Tetracycline. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000300002 |
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| Mujica,María Valentina; Mora,Roxana; Rosales,Marlene; Sandoval,Claudio. |
| A vineyard in south-central Chile was surveyed during five growing seasons to analyze the increase over time in the number of plants infected with Grapevine leafroll-associated virus-1, -2 and -3. At the end of the study, GLRaV-3 was found to be the most prevalent virus, with 46% of plants infected by this pathogen. GLRaV-2 infected 13% of plants, and GLRaV-1 infected 12%. Considering all three viruses together, the prevalence of infection increased exponentially from 14% of the plants at the beginning of the study period to 68% at the end. The patterns of the spread of GLRaV-2 and GLRaV-3 were mostly along the rows, whereas the pattern of spread for GLRaV-1 could not be determined. |
| Tipo: Journal article |
Palavras-chave: Field transmission; Grapevine leafroll-associated virus; GLRaV-1; GLRaV-2; GLRaV-3; Virus diagnosis. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000100012 |
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| Guzman,Gonzalo; Latorre,Bernardo A; Torres,Rene; Wilcox,Wayne F. |
| Crown gall (Agrobacterium tumefaciens) and Phytophthora root and crown rot (PRCR), caused by P. cryptogea, are two major limiting factors affecting peach (Prunus pérsica) production in Chile. At present, Nemaguard is the most important rootstock used in peach orchards, and although several clonal rootstocks are under development worldwide, there is little information regarding their susceptibility to crown gall and PRCR. Therefore this investigation was undertaken to study the susceptibility to A. tumefaciens and P. cryptogea of the clonally propagated rootstocks Cadman®-Avimag (P. pérsica x P. davidiana), Mr.S 2/5 (P. cerasifera x P. spinosa), Viking ([P. pérsica x P. davidiana] x [P. dulcís 'Jordanolo'x P. blireiana]), and Nemaguard (P. pérsica x P.... |
| Tipo: Journal article |
Palavras-chave: Agrobacterium tumefaciens; Disease control; Nectarines; Rootstock resistance. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202007000100004 |
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| Ferreira Ozela,Eliana; Stringheta,Paulo César; Cano Chauca,Milton. |
| The stability of anthocyanin in the extract of spinach vine fruit (Basella rubra L.) was studied in relation to degradative factors such as light, temperature and pH acting alone or in combination. In this work, the possible use of spinach vine fruit as a source of natural pigments for use in food coloring was evaluated. Extraction of the pigment was carried out with 99.9% methanol at pH 2.0. The stability of the anthocyanin extract was estimated. From these values, reaction velocity constants (k) as well as the half-life time (t l;2) were calculated at pH 4.0, 5.0, and 6.0 in the presence and absence of light both at 40 and 60°C. Results indicate that, independent of pH values, spinach vine extract suffered an interference of light in its anthocyanin... |
| Tipo: Journal article |
Palavras-chave: Anthocyanin; Bertalha; Coloring; Food color; Spinach vine. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202007000200004 |
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| Registros recuperados: 443 | |
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