Cooperativa Central de Pesquisa Agricola da Nossa Terra

Brazil

Cooperativa Central de Pesquisa Agricola da Nossa Terra

Brazil

Time filter

Source Type

Silva R.R.,State University Londrina | Benin G.,Federal Technological University of Paraná | da Silva G.O.,Embrapa Transferencia de Tecnologia | Marchioro V.S.,Cooperativa Central de Pesquisa Agricola da Nossa Terra | And 2 more authors.
Pesquisa Agropecuaria Brasileira | Year: 2011

The objective of this work was to identify the best sowing dates and to evaluate the adaptability and stability of wheat cultivars in two wheat growing regions of the state of Paraná, Brazil. Seven cultivars were evaluated at Guarapuava and nine at Palotina as to grain yield, at four sowing seasons, in 2006, 2007 and 2008. The experimental design was a randomized complete block design, with four and three replicates, for Guarapuava and Palotina, respectively. The methodologies REML/BLUP and genotype main effect and genotype x environment interaction (GGE biplot) were used for adaptability and stability analysis, and the AMMI model was used to identify the best sowing dates. Sowing in July, at Guarapuava, and in April, at Palotina, maximized grain yield. The cultivars Safira, at Guarapuava, and CD 113, at Palotina, are stable, highly adapted and show high grain yield.


Benin G.,Federal Technological University of Paraná | Storck L.,Federal Technological University of Paraná | Marchioro V.S.,Cooperativa Central de Pesquisa Agricola da Nossa Terra | de Assis Franco F.,Cooperativa Central de Pesquisa Agricola da Nossa Terra | And 2 more authors.
Crop Breeding and Applied Biotechnology | Year: 2013

The aim of this study was to verify whether using the Papadakis method improves model assumptions and experimental accuracy in field trials used to determine grain yield for wheat lineages indifferent Value for Cultivation and Use (VCU) regions. Grain yield data from 572 field trials at 31 locations in the VCU Regions 1, 2, 3 and 4 in 2007-2011 were used. Each trial was run with and without the use of the Papadakis method. The Papadakis method improved the indices of experimental precision measures and reduced the number of experimental repetitions required to predict grain yield performance among the wheat genotypes. There were differences among the wheat adaptation regions in terms of the efficiency of the Papadakis method, the adjustment coefficient of the genotype averages and the increases in the selective accuracy of grain yield.

Loading Cooperativa Central de Pesquisa Agricola da Nossa Terra collaborators
Loading Cooperativa Central de Pesquisa Agricola da Nossa Terra collaborators