oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 2 )

2019 ( 186 )

2018 ( 342 )

2017 ( 364 )

Custom range...

Search Results: 1 - 10 of 202976 matches for " Fernando Queiroz de;Pereira "
All listed articles are free for downloading (OA Articles)
Page 1 /202976
Display every page Item
Correlations between insect resistance and horticultural traits in potatoes
Velci Queiroz de Souza,Arione da Silva Pereira,Giovani Olegário da Silva,Fernando Irajá Félix de Carvalho
Crop Breeding and Applied Biotechnology , 2006,
Abstract: The objective of this study was to determine relationships between insect resistance and some horticulturaltraits and the implications on selection. A potato population of 11 clonal families derived from crosses between insect resistantand genotypes adapted to the southern region of Brazil was used. The following traits were evaluated: plant size and vigor,incidence of insect attacks on leaves and tubers, tuber yield and appearance components. Phenotypic and genotypic correlationsbetween leaf and tuber resistance were not significant for the population, while phenotypic correlations between the tworesistance types were significant for individual families, with exception of the family originated from the cross involving ND263-32 . The incidence of insect attacks on tubers was significantly correlated with tuber yield and appearance in familiesderived from crosses of NYL235-4 . The manifold correlations of leaf resistance with horticultural traits for all families weresignificant and unfavorable.
Síndrome cólica em equinos de uso militar: análise multivariável de fatores de risco
Laranjeira, Paula Vieira Evans Hossell;Almeida, Fernando Queiroz de;Lopes, Marco Aurélio Ferreira;Pereira, Maria Júlia Salim;
Ciência Rural , 2009, DOI: 10.1590/S0103-84782009000600024
Abstract: this research aimed to identify colic associated factors in horses of military units in rio de janeiro state: regimento escola de cavalaria, academia militar das agulhas negras and esquadr?o escola de cavalaria. a case control study nestled in one coorte was conducted. a total of 770 horses had been studied, with 362 (47.0%) horses classified as cases and 408 (53.0%) as control. multivariable analysis of logistic regression was used to identify colic predictive factors, showing that horses confined system creation (or= 3.62; 95% ci 2.57-5.10), concentrate intake above 6kg day-1 (or= 2.64; 95% ci 1.54-4.50) and equine age, with higher possibility of colic in horses above 16 years (or= 2.08; 95% ci 1.18-3.67), had been risk factors significantly associated with colic, after adjustment for other variables.
Comportamento ingestivo em bezerros holandeses alimentados com dietas contendo diferentes níveis de concentrado
Bürger Peter Johann,Pereira José Carlos,Queiroz Augusto César de,Coelho da Silva José Fernando
Revista Brasileira de Zootecnia , 2000,
Abstract: RESUMO - Os efeitos de diferentes níveis de concentrado sobre o comportamento ingestivo foram estudados com cinco bezerros holandeses, inteiros, com idade e peso corporal médios iniciais de 10,8±0,8 meses e 233,4±26,1 kg PV. Os animais foram alojados em baias individuais e alimentados à vontade com dietas contendo 30, 45, 60, 75 e 90% de concentrado, com base na MS. As ra es contendo, aproximadamente, 16% PB foram formuladas para taxa de ganho de peso de 1,0 kg/dia e compostas por farelo de soja, fubá de milho e feno de capim coast-cross. O delineamento experimental em blocos casualizados com cinco tratamentos, com dura o de 20 dias, 12 dias de adapta o e quatro períodos de dois dias, relativos à coleta de dados foi usado. O tempo despendido em alimenta o e rumina o diminuiu, e o tempo de ócio aumentou linearmente, em fun o do aumento dos níveis de concentrado. A eficiência de alimenta o em g MS/h registrou comportamento quadrático, estimando-se o valor máximo em 826,81 g FDN/h, para o nível de 60,77% de concentrado. A eleva o no nível de concentrado nas dietas aumentou linearmente a eficiência de rumina o em g MS/h, mas em g FDN/h decresceu linearmente. O número de bolos ruminais e de mastiga es merícicas por dia decresceu linearmente. O número e o tempo de mastiga o merícica por bolo registraram comportamento quadrático, estimando-se valores máximos de 73,79 mastiga es e 66,61 segundos, por bolo ruminal, para os níveis de 48,51 e 54,44% de concentrado, respectivamente.
Carcinoma espinocelular da mama: relato de um caso
Pereira, Rubens José;Pereira, Wilson Garcia;Ribeiro, Luiz Fernando Jubé;Alencar, Rita de Cássia;Saddi, Vera;Queiroz, Geraldo Silva;Freitas Júnior, Ruffo de;
Revista Brasileira de Ginecologia e Obstetrícia , 1999, DOI: 10.1590/S0100-72031999000700009
Abstract: squamous cell carcinoma of the mammary tissue is a very rare neoplasm, representing less than 1% of all breast carcinomas. the present study reports a case of squamous cell carcinoma of the breast, treated at the hospital araújo jorge/accg. the tumor diagnosis, treatment and prognosis are also discussed.
Níveis de concentrado na dieta de bezerros
Ribeiro, Marinaldo Divino;Pereira, José Carlos;Bettero, Vitor Pereira;Queiroz, Augusto César de;Costa, Marcone Geraldo;Leonel, Fernando de Paula;
Revista Brasileira de Zootecnia , 2009, DOI: 10.1590/S1516-35982009000600022
Abstract: the objective of this study was to evaluate the levels of concentrate for growing calves. four holstein × brahman crossbred calves with average age of 7 months and 155 kg of body weight were used, distributed into one latin square design (4 × 4). the animals were fed ad libtum in the form of complete diet containing levels of 20, 40, 60 and 80% of concentrate on the dry matter basis (dm). the diets were composed of cynodon dactylon hay, corn, soybean meal and mineral mixture, and were isoprotein (15.4%). the dm, organic matter (om), neutral detergent fiber (ndf) and total carbohydrate (tc) consumption showed linear response; and crude protein (cp) and total digestible nutrients (tdn), quadratic response; expressed in kg/day. when expressed in %bw, the om, cp, ee and tdn consumption presented quadratic behavior; as dm, ndf and tc showed linear behavior. the apparent total digestibility dm and cp coefficients were quadratic influenced by the levels of concentrate, while om, ee, ndf and tc showed linear behavior. no effect was observed for the average concentration of ammoniac nitrogen, depending on the levels of concentrate, for each time of analysis. however, for ph, there was influence of the levels for the times analyzed. likewise, no effect was observed for the average concentration of serum glucose, however, for urea nitrogen serum (uns), a linear negative effect was observed, depending on the levels for each post-feeding time. therefore, up to 60% of concentrate could be included in the diet of calves; however higher levels can affect the use of bulky.
Comportamento produtivo e características nutricionais do capim-braquiária cultivado em consórcio com milho
Leonel, Fernando de Paula;Pereira, José Carlos;Costa, Marcone Geraldo;De Marco Júnior, Paulo;Lara, Luciano Aurélio;Queiroz, Augusto César de;
Revista Brasileira de Zootecnia , 2009, DOI: 10.1590/S1516-35982009000100022
Abstract: the objective of this work was to evaluate the chemical characteristics of the whole plant and the leaf and stem fractions of signal grass in different sowing arrangements to determine the productive performance of the corn/signal grass intercrop. the production of dry matter (dm), crude protein (cp) and total digestible nutrients (tdn) per area was evaluated, as well as the concentration of cp, digestible crude protein (cpd), neutral detergent insoluble crude protein (ndicp), neutral detergent fiber (ndf), lignin (lig) non-fiber carbohydrate (nfc) and tdn in dm and the leaf:stem ratio (l:s) at different sowing arrangements and culture age. the sowing arrangements tested were: two lines of signal grass in the corn inter-lines, hand-sowed signal grass in the corn inter-lines, one line of signal grass in the same line of corn, one line of signal grass in the corn inter-lines, exclusive signal grass and exclusive corn culture. the culture age effect was evaluated by sampling plants at 128, 141, 174 and 199 days after sowing. the largest production of dm, cpd and tdn was obtained for signal grass in exclusive culture. during the period when the corn culture shadowed the signal grass, the leaf:stem ratio of intercropped signal grass was lower than the signal grass in exclusive culture. forages from arrangements with higher shadowing (hand-sowed signal grass and one line of signal grass at the same line of corn) were less productive and presented higher cp concentration in the dm. in general, higher concentrations of cp and lower of ndf and lig were found in the leaf fraction in relation to the stem fraction, regardless the sowing arrangements. the intercrop did not affect the lig, nfc and tdn concentration in the dm of the signal grass, but the age had an effect on these variables. the corn production was not affected by the intercrop or by the different arrangements.
Qualidade de película de famílias clonais de batata
Silva, Giovani Olegario da;Pereira, Arione da Silva;Souza, Velci Queiroz de;Carvalho, Fernando Irajá Félix de;Vieira, Eduardo Alano;
Bragantia , 2008, DOI: 10.1590/S0006-87052008000300011
Abstract: tuber general appearance is a very important trait for potato breeding, once it affects consumer acceptance of in natura products. among appearance components the tuber coloration and smooth are very important. the objective of this work was to investigate the expected selection response for traits related to skin quality (smooth and coloration) and tuber appearance in three potato families. the experiments were performed in the experimental field of embrapa clima temperado during the spring of 2004 and 2005, using three families at second and third clonal generations, respectively. the traits smooth, skin coloration and tuber general appearance in the tubers were evaluated. data was analyzed statistically according to the model reml/blup, in way to distinguish fixed and aleatory effects and comparing values among the families, correlation between traits, heritability index and gain of selection. it can be verified that, for the development of superior potato populations regarding skin quality, the inclusion of parents bearing flat and clear skin is necessary. the traits smoothness and tuber coloration are correlated with the tuber general appearance, but this trait has lower heritability than its components.
Correla??es entre caracteres de aparência e rendimento e análise de trilha para aparência de batata
Silva, Giovani Oleário Da;Pereira, Arione da Silva;Souza, Velcio Queiroz de;Carvalho, Fernando Irajá Félix de;Fritsche Neto, Roberto;
Bragantia , 2007, DOI: 10.1590/S0006-87052007000300003
Abstract: the objective of this work was to verify correlations between characters of tuber appearance and yield; as well as the influence of tuber appearance components characters on their expression and selection implications. a potato hybrid population of 15 families each one with 60 genotypes. the experiments were conducted in the experimental field of embrapa clima temperado, pelotas, rio grande do sul state, brazil, in fall of 2004 and 2005. tuber appearance was closer correlated with tuber shape, tuber curvature, tuber pointing and tuber eyebrow, in the seedling generation, and with tuber shape and tuber size uniformity, in the first clonal generation. yield was strongly associated with tuber size, tuber number and average tuber weight, in the seedling stage, and with tuber size, tuber number, average tuber weight, tuber flatness and plant vigor, in the first clonal generation. tuber curvature showed to be the most effective trait for indirect selection to improve tuber appearance in both generations. the results suggest that in the seedling stage, tuber pointing should also be considered along with tuber curvature the selection of tuber appearance.
Development of a transformation system for Penicillium brevicompactum based on the Fusarium oxysporum nitrate reductase gene
Varavallo, Maurílio Ant?nio;Queiroz, Marisa Vieira de;Pereira, Jorge Fernando;Ribeiro, Ronney Adriano;Soares, Marcos Ant?nio;Ribeiro, Jo?o Batista;Araújo, Elza Fernandes de;
Brazilian Journal of Microbiology , 2005, DOI: 10.1590/S1517-83822005000200015
Abstract: penicillium brevicompactum is a filamentous fungus that presents a potential for industrial use due its efficient pectinase production. a heterologous transformation system was developed for p. brevicompactum based on the complementation of a nitrate reductase mutant. nitrate reductase mutants were obtained by resistance to chlorate in a rate of 23.24% when compared to other mutations that lead to the chlorate resistance. one mutant named 4457-18x was chosen for the transformation experiments with the pnh24 vector containing de fusarium oxysporum nitrate reductase gene. a frequency of approximately 3 transformants/μg dna was obtained using the circular vector pnh24. this frequency was multiplied about 10 fold using the linearized vector with the xba i restriction enzyme. southern analysis of the transformants showed a tendency of the linearized vector to diminish the number of integrations compared to the use of the circular vector. the integration was random and stable in the analyzed transformants. the establishment of a transformation system for p. brevicompactum is fundamental for genetic manipulation of this microorganism.
Capacidade de combina??o multivariada para caracteres de tubérculo em gera??es iniciais de sele??o em batata
Silva, Giovani Olegario da;Pereira, Arione da Silva;Souza, Velci Queiroz de;Carvalho, Fernando Irajá Félix de;Vieira, Eduardo Alano;
Ciência Rural , 2008, DOI: 10.1590/S0103-84782008000200004
Abstract: the diallel analysis provides estimates of useful parameters to parent selection and to the understanding of the genetic effects involved in a trait control. this research was aimed at estimating multivariate combining ability of potato parents in the initial generations of selection. twenty potato clonal families (5*4) of nine genotypes in a partial diallel design were evaluated for two successive generations. the experiments were conducted at the embrapa clima temperado, in pelotas, rs (31° s, 52° w), in the spring of 2005 and autumn of 2006. fourteen morphological tuber traits were evaluated and the six more stable, or those that were best repeated in the generations were selected for further analysis. the analysis of variance revealed significant differences for all traits. the diallel multivariate analysis, using principal components, showed "2cri-1149-1-78", "eliza", "c-1786-6-96" and "white lady" genotypes with higher general combining ability for tuber appearance, smoothness, eye brown, pointing, curving and flatness, contributing with additive effects for crossings. the "c-1750-15-95"/"agria", "c-1786-6-96"/"asterix" and "eliza"/"asterix" cross combinations were outstanding for specific combing ability for tuber eye brown, pointing, curving and flatness, and "2cri-1149-1-78"/"vivaldi", "eliza"/"bp1" and "eliza"/"agria" for tuber appearance, smoothness and eye brown.
Page 1 /202976
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.