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Search Results: 1 - 10 of 20181 matches for " Nelcimar Reis;Rodrigues "
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Use of AFLPS to distinguish landraces of pejibaye (Bactris gasipaes) in brazilian Amazonia
Clement Charles R.,Sousa Nelcimar Reis,Rodrigues Doriane Pican?o,Astolfi-Filho Spártaco
Scientia Agricola , 2002,
Abstract: Although the first inhabitants of western Amazonia domesticated pejibaye (Bactris gasipaes Kunth, Palmae) or peach palm for its fruits, today it is widely planted for its heart-of-palm. Like other domesticates, pejibaye presents a complex hierarchy of landraces developed before the conquest of the Americas. The existence of three landraces (Pará, Solim es, Putumayo) was proposed along the Amazonas and Solim es Rivers, Brazil, based on morphological characteristics. There are some questions remaining about the intermediate landrace being an artifact of the morphometric analysis. AFLPs were used to evaluate the relationships among samples of these putative landraces. DNA was extracted from 99 plants representing 13 populations maintained in the Pejibaye Germplasm Bank, Manaus, AM; six primer combinations generated 245 markers via PCR, which were scored in an ABI Prism 310 sequencer and analyzed with GeneScan Software; Jaccard similarities were estimated and a dendrogram was generated with UPGMA. Two groups of plants were observed in the dendrogram instead of three, and were similar at 0.795. Each group contained two subgroups, similar at 0.815. One group (n=41) contained 73% Pará landrace plants, with one subgroup (n=22) containing 91% Pará, and the other (n=19) containing 53% Pará. The other group (n=58) contained 53% Solim es and 40% Putumayo landrace plants, with one subgroup (n=21) containing 52% Solim es and 43% Putumayo, and the other (n=35) containing 57% Solim es and 37% Putumayo. The first group confirmed the Pará landrace. The second group suggested that the Solim es landrace does not exist, but that the Putumayo landrace extends along the Solim es River to Central Amazonia.
Use of AFLPS to distinguish landraces of pejibaye (Bactris gasipaes) in brazilian Amazonia
Clement, Charles R.;Sousa, Nelcimar Reis;Rodrigues, Doriane Pican?o;Astolfi-Filho, Spártaco;Moreno, Yolanda Nú?ez;Pascual, Vicente Torres;Rodríguez, Francisco Javier Gallego;
Scientia Agricola , 2002, DOI: 10.1590/S0103-90162002000400019
Abstract: although the first inhabitants of western amazonia domesticated pejibaye (bactris gasipaes kunth, palmae) or peach palm for its fruits, today it is widely planted for its heart-of-palm. like other domesticates, pejibaye presents a complex hierarchy of landraces developed before the conquest of the americas. the existence of three landraces (pará, solim?es, putumayo) was proposed along the amazonas and solim?es rivers, brazil, based on morphological characteristics. there are some questions remaining about the intermediate landrace being an artifact of the morphometric analysis. aflps were used to evaluate the relationships among samples of these putative landraces. dna was extracted from 99 plants representing 13 populations maintained in the pejibaye germplasm bank, manaus, am; six primer combinations generated 245 markers via pcr, which were scored in an abi prism 310 sequencer and analyzed with genescan software; jaccard similarities were estimated and a dendrogram was generated with upgma. two groups of plants were observed in the dendrogram instead of three, and were similar at 0.795. each group contained two subgroups, similar at 0.815. one group (n=41) contained 73% pará landrace plants, with one subgroup (n=22) containing 91% pará, and the other (n=19) containing 53% pará. the other group (n=58) contained 53% solim?es and 40% putumayo landrace plants, with one subgroup (n=21) containing 52% solim?es and 43% putumayo, and the other (n=35) containing 57% solim?es and 37% putumayo. the first group confirmed the pará landrace. the second group suggested that the solim?es landrace does not exist, but that the putumayo landrace extends along the solim?es river to central amazonia.
Contribution of the institutions in the Northern region of Brazil to the development of plant cultivars and their impact on agriculture
Aparecida das Gra?as Claret de Souza,Nelcimar Reis Sousa,Ricardo Lopes,André Luiz Atroch
Crop Breeding and Applied Biotechnology , 2012,
Abstract: This paper describes the development of breeding programs in northern Brazil and their main impacts on agriculture. Their contribution to the breeding of the species palm oil, acai fruit, cacao, cupua u, guarana, tomato, camu-camu, cocona, peach palm, and rubber was laid out in detail. Advances in breeding programs of institutions such as Embrapa, Ceplac, Inpa, and Universities require investments in infrastructure and in human and financial resources to ensure continuity and efficiency in economic, social and environmental gains. The improvement of native species, the main focus of the breeding programs of the institutions in the Northern region of Brazil, is a form of exploiting the Amazonian biodiversity for the benefit of society. Therefore, policies to foster research institutions should be a subject of deliberation and action of the scientific and technological community in Brazil.
Divergência genética entre clones de guaranazeiro
Nascimento Filho Firmino José do,Atroch André Luiz,Sousa Nelcimar Reis de,Garcia Terezinha Batista
Pesquisa Agropecuária Brasileira , 2001,
Abstract: As técnicas multivariadas, para estimar a diversidade genética de um grupo de progenitores, têm sido utilizadas com freqüência pelos melhoristas de plantas. Os progenitores s o utilizados em cruzamentos biparentais ou múltiplos, para forma o de popula es segregantes que tenham maior probabilidade de recupera o de genótipos superiores. Este trabalho foi realizado com o objetivo de identificar clones de guaranazeiro produtivos e divergentes que possam ser utilizados em um programa de cruzamentos para obter híbridos com alto valor heterótico e materiais para propaga o vegetativa. Foram avaliados 148 clones de guaranazeiro atualmente em uso no programa de melhoramento genético da Embrapa-Centro de Pesquisa Agroflorestal da Amaz nia Ocidental. Utilizou-se, para estimativa da divergência genética, a análise de agrupamento, em que a medida de dissimilaridade utilizada foi a distancia euclidiana média padronizada e os métodos de agrupamento de otimiza o de Tocher e do vizinho mais próximo para constru o do dendrograma entre grupos de clones. Houve a forma o de sete grupos divergentes de clones. Concluiu-se que a divergência genética entre os clones n o é grande, pois dois grupos foram formados com dois clones e três grupos foram formados somente com um único clone. Os clones CMU384 e CMU801 foram os mais próximos geneticamente e podem ser utilizados na forma o de uma popula o com desenvolvimento vegetativo uniforme para uso em plantios comerciais.
Indu o de brota o apical em mudas provenientes de sementes e do enraizamento de estacas de mangost ozeiro = Induction of apical bud sprouting in seedlings and rooting of cuttings of mangosteen
Larissa Alexandra Cardoso Moraes,Terezinha Batista Garcia,Nelcimar Reis Sousa,Ad?nis Moreira
Acta Scientiarum : Agronomy , 2007,
Abstract: Com objetivo de induzir a brota o apical de mudas de mangost ozeiro, foi realizado um experimento que consistiu na aplica o de dois reguladores de crescimento: cinetina (0, 100 e 400 mg L-1) e giberelina (50 mg L-1), e outros dois experimentos para obten o de estacas enraizadas: a) aplica o de ácido-indol-3-butírico nas concentra es de 0, 100, 500 e 1000 mg L-1 e b) aplica o de ácido a naftaleno acético na concentra o de 6000 mg L-1. Nesses ensaios foram utilizadas estacas maduras provenientes de ramosortotrópicos. Os resultados indicaram a possibilidade do uso de reguladores para a obten o de porta-enxertos mais uniformes e com menor tempo de forma o, e apesar da baixa taxa de enraizamento, a obten o de mudas de estacas enraizadas de mangost ozeiro obtida comfitorm nios apresenta grande potencial, equivalendo em tamanho a uma muda de um ano proveniente de sementes apomíticas. With the objective to induce apical bud sprouting in youngmangosteen seedlings an experiment was carried out with the application of the plant growth regulators kinetin (0, 100 and 400 mg L-1) and gibberellin GA4+7 (50 mg L-1). To obtain rooted cuttings two other experiments were performed: a) application of indolbutyric acid at the concentrations of 0, 100, 500 and 1000 mg L-1 and b) application of a naphtaleneacetic acid, at 6000 mg L-1. In these trials cutting from orthotropic branches were utilized. The results indicated the possibility of using plant growth regulators to obtainmore uniform root stocks in a shorter nursery stage and, despite the low percentage of rooting the planting material obtained from cuttings has a great practical potential, since the size of the rooting cuttings is equivalent to that of one year old seedlings.
In vitro rescue of interspecific embryos from Elaeis guineensis x E. oleifera (Arecaceae)
Paula Cristina da Silva Angelo,LarissaAlexandra Cardoso Moraes,Ricardo Lopes,Nelcimar Reis Sousa
Revista de Biología Tropical , 2011,
Abstract: The African oil palm (Elaeis guineensis) is the most effective oil producer in tons per hectare. Nevertheless, its increasing cultivation in Latin America is harmed by the “lethal yellowing”. Genetic resistance to this anomaly can be found in the germplasm of American oil palm or caiaué (E. oleifera), a native species from the Amazon rainforest. However, the procedures adopted to induce seeds of E. guineensis to germination frequently result mild for interespecific hybrids. Embryo in vitro cultivation can be a viable option. This work was aimed initially to test liquid MS medium supplemented with different glucose or sucrose concentrations for the in vitro cultivation of zygotic embryos from E. guineensis x E. oleifera controlled pollinations. Additionally we investigated different compost mixtures to acclimatize the regenerated hybrid plantlets. Concentrations of 10, 20 and 30g/L of both sugars were tested on flasks containing five mature zygotic embryos, with 15 repetitions per treatment in a total of 450 explants. The number of embryos displaying shoots and radicles at least 2mm in length per experimental unit was evaluated during phase one of in vitro cultivation. Plantlets displaying shoots and radicles were transferred to phase two of in vitro cultivation and subsequently to acclimatization, under 70% shading with manual water supply. The experiments of acclimatization were conducted with 130 plantlets randomly distributed in pure horticultural compost, 3:1 or 1:1 compost:sand mixtures and each plantlet was defined as an experimental unit. Data were submitted to ANOVA, t test and analyzes of correlation (p≤0.05). Highest emergence rates were 97% for shoots and 73% for radicles, observed in MS medium supplemented with 20g/L (110mM) of glucose. This sugar in concentrations of 20 or 30g/L provided balanced shoot/root development, and this was considered one of the reasons for the higher frequency of plantlet establishment. The survival percentage was 55% after the first 43 days of acclimatization and by the fourth month, 66 plants developed simultaneously longer shoot and root systems in pure horticultural compost. in conclusion, radicle development was an impairment to plantlet establishment and was overcame under media with glucose above 110mM. Acclimatization could benefit from an extended period of in vitro development. Rev. Biol. Trop. 59 (3): 1081-1088. Epub 2011 September 01. Elaeis guineensis es el productor de aceite más eficaz en toneladas por hectárea, su cultivo, cada vez mayor en América Latina, se ha visto perjudicado por el “amarilleami
La percepción del riesgo en los turistas con discapacidad física: Una propuesta de abordaje específico
Rodrigues Reis,Jarlene;
Estudios y perspectivas en turismo , 2011,
Abstract: in scientific research in tourism, there are quirks to be investigated when it comes to the perceived risk by consuming a tourism product. as stated by reichel, uriely & fuchs (2007), these risks do not rely solely on information given about a tourist destination but also the individual characteristics of tourists. this article draws attention to the need for a specific approach when analyzing the perceived risks between disabled tourists. the aim was the identification of generating elements of perceived risk among these tourists, which can be summarized in the following categories: adaptation of services and tourist facilities, type of disability of the subject, structure of urban location, services offered to disabled people and use of benefits reserved for disabled people. the statements of the respondents demonstrated the great importance of these attributes as elements of differentiation in the risk perception of tourists disabled. it is believed therefore that this work can provide a significant contribution to the understanding and perceptions of the tourist experience of disabled people, and proposes an approach that links risk perceptions and attributes considered relevant to the disabled.
La percepción del riesgo en los turistas con discapacidad física: Una propuesta de abordaje específico Perceived Risk between Disabled Tourists: A Specific Approach Proposition
Jarlene Rodrigues Reis
Estudios y perspectivas en turismo , 2011,
Abstract: En el ámbito de la investigación científica del turismo, existen peculiaridades a ser investigadas en lo que respecta al riesgo percibido al consumir un producto turístico. Como afirman Reichel, Fuchs & Uriely (2007), esos riesgos no dependen sólo de la información difundida sobre un destino turístico sino también de las características individuales de los turistas. Este artículo destaca la necesidad de un abordaje específico para analizar los riesgos percibidos en los turistas con discapacidad física. El objetivo consistió en identificar los elementos generadores de riesgo percibido entre esos turistas los cuales pueden ser resumidos en las siguientes categorías: adaptación de servicios y equipamientos turísticos, tipo de discapacidad física del turista, estructura urbana de la localidad, servicios ofrecidos a las personas con discapacidad física y uso de beneficios reservados a los discapacitados. Lo dicho por los entrevistados demuestra la relevancia de esos atributos como elementos de diferenciación de la percepción de riesgo de los turistas con discapacidad física. Se afirma, por lo tanto, que este trabajo realiza una contribución significativa para comprender la percepción y la experiencia turística de las personas con discapacidad física, proponiendo un abordaje que asocia la percepción de riesgo con los atributos considerados relevantes por las personas con discapacidad. In scientific research in tourism, there are quirks to be investigated when it comes to the perceived risk by consuming a tourism product. As stated by Reichel, Uriely & Fuchs (2007), these risks do not rely solely on information given about a tourist destination but also the individual characteristics of tourists. This article draws attention to the need for a specific approach when analyzing the perceived risks between disabled tourists. The aim was the identification of generating elements of perceived risk among these tourists, which can be summarized in the following categories: adaptation of services and tourist facilities, type of disability of the subject, structure of urban location, services offered to disabled people and use of benefits reserved for disabled people. The statements of the respondents demonstrated the great importance of these attributes as elements of differentiation in the risk perception of tourists disabled. It is believed therefore that this work can provide a significant contribution to the understanding and perceptions of the tourist experience of disabled people, and proposes an approach that links risk perceptions and attributes considered rele
Equites: Hierarquiza o e Diferencia o na elite guerreira celta nos séculos II e I a.C.
Luis Gustavo Reis Rodrigues
Brathair , 2007,
Abstract: This article intends to analyze the levels of social hierarchy in Gaul during the last two centuries of the 1st millenium BC, specifically considering the warrior elite. Our main source is Caesar's The Gallic War (De Bello Gallico), which narrates the Gaul's conquest.
Divergência genética entre clones de guaranazeiro
Nascimento Filho, Firmino José do;Atroch, André Luiz;Sousa, Nelcimar Reis de;Garcia, Terezinha Batista;Cravo, Manoel da Silva;Coutinho, Enilton Fick;
Pesquisa Agropecuária Brasileira , 2001, DOI: 10.1590/S0100-204X2001000300014
Abstract: the multivariate techniques to estimate the genetic diversity of a group of progenitors has been used by plant breeders. the progenitors are still being used in parental or multiple crossings to form segregating populations that have larger probability of recovering superior genotypes. this work was carried out with the objective of identifying guarana clones with high production and divergent clones that can be used in a crossing program in order to obtain hybrids with heterosis, as well as materials for vegetative propagation. one hundred and forty-eight clones of guarana in use at this moment in the genetic breeding program of embrapa-centro de pesquisa agroflorestal da amaz?nia ocidental were studied. to estimate the genetic divergence, the cluster analysis was used in which the measure of dissimilarity used was the euclidian average standardized distance and the tocher's method of grouping and a single linkage method to make up a dendrogram between groups of clones. there was formation of seven divergent groups. it was concluded that the genetic divergence between the clones is not large because two groups with two clones and three groups with one clone have been formed. the cmu384 and cmu801 clones were the genetically closest and could be used to form a population with uniform vegetative development for use in commercial plantations.
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