Data/hora: 06/06/2024 14:31:46

Provedor de dados: | 65
País: | Brazil
Título: | Nonlinear quantile regression to describe the dry matter accumulation of garlic plants
Autores: | Puiatti,Guilherme Alves; Cecon,Paulo Roberto; Nascimento,Moysés; Nascimento,Ana Carolina Campana; Carneiro,Antônio Policarpo Souza; Silva,Fabyano Fonseca e; Puiatti,Mário; Cruz,Cosme Damião.
Data: | 2020-01-01
Ano: | 2020
Palavras-chave: | Quantile regression; Nonlinear regression; Allium sativum L.; Growth rate; Cluster analysis.
Resumo: | ABSTRACT:  The objective of this study was to adjust nonlinear quantile regression models for the study of dry matter accumulation in garlic plants over time, and to compare them to models fitted by the ordinary least squares method. The total dry matter of nine garlic accessions belonging to the Vegetable Germplasm Bank of Universidade Federal de Viçosa (BGH/UFV) was measured in four stages (60, 90, 120 and 150 days after planting), and those values were used for the nonlinear regression models fitting. For each accession, there was an adjustment of one model of quantile regression (τ=0.5) and one based on the least squares method. The nonlinear regression model fitted was the Logistic. The Akaike Information Criterion was used to evaluate the goodness of fit of the models. Accessions were grouped using the UPGMA algorithm, with the estimates of the parameters with biological interpretation as variables. The nonlinear quantile regression is efficient for the adjustment of models for dry matter accumulation in garlic plants over time. The estimated parameters are more uniform and robust in the presence of asymmetry in the distribution of the data, heterogeneous variances, and outliers.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000100203
Editor: | Universidade Federal de Santa Maria
Relação: | 10.1590/0103-8478cr20180385
Formato: | text/html
Fonte: | Ciência Rural  v.50 n.1 2020
Fonte: | info:eu-repo/semantics/openAccess