Selection of grain sorghum lines efficient and responsive to phosphorus application
36 sorghum inbred lines were evaluated in a randomized complete block design, with 2 replicates
Abstract
皇冠体育app objective of this work was to select sorghum lines simultaneously responsive to phosphorus fertilization and with high productive efficiency regarding this nutrient. Thirty six sorghum inbred lines were evaluated in a randomized complete block design, with two replicates. 皇冠体育app traits used to evaluate the productive efficiency were average yield and efficiencies of absorption, utilization, and use of phosphorus, with and without phosphorus fertilization. For the analysis of the responsivity to the nutrient, the evaluated traits were relative yield and apparent recovery, physiological, and agronomic efficiencies. 皇冠体育app lines were genetically divergent as to the efficiencies of absorption, utilization, and use of phosphorus, and to the responsivity to the nutrient, suggesting the possibility of producing hybrids destined to different market niches. 皇冠体育app most responsive lines were P9401, BR007B, BR008B, SC414-12E, and SC566, and the most efficient ones under low phosphorus availability were ATF40B, SC566, BR005R, CMSXS225, and BR012 (R6). 皇冠体育app ATF40B, ATF54 (f61), ATF54 (f596), QL3, and SC566 lines showed better simultaneous performance for the different evaluated efficiencies and for the responsivity to phosphorus. 皇冠体育app evaluation of productivity alone, under different phosphorus availabilities, already makes it possible to identify efficient and responsive lines to phosphorus.
Citation
Rodrigues, F.; Vieira de Magalhaes, J.; Teixeira Guimaraes, C.; Tardin, F.D.; Schaffert, R.E. Sele莽茫o de linhagens de sorgo gran铆fero eficientes e responsivas 脿 aplica莽茫o de f贸sforo.[Selection of grain sorghum lines efficient and responsive to phosphorus application] Pesquisa Agropecu谩ria Brasileira (2014) 49 (8) 613-621. [DOI: 10.1590/S0100-204X2014000800005] [In Portuguese with English abstract]