2009
DOI: 10.1590/s0100-204x2009000600009
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Repetibilidade da produção de sementes em clones de guaraná

Abstract: Resumo -O objetivo deste trabalho foi avaliar a repetibilidade da produção de sementes de 27 clones de guaraná (Paullinia cupana). Os clones foram avaliados em dez ensaios instalados em blocos ao acaso com duas repetições e três plantas por parcela, com espaçamento de 5x5 m. A produção de sementes foi avaliada por quatro anos (1998, 1999, 2000 e 2001) a partir do início da fase produtiva, após dois anos do plantio. O coefi ciente de repetibilidade foi estimado pelos métodos: análise de variância (ANOVA), comp… Show more

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Cited by 14 publications
(12 citation statements)
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“…Low repeatability coefficients were observed for the production traits in several other perennial species, such as the peach-palm (Bactris gasipaes Kunth), the Brazilian shrub (Paullinia cupana) and the açaí palm (Euterpe oleracea Mart.) FERNANDES, 2001;PADILHA et al, 2003;NASCIMENTO FILHO et al, 2009 Table 2 -Determination coefficient (C 2 ), accuracy of the permanent phenotypic values based on m years of evaluation (A cm ) and efficiency of m measurements compared to when only one evaluation is performed (Ef), for the number of fruits per plant (NFP) and fresh seed weight per plant (SWP) evaluated in two Brazil nut native populations (ITA and CUJ) in Roraima. Caracaraí -RR, 2013.…”
Section: Discussionmentioning
confidence: 99%
“…Low repeatability coefficients were observed for the production traits in several other perennial species, such as the peach-palm (Bactris gasipaes Kunth), the Brazilian shrub (Paullinia cupana) and the açaí palm (Euterpe oleracea Mart.) FERNANDES, 2001;PADILHA et al, 2003;NASCIMENTO FILHO et al, 2009 Table 2 -Determination coefficient (C 2 ), accuracy of the permanent phenotypic values based on m years of evaluation (A cm ) and efficiency of m measurements compared to when only one evaluation is performed (Ef), for the number of fruits per plant (NFP) and fresh seed weight per plant (SWP) evaluated in two Brazil nut native populations (ITA and CUJ) in Roraima. Caracaraí -RR, 2013.…”
Section: Discussionmentioning
confidence: 99%
“…In repeatability studies performed with other perennials, such as guarana (NASCIMENTO FILHO et al 2009), plum tree/peach trees (DANNER et al 2010), and peach palm (Bergo et al 2013), the authors considered coefficients of determination of 90% when calculating the necessary numbers of measurements (ƞ 0 ). In this study, the use of a coefficient of determination of 90% results in a value of two for the necessary numbers of measurements for the FLD, SLD, FW, and SW variables, for all of the methods.…”
Section: Resultsmentioning
confidence: 99%
“…The coefficient of repeatability is of great importance for breeding studies and several authors have used this concept for studies of traits conducted for numerous perennial species, such as guarana (NASCIMENTO FILHO et al, 2009), bacuri (SILVA et al 2009), plum tree and peach tree (DANNER et al, 2010), açaí palm (FARIAS NETO et al, 2011), jatropha (ROCHA et al, 2012, and peach palm (BERGO et al, 2013).…”
Section: Introductionmentioning
confidence: 99%
“…A repetibilidade (r) para o caráter produtividade foi de baixa magnitude, concordando com as estimativas obtidas por Nascimento Filho et al (2009). O coeficiente de repetibilidade representa o valor máximo que a herdabilidade no sentido amplo pode atingir.…”
Section: Methodsunclassified