Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Any time

4 ( 1 )

2019 ( 68 )

2018 ( 171 )

2017 ( 135 )

Custom range...

Search Results: 1 - 10 of 58969 matches for " Reginaldo Brito da;Moraes "
All listed articles are free for downloading (OA Articles)
Page 1 /58969
Display every page Item
Age-age correlation for early selection of rubber tree genotypes in S?o Paulo State, Brazil
Gon?alves, Paulo de Souza;Bortoletto, Nelson;Cardinal, átila Bento Beleti;Gouvêa, Lígia Regina Lima;Costa, Reginaldo Brito da;Moraes, Mário Luiz Teixeira de;
Genetics and Molecular Biology , 2005, DOI: 10.1590/S1415-47572005000500018
Abstract: in a field trial involving 68 rubber tree (hevea spp.) clones calculation of genotypic correlation coefficients revealed significant age-age correlation from age 1 to 6 (immature period) for girth a and for age 7 to 12 (mature period) for girth b and for age 7 to 12 (production of latex) for yield. rank correlation coefficients between all immature ages of girth (girth a), all ages of mature girth (girth b) and all annual rubber production (yield) were significant for the three traits, with the coefficients decreasing with increasing age. selection of the sets of best 30, 15, 10 and 5 clones from the available 68 clones at a given age was generally accompanied by a descending order of percentage success. it was suggested: (a) to have the best 30 clones of age 6, select the set of best 36 clones at age 2, (b) to have the best 15 clones of age 6, select the set of best 20 clones at age 3, (c) to have the best 5 clones of age 6, select the set of best 8 clones at age 4, and (d) to have the best 3 clones of age 6, select the set of best 3 clones at age 5. more than 80% of the targeted clones on girth a or girth b basis and more than 76.7% clones on yield basis were found to get selected at steps (a) through (d). for achieving early multiplication of the most productive clone for deployment, multiplication should be started with the best 36 (i.e. 60%) clones selected at age 2.
Genetic variation in growth traits and yield of rubber trees (Hevea brasiliensis) growing in the Brazilian state of S?o Paulo
Gon?alves, Paulo de Souza;Moraes, Mário Luiz Teixeira de;Bortoletto, Nelson;Costa, Reginaldo Brito da;Gon?alves, Elaine Cristine Pifer;
Genetics and Molecular Biology , 2005, DOI: 10.1590/S1415-47572005000500019
Abstract: analysis of variance and covariance was preformed on growth traits (stem girth, bark thickness, total height gain and rubber yield) of 22 open-pollinated progenies of the rubber tree hevea brasiliensis from an asian hevea collection introduced to agronomic institute (instituto agron?mico, campinas, s?o paulo, brazil; iac) in 1952. this progeny trial was replicated at three sites in s?o paulo state and it was found that at three years from sowing there was statistically significant variation for girth, bark thickness, height and rubber yield. an individual test sites, values of individual plant heritability for girth ranged from h= 0.36 to h= 0.89 whereas values for heritability for progeny means ranged from h= 0.77 to h= 0.87. these moderate and high heritabilities suggest that a combination of progeny and within-progeny selection would be effective at increasing girth in this population at individual sites. across sites, values of individual-plant heritability for girth ranged from h= 0.36 to h= 0.47, whereas values for heritability of progeny means girth ranged from h= 0.77 to h= 0.87. there were high positive genetic correlations between increased girth and bark thickness suggesting that breeding aimed at increasing girth would also increase bark thickness and possibly height.
Prediction of Hevea progeny performance in the presence of genotype-environment interaction
Gon?alves, Paulo de Souza;Moraes, Mário Luiz Teixeira de;Silva, Marcelo de Almeida;Gouvêa, Lígia Regina Lima;Aguiar, Adriano Tosoni da Eira;Costa, Reginaldo Brito da;
Brazilian Archives of Biology and Technology , 2009, DOI: 10.1590/S1516-89132009000100004
Abstract: twenty two open-pollinated hevea progenies from different parental clones of the asian origin were tested at five sites in the northwestern s?o paulo state brazil to investigate the progeny girth growth, rubber yield, bark thickness and plant height. except for the rubber yield, the analysis of variance indicated highly significant (p<0.01) genotype x environment interaction and heterogeneity of regressions among the progenies. however, the regression stability analysis identified only a few interacting progenies which had regression coefficients significantly different from the expected value of one. the linear regressions of the progeny mean performance at each test on an environmental index (mean of all the progenies in each test) showed the general stability and adaptability of most selected hevea progenies over the test environments. the few progenies which were responsive and high yielding on different test sites could be used to maximize the rubber cultivars productivity and to obtain the best use of the genetically improved stock under different environmental conditions.
Natural Regeneration in Tropical Secondary Forest in Southern Amazonia, Brazil  [PDF]
Alexandre Ebert, Leandro Ribeiro Teixeira, Adriana Zanirato Contini da Silva, Reginaldo Brito da Costa
Open Journal of Forestry (OJF) , 2014, DOI: 10.4236/ojf.2014.42021

The study aimed to establish floral composition, diversity levels, category size, phytosociological structure, commercial use and ecological group of species present in the regeneration of open ombrophile forest in southern Amazon, Brazil. Data were collected at S?o Nicolau farm, in the municipality of Cotrigua?u, northwest of Mato Grosso state, coordinates 51°9'19.5\"S and 58°14'53\"W. One hundred plots of 10 × 10 m were allocated. All individuals between 29.9 and 59.9 cm had circumference at breast height (CAP) measure, with sub-plots of 5 × 5 m which were measured in all subjects between 1:50 m in height 29.9 cm CAP and sub-plots of 2 × 2 m for individuals between 0.30 to 1.5 m tall. The information obtained in the field were processed in excel spreadsheet. The results showed the occurrence of 610 individuals belonging to 82 species, 34 plant families, with a diversity index of Shannon & Weavers 2.77. The index of value of importance showed species Protium robustum,

Chá: aspectos relacionados à qualidade e perspectivas
Lima, Juliana Domingues;Mazzafera, Paulo;Moraes, Wilson da Silva;Silva, Reginaldo Barboza da;
Ciência Rural , 2009, DOI: 10.1590/S0103-84782009005000026
Abstract: black tea is one of the most widely consumed beverages in the world and it is prepared by the infusion of water with processed leaves of camellia sinensis, which is cultivated in more than 30 countries, assuming a great socioeconomic importance. several studies suggest that tea has protective effects against cancer and cardiovascular disease, due to the presence of polyphenols called catechins, which are oxidized enzymatically during the processing of the black tea, generating a mixture consisting mainly of theaflavins, theasinensins and thearubigins. the world production of tea has increased more than the demand, causing a drop of the price which, together with the increase in cultivation costs has shown a need for high productivity and quality. nevertheless, there is not yet an efficient and accurate criteria to predict the quality of tea and agronomic practices which contribute to the increase in quality. in brazil, the culture of tea is concentrated in the ribeira valley - sp, and almost all the production is exported. despite the brazilian product is not of high quality, it has achieved good prices in the international market. the brazilian production, the production area and the number of tea industries are decreasing in recent years, clearly indicating the need for investments.
Estado, mercado e outras institui??es reguladoras
Moraes, Reginaldo;
Lua Nova: Revista de Cultura e Política , 2003, DOI: 10.1590/S0102-64452003000100007
Abstract: recent transformations of the role, dimensions, forms and relevance of the national state in the framework of the so-called globalization are examined. this is done through the building of three analytical axis. the first one regards the redefinition of the "state form". the second one points toward the links between social institutions and political organs of representation and decision. the third one focuses on the necessarily international dimension of the political forms of organization which may or ought to be conceived in order to face the complexity of the relationships between political institutions and economic innovations.
Estado, mercado e outras institui es reguladoras
Moraes Reginaldo
Lua Nova: Revista de Cultura e Política , 2003,
Abstract: Examinam-se transforma es recentes no papel, dimens es, forma e relevancia do Estado nacional, no quadro da chamada globaliza o. Isso é feito mediante a constru o de três eixos analíticos. O primeiro deles contempla a redefini o da "forma-Estado". O segundo aponta para os vínculos entre institui es sociais e instancias políticas de representa o e decis o. O terceiro enfatiza a dimens o necessariamente internacional das formas políticas de organiza o que podem ou devem ser pensadas para enfrentar a complexidade das rela es entre institui es políticas e inova es econ micas.
Recursos genéticos, biodiversidade, conhecimento tradicional Kaiowá e Guarani e o desenvolvimento local
Rego, Flávio Luís Hilário;Brand, Antonio Jacó;Costa, Reginaldo Brito da;
Intera??es (Campo Grande) , 2010, DOI: 10.1590/S1518-70122010000100006
Abstract: this paper approaches the slow but consistent remaining vegetation recovery, as a result of the integration of local habitants and partner organs efforts, in the kaiowá and guarani area. it's confirmed by the rich reports that there's an immense acquis of traditional knowledge, containing forms of utilization and environmental management models, which point out a more adequate and likely sustainability situation.
A erva-mate e os Kaiowá e Guarani: da abordagem etnobotanica à promo??o do desenvolvimento local
Contini, Adriana Zanirato;Castilho, Maria Augusta de;Costa, Reginaldo Brito da;
Intera??es (Campo Grande) , 2012, DOI: 10.1590/S1518-70122012000200003
Abstract: the present study aims at establishing a historical-cultural relationship between the kaiowá and the guarani and the native tea plant (paraguayan tea), with alternatives for the promotion of local development. the text seeks to understand the repercussions in the use of the plant ilex by the indigenous communities and the colonizers, with the economic exploitation of the plant and the strengthening of traditional knowledge. throughout the study, effort has been made to bring together information which clarifies the role of the native tea plant in regional history, emphasizing and adequating the roles of the agents responsible for the development of what today is the state of mato grosso do sul, with special emphasis on the participation of the jesuits, the kaiowá and guarani and the social-environmental repercussions as a result of colonization, as well as the importance of policies that strengthen the cultivation of the plant in areas where it grows wild.
Sistema reprodutivo de Anadenanthera peregrina (L.) Speg e Vochysia haenkiana (Spreng.) Mart. em fragmento de cerrado na Chapada dos Guimar?es - MT
Costa, Reginaldo Brito da;Contini, Adriana Zanirato;Melo, Elaine Silva de Pádua;
Ciência Rural , 2003, DOI: 10.1590/S0103-84782003000200019
Abstract: the study of the breeding system of anadenanthera peregrina (l.) speg. and vochysia haenkiana (spreng.) mart. was the main purpose of this work. it was also studied fruit maturation, seed dispersal and seed germination to characterize the reproductive system of these two species. field work was carried out in a fragment of cerrado forest from chapada dos guimar?es-mt (15010's, 55035' w), with an altitude of 450m. date analyses followed the randomized block design, with. six treatments for vochysia haenkiana and five treatments for anadenanthera peregrina, each treatment replicated three individuals. both species showed a breeding system preferably xenogamic (cross-pollination), but fruit production by autogamy suggests a gradual increase of genetic self-compatibility as a strategy for maintenance of progeny presence in fragmented forest environment. the degree of genetic self-incompatibility demonstrated by anadenanthera peregrina is favoured by its dicogamy patterns that promotes cross-pollination. fruit maturation and seed dispersal pattern, were different for each species, and were observed during or at the end of the dry season, making seed dispersal of anemocoric propagules more effective. germination was fast and observed in a high percentage of seeds from both species.
Page 1 /58969
Display every page Item

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