Data/hora: 01/06/2024 02:10:43

Provedor de dados: | 53
País: | Brazil
Título: | Genetic divergence among cupuaçu accessions by multiscale bootstrap resampling
Autores: | Santos,Vinicius Silva dos; Martins Filho,Sebastião; Alves,Rafael Moysés; Resende,Marcos Deon Vilela de; Silva,Fabyano Fonseca e.
Data: | 2015-06-01
Ano: | 2015
Palavras-chave: | Clustering; UPGMA; Tocher; Theobroma grandiflorum.
Resumo: | This study aimed at investigating the genetic divergence of eighteen accessions of cupuaçu trees based on fruit morphometric traits and comparing usual methods of cluster analysis with the proposed multiscale bootstrap resampling methodology. The data were obtained from an experiment conducted in Tomé-Açu city (PA, Brazil), arranged in a completely randomized design with eighteen cupuaçu accessions and 10 repetitions, from 2004 to 2011. Genetic parameters were estimated by restricted maximum likelihood/best linear unbiased prediction (REML/BLUP) methodology. The predicted breeding values were used in the study on genetic divergence through Unweighted Pair Cluster Method with Arithmetic Mean (UPGMA) hierarchical clustering and Tocher’s optimization method based on standardized Euclidean distance. Clustering consistency and optimal number of clusters in the UPGMA method were verified by the cophenetic correlation coefficient (CCC) and Mojena’s criterion, respectively, besides the multiscale bootstrap resampling technique. The use of the clustering UPGMA method in situations with and without multiscale bootstrap resulted in four and five clusters, respectively, while the Tocher’s method resulted in seven clusters. The multiscale bootstrap resampling technique proves to be efficient to assess the consistency of clustering in hierarchical methods and, consequently, the optimal number of clusters.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052015000200169
Editor: | Instituto Agronômico de Campinas
Relação: | 10.1590/1678-4499.0431
Formato: | text/html
Fonte: | Bragantia  v.74 n.2 2015
Fonte: | info:eu-repo/semantics/openAccess