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Search Results: 1 - 10 of 245108 matches for " Lígia Regina Lima;Costa "
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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 variability and selection for laticiferous system characters in Hevea brasiliensis
Gon?alves, Paulo de Souza;Cardinal, átila Bento Beleti;Costa, Reginaldo Brito da;Bortoletto, Nelson;Gouvêa, Lígia Regina Lima;
Genetics and Molecular Biology , 2005, DOI: 10.1590/S1415-47572005000300014
Abstract: six laticiferous system characters were investigated in 22 three-year-old, half-sib rubber tree [hevea brasiliensis (willd. ex adr. de juss.) muell.-arg.] progenies, evaluated at three sites (votuporanga, pindorama and jaú, all in the s?o paulo state, brazil). the traits examined were: average rubber yield (pp), average bark thickness (bt), number of latex vessel rings (lv), average distance between consecutive latex vessel rings (dc), density of latex vessels per 5 mm per ring averaged over all rings (dd) and the diameter of the latex vessels (di). the joint analysis showed that site effect and progeny x sites interaction were significant for all traits, except lv. estimates of individual heritabilities across the three sites were high for bt; moderate for lv, pp and dc; low for dd and very low for di. genetic correlations in the joint analysis showed high positive correlations between pp and the other traits. selecting the best five progenies would result in genetic gains of 24.91% for pp while selecting best two plants within a progeny would result in a pp genetic gain of 30.98%.
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.
Express?o fenotípica de clones de seringueira na regi?o noroeste do estado de S?o Paulo
Gon?alves, Paulo de Souza;Aguiar, Adriano Tosoni da Eira;Gouvêa, Lígia Regina Lima;
Bragantia , 2006, DOI: 10.1590/S0006-87052006000300004
Abstract: the development of new clones with high production combined to other desirable secondary characters is fundamental for a sustainable and competitive rubber tree cultivation. the objective of this study was to evaluate, during a period of 13 years, the phenotypic expression of superior characters of 17 clones of rubber tree grown in the plateau region of s?o paulo state, brazil. the treatments were arranged in a randomized block design with three replicates and six plants per linear plot. the clone iac 40 exhibed the highest yield (2.316 kg ha-1 year-1) followed by iac 300 (1.921 kg), whereas the control clone rrim 600 had 1.493 kg ha-1 year-1 over six years of tapping. the percentage of plants able for opening ranged from 40% for iac 329 to 100% for iac 327. except for iac 56, iac 331 and ian 3156, with 7.21 mm, 7.18 mm and 6.40 mm respectively, all other clones had lower thick virgin bark at opening compared to the control clone rrim 600, which recorded 6.38 mm. except ian 3.156 all clones showed low incidence of panel dryness. the good performance of all clones, both from iac and amazone (ian, fx and ro) allow their recommendation for small scale cultivation, when they would be further tested in different environments of the s?o paulo state, aiming recommendations in large scale.
Divergence and genetic variability among superior rubber tree genotypes
Gouvêa, Lígia Regina Lima;Chiorato, Alisson Fernando;Gon?alves, Paulo de Souza;
Pesquisa Agropecuária Brasileira , 2010, DOI: 10.1590/S0100-204X2010000200007
Abstract: the objective of this work was to estimate the genetic variability and divergence among 22 superior rubber tree (hevea sp.) genotypes of the iac 400 series. univariate and multivariate analyses were performed using eight quantitative traits (descriptors), including yield. in the univariate analyses, the estimated parameters were: genetic and environmental variances; genetic and environmental coefficients of variation; and the variation index. the mahalanobis generalized distance, the tocher agglomerative method and canonical variables were used for the multivariate analyses. in the univariate analyses, variability was verified among the genotypes for all the variables evaluated. the tocher method grouped the genotypes into 11 clusters of dissimilarity. the first four canonical variables explained 87.93% of the cumulative variation. the highest genetic variability was found in rubber yield-related traits, which contributed the most to the genetic divergence. the most divergent pairs of genotypes are suggested for crossbreeding. the genotypes evaluated are suitable for breeding and may be used to continue the iac rubber tree breeding program.
Representa??es sociais da depress?o em jovens universitários com e sem sintomas para desenvolver a depress?o
Fonseca, Aline Arruda da;Coutinho, Maria da Penha de Lima;Azevedo, Regina Lígia Wanderlei de;
Psicologia: Reflex?o e Crítica , 2008, DOI: 10.1590/S0102-79722008000300018
Abstract: the objective of this research was to understand the social representations of depression in the students of the psychology course from a university in the city of jo?o pessoa, pb. a number of 56 university students participated of the research, from both genders, aged between 18 and 26 years old. as instruments, the beck depression inventory for the screening of the sample and the test of free association of words were used. data were processed by tri-deux-mots software (version 2.2) and were analyzed through the factorial analysis of correspondence. the results obtained showed that the students objectified their representations of depression in the melancholy and disillusion, in a bond of support and necessity of care. lack of affection was also pointed as a depressive fact, and the factors associated to the perception of themselves are elaborated with the social reality of the context in which they live, showing that the semantic associations brought by the university students are a result of the problems that surround their position in the society, as well as the information they gave about the illness.
Mortalidade infantil e contexto socioecon?mico no Ceará, Brasil, no período de 1991 a 2001
Bezerra-Filho, José Gomes;Kerr-Pontes, Lígia Regina Sansigolo;Barreto, Maurício Lima;
Revista Brasileira de Saúde Materno Infantil , 2007, DOI: 10.1590/S1519-38292007000200003
Abstract: the infant mortality rate (imr) has been determined as one of the most important health indicators by the alma-ata conference of the world health organization that also recognized primary health care as the key for health promotion. the united nations international childhood fund and the pan-american health organization devised low cost strategies for poor countries to reduce infant mortality rates such as growth monitoring, oral rehydration, breastfeeding, and vaccination. the assumption that substantial imr reduction is related to quality of life improvement has been questioned due to specific interventions of the health sector. in this scenario ceará and a large part of the northeast has historically coped with adversities in the social, economic and demographic areas including health care, thus establishing a causal relation among these sectors especially concerning infant mortality. macroepidemiological determinants for infant survival would be out of the health sector capacity of intervening therefore, only significant change of economic standards or social policies intensification, assuring continuity of education issues, of sanitation and generation of employment and income could have an impact on the population health and consequently on infant mortality. such hypothesis justifies a more in-depth investigation under a methodological viewpoint.
Social representations of the depression in young university students with and without symptoms to develop the depression / Representa es sociais da depress o em jovens universitários com e sem sintomas para desenvolver a depress o
Aline Arruda da Fonseca,Maria da Penha de Lima Coutinho,Regina Lígia Wanderlei de Azevedo
Psicologia: Reflex?o e Crítica , 2008,
Abstract: The objective of this research was to understand the social representations of depression in the students of the Psychology Course from a university in the city of Jo o Pessoa, PB. A number of 56 university students participated of the research, from both genders, aged between 18 and 26 years old. As instruments, the Beck Depression Inventory for the screening of the sample and the Test of Free Association of Words were used. Data were processed by Tri-Deux-Mots software (version 2.2) and were analyzed through the Factorial Analysis of Correspondence. The results obtained showed that the students objectified their representations of depression in the melancholy and disillusion, in a bond of support and necessity of care. Lack of affection was also pointed as a depressive fact, and the factors associated to the perception of themselves are elaborated with the social reality of the context in which they live, showing that the semantic associations brought by the university students are a result of the problems that surround their position in the society, as well as the information they gave about the illness.
Distribui??o espacial da taxa de mortalidade infantil e principais determinantes no Ceará, Brasil, no período 2000-2002
Bezerra Filho, José Gomes;Kerr, Lígia Regina Franco Sansigolo;Miná, Daniel de Lima;Barreto, Maurício Lima;
Cadernos de Saúde Pública , 2007, DOI: 10.1590/S0102-311X2007000500019
Abstract: the geographic distribution of health problems and its relationship to potential risk factors has opened a vast field for epidemiological research. the present study aims to identify spatial distribution patterns for the neonatal and post-neonatal components of the infant mortality rate (imr) in ceará state, brazil, and discuss the main socioeconomic, demographic, and healthcare factors contributing to the spatial dependence of these components. this cross-sectional ecological study uses multiple linear regression, in which spatial analysis of the components was obtained through the moran index. prenatal, childbirth, and neonatal care as well as improved income distribution are decisive for survival in the first month of life, while other factors related to nutrition, immunization, sanitation, education, and economic status are possible determinants of post-neonatal mortality. selective healthcare measures are known to play a decisive role in decreasing the imr. however, structural and inter-sector changes generate the sustainability needed to maintain this indicator on the same level as in developed countries.
Mortalidade infantil e condi??es sociodemográficas no Ceará, em 1991 e 2000
Bezerra Filho,José Gomes; Pontes,Lígia Regina Franco Sansigolo Kerr; Miná,Daniel de Lima; Barreto,Maurício Lima;
Revista de Saúde Pública , 2007, DOI: 10.1590/S0034-89102007000600018
Abstract: objective: to assess ecological models to describe infant mortality rate in ceara (northeastern brazil) in two different periods of time. methods: this was a cross-sectional ecologic study of two years, 1991 and 2000, using non-matching information per municipalities. estimates on the infant mortality rate of the instituto de pesquisas econ?micas aplicadas (institute of applied economic research) have been used. for the remaining indicators different sources of the system of health information were used. the main risk factors were assessed using multiple linear regression. results: in 1991, the variables that predicted infant mortality rate (r2=0.3575) were: small houses (b=0.0043; r=0.010), proportion of inhabitants with tap water in the household (b=-0.0029; r=0.024), urbanization rate (b=0.0032; r=0.004), fecundity rate (b=0.0351; r=0.024), the proportion of children working at 10-14 years (b=0.0049; r=0.017), proportion of families with income < ? minimum wage (b=0.0056; r=0.000), that can read and write (b=-0.0062; r=0.031). in the year 2000, the following possible determinants were identified (r2=0.3236): the proportion of children <2 years of age with malnutrition (b=0.0064; r=0.024), proportion of households with adequate sanitation (b=-0.0024; r=0.010), proportion of women who could read and write (b=-0.0068; r=0.044), expenses on health human resources regarding total health expenses (b=-0.0024; r=0.027), proportion of the value of the vegetal production in relation to the total of the state (b=-0.1090; r=0.001), intensity of poverty (b=0.0065; r=0.002), and ageing index (b=-0.0100; r=0.006). conclusions: although the variables have not been exactly the same for the evaluated period, determiners of infant mortality have been changing, except for indicators of education, income and sanitation. the overall decrease in fecundity led to a reduction in its discriminating power, and it was replaced by the ageing index. another tendency observed was the replace o
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