Consulta: creatorFacets:"Sturion,José Alfredo"
Registros recuperados: 5
Data/hora: 09/06/2024 02:51:01

Quantitative genetic analysis of methylxanthines and phenolic compounds in mate progenies
Provedor de dados: 86
Autores: Cardozo Junior,Euclides Lara; Donaduzzi,Carmen Maria; Ferrarese-Filho,Osvaldo; Friedrich,Juliana Cristhina; Gonela,Adriana; Sturion,José Alfredo.
The objective of this work was to determine the contents of methylxanthines, caffeine and theobromine, and phenolic compounds, chlorogenic and caffeic acids, in 51 mate progenies (half-sib families) and estimate the heritability of genetic parameters. Mate progenies were from five Brazilian municipalities: Pinhão, Ivaí, Barão de Cotegipe, Quedas do Iguaçu, and Cascavel. The progenies were grown in the Ivaí locality. The contents of the compounds were obtained by high performance liquid chromatography (HPLC). The estimation of genetic parameters by the restricted maximum likelihood (REML) and the prediction of genotypic values via best linear unbiased prediction (BLUP) were obtained by the Selegen - REML/BLUP software. Caffeine (0.248-1.663%) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ilex paraguariensis; Caffeine; Caffeic acid; Chlorogenic acid; Genetic parameters; Theobromine.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010000200008

Avaliação genética em erva-mate pelo procedimento BLUP individual multivariado sob interação genótipo x ambiente
Provedor de dados: 86
Autores: Simeão,Rosangela Maria; Sturion,José Alfredo; Resende,Marcos Deon Vilela de; Fernandes,José Sebastião Cunha; Neiverth,Dalnei Dalzoto; Ulbrich,Angelo Luiz.
Os objetivos deste trabalho foram estimar parâmetros genéticos e fenotípicos e realizar a predição de valores genéticos de matrizes e procedências de erva-mate (Ilex paraguariensis). Foram avaliadas 164 progênies de oito procedências, em três locais (Ivaí, PR, Guarapuava, PR e Rio Azul, PR), em relação ao caráter produção de massa foliar (PMF). Os componentes de variância, parâmetros genéticos e valores genéticos foram estimados pelo procedimento REML/BLUP individual (máxima verossimilhança restrita/melhor predição linear não viciada), realizando a análise multivariada para os três locais. Os coeficientes de herdabilidade individual, no sentido restrito, para o caráter PMF foram 0,15 em Ivaí, 0,62 em Guarapuava e 0,23 em Rio Azul. A baixa magnitude desses...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ilex paraguariensis; Variação genética; Valor genético; Herdabilidade; Melhoramento de plantas.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2002001100010

Early selection and classification of yerba mate progênies
Provedor de dados: 86
Autores: Wendling,Ivar; Sturion,José Alfredo; Stuepp,Carlos André; Reis,Cristiane Aparecida Fioravante; Ramalho,Magno Antonio Patto; Resende,Marcos Deon Vilela de.
Abstract: The objective of this work was to evaluate the feasibility of early selection of open-pollinated yerba mate (Ilex paraguariensis) progenies, and to classify the best parents and candidates for clones. The germplasm is composed of 140 progenies collected from areas within the natural distribution of the species in Southern Brazil and a commercial genotype (control). The experiment was established in Ivaí, in the state of Paraná, Brazil, in March 1997, in randomized complete blocks, with ten replicates, and linear plots of six plants. The commercial mass (kg per plant) of leaves and branches smaller than 7 mm was harvested at 2.5, 4.5, 6.5, and 18.7 years of age. The statistical evaluation was performed using the mixed model procedure with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ilex paraguariensis; Cloning; Genetic correlation; Progeny x harvesting-age interaction.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000300279

Genetic parameters estimates and visual selection for leaves production in Ilex paraguariensis
Provedor de dados: 53
Autores: Sturion,José Alfredo; Stuepp,Carlos André; Wendling,Ivar.
ABSTRACT The selection of yerba mate superior genotypes, based on each plant leaf weight, is based on genetic parameters obtained from experimental plantations and it is practically impossible from the fourth year of age. Therefore, we estimate genetic parameters and check the feasibility of selection through notes and weight estimates of each tree at 18.5 years of age. The genetic material consists of a combined trial of provenances and progenies of half-sibs with 140 progenies from 7 provenances, installed in Ivaí, Paraná, Brazil, in a randomized block design with 10 repetitions. The genetic control of leaf production is of low magnitude (ĥ2a= 0.175042 ± 0.0393) revealing high influence of the environment. The additive genetic correlations between the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic correlations; Yerba mate; Silviculture; Progeny trial.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000400492

Inheritance and linkage relationships of allozyme variants of ilex paraguariensis St. Hil
Provedor de dados: 52
Autores: Wendt,Simone Neumann; Sousa,Valderês Aparecida de; Sebbenn,Alexandre Magno; Sturion,José Alfredo; Luíz,Felipe; Santos,Elisa Caroline da Silva; Quoirin,Marguerite.
Eighteen enzyme systems were examined in Ilex paraguariensis St. Hil. using starch gel electrophoresis. Seven out of 12 active isozyme systems revealed one or more polymorphic loci (PGI, GOT, MR, G-6PDH, MDH, NDH, and 6-PGDH). However, the segregation and linkage analyses were performed only for PGI, GOT, G-6PDH and 6-PGDH systems. Gene segregation at these loci was regular, except for a few trees that showed segregation distortion. Weak linkage disequilibrium between loci was detected, but it was not enough to influence the multilocus estimate.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Erva-mate (matê); Electrophoresis; Loci; Allele; Segregation.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000600016