Data/hora: 10/06/2024 16:17:52

Provedor de dados: | Revista Ciência Agronômica (RCA)
País: | Brazil
Título: | Genetic control of traits associated with phosphorus use efficiency in maize by REML/BLUP
Autores: | DoVale,Júlio César; Fritsche-Neto,Roberto.
Data: | 2013-09-01
Ano: | 2013
Palavras-chave: | Zea mays; Genic effect; Abiotic stress; Mixed Models.
Resumo: | The improvement phosphorus use efficiency (PUE) allows to reach satisfactory yields with lower costs. A breeding strategy for PUE is to increase its components, the phosphorus acquisiton efficiency (PAE) and phosphorus utilization efficiency (PUtE). Thus, this study aimed to identify: i) the relative importance of the components of PUE, in high and low phosphorus; ii) the relationship of root system length and shoot dry mass (SDM) with PUE and its components and; iii) the genetic control of traits associated with the PUE. Forty-one hybrid combinations were evaluated in two experimental environments representing contrasting conditions of availability of phosphorus: low (LP) and high (HP). A randomized block design with two replications were used in simple factorial (hybrid combination x availability of phosphorus) arrangement. Independently of phosphorus availability, PAE was the most important component of the PUE and non-additive genetic effects were more important to the traits associated with the PUE. It was observed that the estimates of specific combining ability for SDM and PUE, in LP and HP, showed similar behavior and magnitude, indicating that the selection based on performance of hybrid combinations for SDM, allows to obtain genotypes with high PUE.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000300018
Editor: | Universidade Federal do Ceará
Relação: | 10.1590/S1806-66902013000300018
Formato: | text/html
Fonte: | Revista Ciência Agronômica  v.44 n.3 2013
Fonte: | info:eu-repo/semantics/openAccess