YIELD STABILITY OF MAIZE HYBRIDS AND VARIETIES IN THE MIDDLE-NORTH REGION OF BRAZIL

Twenty-four maize cultivars (21 varieties and three hybrids) were evaluated in twelve environments of the Middle-North Region of Brazil (six in Piauí and six in Maranhão), in the 2000/2001 and 2001/2002 growing seasons, aiming to obtain regionally adapted materials. The experiments were carried out...

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Bibliographic Details
Published in:Pesquisa agropecuária tropical 2004-09, Vol.34 (3), p.167
Main Authors: Cardoso, Milton José, Lemos de Carvalho, Hélio Wilson, de Oliveira, Antônio Carlos, de Souza, Evanildes Menezes
Format: Article
Language:eng ; por
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Summary:Twenty-four maize cultivars (21 varieties and three hybrids) were evaluated in twelve environments of the Middle-North Region of Brazil (six in Piauí and six in Maranhão), in the 2000/2001 and 2001/2002 growing seasons, aiming to obtain regionally adapted materials. The experiments were carried out in a randomized complete block design with three replications. In the joint analysis of variance, differences were observed among environments and among cultivars, but no consistent cultivar responses to environmental variations were observed. The mean grain yield (5,934 kg.ha-1) indicates the region has a high potential for maize, able to compete with such states as Mato Grosso and Goias, traditional producers. All the cultivars tested, except the Sertanejo variety and the BRS 2110 hybrid, showed high stability in the environments. KEY-WORDS: Genotype x environment interaction; cultivar; Zea mays.
ISSN:1983-4063