Data/hora: 16/06/2024 03:59:19

Provedor de dados: | 65
País: | Brazil
Título: | Selection among and within and combined selection in oil palm families derived from Dura x Dura
Autores: | Cedillo,Digner Santiago Ortega; Ferreira,Fábio Medeiros; Barros,Willian Silva; Cruz,Cosme Damião; Dias,Luiz Antônio dos Santos; Rocha,Rodrigo Barros.
Data: | 2008-02-01
Ano: | 2008
Palavras-chave: | Elaeis guineensis Jacq.; Family test; Selection strategies; Pi statistic.
Resumo: | Oil palm, in view of the worldwide consumed oil, is a perennial crop of great importance. Nevertheless, the genetic improvement is still incipient. In this study we applied the selection among and within families and the combined selection, based on the phenotypic values and phenotypic performance (Pi statistic), to verify which strategy obtained the highest genetic gains. Five full-sib families were evaluated in randomized blocks, with five replicates and 12 plants per plot, over five years of successive harvests. The total number of bunches and the total fruit yield per year plant-1 were evaluated. Values of 1.00 and 0.25 for the ratio between the environmental variance among plots and the environmental variance among plants within the plot for both traits, respectively, were adequate for the estimation of the genetic parameters. The existence of genetic variability in the population Dura was verified for both evaluated traits. The combined selection, based either on the phenotypic values or on the underlying Pi statistic, resulted in the highest genetic gains. Despite the satisfactory gains since it translates the true yield potential of the evaluated genotypes and their performance stability.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782008000100011
Editor: | Universidade Federal de Santa Maria
Relação: | 10.1590/S0103-84782008000100011
Formato: | text/html
Fonte: | Ciência Rural  v.38 n.1 2008
Fonte: | info:eu-repo/semantics/openAccess