Data/hora: 03/06/2024 06:20:39

Provedor de dados: | 65
País: | Brazil
Título: | Estimates of genetic parameters for physic nut traits based in the germplasm two years evaluation
Autores: | Laviola,Bruno Galvêas; Alves,Alexandre Alonso; Gurgel,Fábio de Lima; Rosado,Tatiana Barbosa; Rocha,Rodrigo Barros; Albrecht,Julio Cesar.
Data: | 2012-03-01
Ano: | 2012
Palavras-chave: | Jatropha curcas; Plant breeding; Quantitative genetic.
Resumo: | In spite of increasingly widespread interest in planting physic nut, breeding efforts are still in its infancy. In that context, an important resource recently established aiming future breeding efforts was the assembly of a germplasm bank with near 200 accessions. The objective of this study was to estimate genetic parameters, repeatibility coefficients and genetic correlation between seven traits, measured in 110 accessions (half sib families) of this germplasm bank in different stages of development. The results show that higher relative values of additive variance were only found for yield and height, and the existence of low environmental variation (either of temporary or permanent nature) among plots within blocks. Given the high repeatibility values found for all traits, on average three measurements are necessary to predict, accurately and efficiently, the true breeding value of an individual. Based on the results of genetic correlations, breeding effort should initially be use track trees with increased stem diameter, elevated number of branches and canopy volume so as to increase the chances of finding an exceptionally highly productive tree.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012000300008
Editor: | Universidade Federal de Santa Maria
Relação: | 10.1590/S0103-84782012000300008
Formato: | text/html
Fonte: | Ciência Rural  v.42 n.3 2012
Fonte: | info:eu-repo/semantics/openAccess