PHENOTYPIC, GENOTYPIC AND ENVIRONMENTAL CORRELATIONS IN SOYBEAN CULTIVATED UNDER AN IRRIGATED MEADOW IN SOUTH OF TOCANTINS STATE

A trial was carried out to estimate the phenotypic, genotypic and environmental correlations between eight agronomic traits, in twelve cultivars of soybean. The essays were carried out at Formoso do Araguaia, TO, in the inter-cropping of 2007. The soybean cultivars studied were DM Vitoria, MG/BR 46 (Conquista), Suprema, BRS Pintado, DM 247, BRS MG 68, BRS MG Lideran a, BRS MG Seguranca, DM 339, BRS MG Garantia, A 7002 e DM 309. The genotypic correlations presented equal signs and, in most cases were higher than their correspondent phenotypic correlations, indicating that the phenotypic values were reduced by the environment. The correlations genotypic presented equal sign and, in most of the cases, superior values to their correspondents correlations phenotypic, indicating that the expression phenotypic is reduced before the influences of the atmosphere. Selection of late flowering plants and with height insertion of the first bean would make it possible to indirectly improve grains yield due to the positive and significant correlation between these traits.