Number of replicates, of plants per plot and of evaluations for eucalyptus clonal tests
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Data
2015-10-01
Autores
Araujo, Marcio Jose de [UNESP]
Dias, Donizete da Costa
Scarpinati, Edimar Aparecido
Paula, Rinaldo Cesar de [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Empresa Brasil Pesq Agropec
Resumo
The objective of this work was to determine the necessary number of replicates, of plants per plot, and of measurements for evaluating growth traits in eucalyptus (Eucalyptus spp.) clonal tests. Data on height, diameter at breast height, and wood volume were evaluated in three clonal tests, performed in a randomized complete block design with 30 (tests 1 and 2) and 10 clones (test 3), with six replicates of six (test 1) and 10 (tests 2 and 3) plants. The evaluations were performed from 14 to 74 months of age. The coefficients of repeatability and determination were estimated, as well as the effects of increasing measurement frequency on selective efficiency. Wood volume is the trait with the greatest variability in the plot and the lowest repeatability; therefore, it requires more plants to obtain high accuracy in the estimate of the individual's true value. In Eucalyptus grandis x E. urophylla hybrid clonal tests, the use of three replicates of six plants per plot and of three evaluations, at ages above 2 years, is recommended in order to achieve a selective accuracy around 90%.
Descrição
Palavras-chave
Eucalyptus, intraclass correlation, selection efficiency, Urograndis hybrid, mixed models, repeatability
Como citar
Pesquisa Agropecuaria Brasileira. Brasilia Df: Empresa Brasil Pesq Agropec, v. 50, n. 10, p. 923-931, 2015.