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Brasília, Brazil

de Oliveira E.J.,Embrapa Mandioca e Fruticultura Tropical CNPMF | Amorim V.B.O.,Embrapa Mandioca e Fruticultura Tropical CNPMF | Matos E.L.S.,Federal University of Reconcavo da Bahia | Costa J.L.,Federal University of Reconcavo da Bahia | And 3 more authors.
Plant Molecular Biology Reporter | Year: 2010

A set of 81 new microsatellite markers for Carica papaya L. previously identified by data mining using freely available sequence information from Genbank were tested for polymorphism using 30 germplasm accessions from the Papaya Germplasm Bank (PGM) at Embrapa Mandioca e Fruticultura Tropical (CNPMF) and 18 landraces. The data were used to estimate pairwise genetic distances between the genotypes. A neighbor-joining based dendrogram was used to define clusters and infer possible genetic structuring of the collection. Most microsatellites were polymorphic (73%), with an observed number of alleles per locus ranging from one to eleven. The levels of observed and expected heterozygosity for 51 polymorphic loci varied from 0.00 to 0.85 and from 0.08 to 0.82, averaging 0.19 and 0.59, respectively. Forty-four percent of microsatellites showed polymorphism information content (PIC) higher than 0.50. The compound microsatellites seem to be more informative than dinucleotide and trinucleotide repeats in average alleles per locus and PIC. Among dinucleotides, AG/TC or GA/CT repeat motifs exhibited more informativeness than TA/AT, GT/CA and TG/AC repeat motifs. The neighbor-joining analysis based on shared allele distance could differentiate all the papaya accessions and landraces as well as differences in their genetic structure. This set of markers will be useful for examining parentage, inbreeding and population structure in papaya. © Springer-Verlag 2010. Source


Branco M.C.,Embrapa Sede | de Alcantara F.A.,Embrapa Arroz e Feijao
Horticultura Brasileira | Year: 2011

Growing vegetables in backyards and in community gardens gained importance as an alternative policy for the reduction of poverty and the increasing of household food intake since the final years of the late century in Brazil. The Brazilian experiences have been reported in different scientific publications but until now, there has not been an attempt to evaluate those results. For that purpose, Brazilian scientific publications were sought in the sites www.google.com.br, www.scielo.com.br, www.periodicos.capes.gov.br and in the Lattes platform from CNPq. The results showed that the majority of publications were available to download free. The number of publications increased between 1996 and 2009 and most of them were published in Congresses and Meetings. Vegetable cultivation contributed to increase of the welfare of population. Nonetheless, several difficulties were reported: chiefly among these, the lack of social organization, lack of access to technical assistance, capital, land and water. Until now, the majority of these projects have been of short duration (less than three years); therefore it is necessary to carry out long term researches in order to evaluate strategies for overcoming these difficulties. Source


Onoyama S.S.,Embrapa Hortalicas | Reifschneider F.J.B.,Embrapa Hortalicas | Moita A.W.,Embrapa Hortalicas | da S e Souza G.,Embrapa Sede
Horticultura Brasileira | Year: 2010

Capsicum (chili and bell peppers) breeders at Embrapa Vegetables are focusing project activities to satisfy the demands of both growers and final consumers in order to increase the chances of success in, long-term development of new cultivars. So, a prospection study on consumer demands and perception on bell peppers was started in 2007 in order to identify the main attributes taken in consideration during the act of purchase. This work was divided in two parts: a pilot study with 444 consumers at one supermarket and a survey with 500 consumers of fresh bell pepper, carried out by interviews at five supermarkets in Brasilia, Brazil, which represent distinct income segments. Data were analyzed by categorical data analysis using SAS (Procedure CATMOD) to rank the attributes in order of importance; to contrast the attribute means; and to verify the psychosocial influence on ranking the attributes during the purchase act. In addition, correspondence analysis was used for graphical representation of the attributes separated by the level of importance. During purchase, consumers prioritize the attributes related to the visual aspect (appearance) and firmness of the fruits. Also, differences of perception by gender, age, educational level, marital status and supermarket location were detected. Based on the collected evidence, elderly people are more concerned about nutritional value. Plant breeding programs can be better focused utilizing inputs from similar studies. Source


De Lima J.S.S.,Rural University | Bezerra Neto F.,Rural University | Gomes E.G.,Embrapa Sede | De Negreiros M.Z.,Rural University | And 3 more authors.
Ecological Indicators | Year: 2014

The emergence of new vegetable cultivars enables the development of novel combinations of intercrops. Producers require information and comparative data on the behavior of these cultivars in intercropping agroecosystems to learn which crops can combine well and can consequently provide higher productivity and agroeconomic efficiency. This study evaluated the agroeconomic performance of two carrot and two rocket cultivars in a strip-intercropping system, with two harvests of rocket, under the hot and sunny conditions of the municipality of Mossoró, Rio Grande do Norte, in northeastern Brazil. The experiments used a randomized complete block design with five replicates and treatments arranged in a 2 × 2 factorial scheme. The treatments were the four possible combinations of two carrot cultivars (Brasília and Esplanada) and two rocket cultivars (Cultivada and Folha Larga). Each block contained plots of these four treatments and four monocultured plots, one for each carrot and rocket cultivar, for evaluating the efficiencies of the intercropping indices. Each treatment was evaluated for commercial productivity of carrots, green mass yield of rocket, land equivalent ratio, productive efficiency index, gross income, net income, rate of return and profit margin. Intercropping of the rocket cultivar Folha Larga and the carrot cultivar Brasilia is recommended. The multivariate analysis of the vegetable crop yields as compared to the univariate analysis of land equivalent ratio and productive efficiency index was quite effective in the discrimination of the carrot cultivars in the intercropping systems. However, this same method of multivariate analysis applied to the yields of the same vegetable crops when compared to the univariate analysis of the same indices was not effective in the discrimination of the rocket cultivars in the intercropping systems. © 2014 Elsevier Ltd. Source


Gomes E.G.,Embrapa Sede | De Abreu U.G.P.,Embrapa Pantanal | De Mello J.C.C.B.S.,Federal University of Fluminense
Revista Brasileira de Zootecnia | Year: 2015

This study evaluated the performance of 21 beef cattle modal production systems that conduct only the raising phase. These production systems were developed in 21 municipalities in seven Brazilian states. We used two different DEA BCC models, corresponding to different points of view. Firstly we used an economic model that measured the ability of a production system to generate revenue with the preservation of native forest, using labor, capital, and current spending as inputs. The socio-environmental approach, corresponding to the second BCC model, uses the production factor labor as an output. In that model our interest was to assess whether the capital costs generate economic, environmental, and social benefits. Weight restrictions were imposed on the output variables of each model to explain the proposed viewpoints and to avoid inconsistent results. The results pointed out sources of inefficiency in terms of labor with low qualification, and use of bulls of questionable quality, factors that are common in extensive systems. These are some of the major bottlenecks in animal production systems as a whole. © 2015 Sociedade Brasileira de Zootecnia. Source

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