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A sunflower testing network that included 25 commercial hybrids and 26 sites in Serbia was analyzed by the sites regression Blogspot based on grain yield data in 2006 and 2007. | G. R. BRANKOVIĆ, I. M. BALALIĆ, M. Z. ZORIĆ, V. J. MIKLIČ, S. B. JOCIĆ, G. G. ŠURLAN MOMIROVIĆ Research Article Turk J Agric For 36 (2012): 275-283 © TÜBİTAK doi:10.3906/tar-1106-45 Characterization of sunflower testing environments in Serbia Gordana R. BRANKOVIĆ1,*, Igor M. BALALIĆ2, Miroslav Z. ZORIĆ3, Vladimir J. MIKLIČ2, Siniša B. JOCIĆ2, Gordana G. ŠURLAN MOMIROVIĆ1 1 2 University of Belgrade, Faculty of Agriculture, 11000 Belgrade - SERBIA Oil Crops Department, Institute of Field and Vegetable Crops, 21000 Novi Sad - SERBIA 3 University of Novi Sad, Faculty of Technology, 21000 Novi Sad - SERBIA Received: 24.06.2011 Abstract: A sunflower testing network that included 25 commercial hybrids and 26 sites in Serbia was analyzed by the sites regression biplot based on grain yield data in 2006 and 2007. The scientific aims of our study were to determine the representativeness and discriminating ability of the test sites and to identify good test sites for selecting generally and specifically adapted sunflower hybrids. Correlations among test sites, revealed by biplot and with Spearman’s nonparametric rank correlation coefficients for each pair of test sites, were compared. Discriminating but nonrepresentative test sites in our study were represented by Aleksa Šantić (18.8 °C average temperature, 72.0 mm precipitation, and 269.2 h of sunshine) and Rimski Šančevi (18.4 °C average temperature, 79.2 mm precipitation, and 252.1 h of sunshine), based on a biplot analysis of the 2006 testing network. Sombor (20.1 °C average temperature, 52.5 mm precipitation, and 304.7 h of sunshine) was also a discriminating but nonrepresentative test site, based on a biplot analysis of the 2007 testing network. A test site that was both discriminating and representative was Kikinda (20.2 °C average temperature, 63.3 mm precipitation, and 313.7 h of sunshine), based on a 2007 biplot analysis. Sombor and Kikinda could be suitable test sites for selecting specifically and .
