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HYBRID CORN PERFORMANCE IN MIDNORTHERN BRAZIL

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Author(s): MILTON JOSÉ CARDOSO | HÉLIO WILSON LEMOS DE CARVALHO | MANOEL XAVIER DOS SANTOS | MARIA DE LOURDES DA SILVA LEAL | ANTÔNIO CARLOS DE OLIVEIRA

Journal: Revista Brasileira de Milho e Sorgo
ISSN 1676-689X

Volume: 2;
Issue: 1;
Start page: 43;
Date: 2002;
Original page

Keywords: Zea mays: cultivar: interaction environment x genotype: grain yield

ABSTRACT
This work is aimed at developing the adaptability and the production stability of the hybrid corn, when submitted to different environmental conditions in Mid-northern Brazil. The medium productivity showed the great potential of the region for the production of this corn, namely São Raimundo das Mangabeiras in Maranhão and Baixa Grande do Ribeiro, Teresina and Parnaiba in Piaui. The combined analysis variance showed significant differences among the hybrid for the productivity of grains and differentiated behavior due to environmental oscillations. The hybrid that showed medium yield above general average (7,166 kg.ha-1 ), adapted better, mainly the hybrid A 2560 for the bi-segmented model. The hybrids BRS 3060, Zeneca 84 E 90, Zeneca 8420, DKB 350, Zeneca 85 E 03 and Colorado 32 showed a larger number of necessary requirements for the adaptation in the favorable environments. Special interest also for the hybrids that evidenced good adaptation (average higher than the general average), estimates of b1 tending towards zero and estimates of R2 > 80%, like the AG 6690, Dina 657, Agromen 3050, A 2366, AG 7575 and Agromen 2012.
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