Data/hora: 10/06/2024 10:26:55

Provedor de dados: | 94
País: | Brazil
Título: | Canopy replacement used in the evaluation of cupuassu tree genotypes in the state of Pará
Autores: | Alves,Rafael Moysés; Chaves,Saulo Fabrício da Silva; Oliveira,Raimundo Parente de; Pedroza Neto,Jack Loureiro; Sebbenn,Alexandre.
Data: | 2020-01-01
Ano: | 2020
Palavras-chave: | Theobroma grandiflorum; Genetic breeding; Clone selection; Over grafting; Witch broom.
Resumo: | Abstract  This study aimed to use the canopy replacement technique to reduce the field evaluation time and to select promising cupuassu tree clones. The study was carried out under field conditions using fifteen-year-old trees. The crowns were replaced using 16 treatments (clones). The experiment was conducted using randomized blocks design with 18 replicates and one plant per plot, during a period of ten years. The following variables were evaluated: average number of fruits, fruit, seed and pulp production (kg/plant) and symptoms of “witches broom” disease. The data were checked for normality followed by analysis of variance. The results highlighted clones 32, 42, 44, 46, 47, 61, 62, 63 and 64, presenting characteristics such as productivity, tolerance to witches’ broom disease and interesting fruit characteristics. The results demonstrate that the technique was effective in the evaluation of cupuassu tree genotypes, since the clones revealed their potential at early stages after establishment in the field. There was a reduction by at least 30% regarding the time needed to evaluate cupuassu tree genotypes. Five clones (32, 42, 46, 61 and 64) already present the potential to be made available to producers, aimed at replacing the canopy of unproductive trees.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452020000401003
Editor: | Sociedade Brasileira de Fruticultura
Relação: | 10.1590/0100-29452020597
Formato: | text/html
Fonte: | Revista Brasileira de Fruticultura  v.42 n.4 2020
Fonte: | info:eu-repo/semantics/openAccess