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Rodrigues F.,UEG | De Magalhaes J.V.,Nucleo de Recursos Geneticos e Desenvolvimento de Cultivares NRGC | Pinto C.A.B.P.,Federal University of Lavras | Tardin F.D.,Nucleo de Recursos Geneticos e Desenvolvimento de Cultivares NRGC | Schaffert R.E.,Nucleo de Recursos Geneticos e Desenvolvimento de Cultivares NRGC
Revista Caatinga | Year: 2014

The optimization of nutritional efficiency is critical to increase productivity and reduce production costs. However, the identification of lines with greater efficiency and responsiveness to phosphorus is of great importance, with the in intention to join the hybrid, these traits at once and, moreover, the best way to select them. Thus, the objective of this study was to evaluate which characters should be considered in the selection of genotypes efficient and responsive to phosphorus in sorghum. The correlations were split into direct and indirect basic variables of efficiency and responsiveness to phosphorus through path analysis. The character that most influenced the efficiency of sorghum lines to phosphorus was harvest index to utilization efficiency and dry matter to absorption efficiency and use, under conditions of stress. Under conditions of adequate phosphorus fertilization, the trait with the greatest influence for evaluation of responsiveness was dry grain mass to the apparent recovery efficiency, physiological and agronomic. © 2014, Universidade Federal Rural do Semi-Arid. All rights reserved. Source

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