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ESTABILIDADE PRODUTIVA DE HÍBRIDOS E VARIEDADES DE MILHO NO MEIO-NORTE BRASILEIRO YIELD STABILITY OF MAIZE HYBRIDS AND VARIETIES IN THE MIDDLE-NORTH REGION OF BRAZIL

Evanildes Menezes de Souza, Antônio Carlos de Oliveira, Hélio Wilson Lemos de Carvalho and 1 more

Pesquisa Agropecuária Tropical · 2007

doi:10.5216/pat.v34i3.2310 (opens in a new tab)

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Abstract

&lt;!-- @page { margin: 2cm } --&gt; &lt;p class="western" align="justify"&gt;Foram avaliadas 24 cultivares de milho (21 variedades e três híbridos), em doze ambientes da Região Meio-Norte do Brasil (seis no Estado do Piauí e seis no Estado do Maranhão), nos anos agrícolas de 2000/2001 e 2001/2002, objetivando conhecer a adaptabilidade e a estabilidade fenotípica desses materiais para fins de recomendação. Na análise conjunta de variância, observaram-se diferenças entre os ambientes, entre as cultivares e inconsistência no comportamento das cultivares diante das oscilações ambientais. A produtividade média de grãos observada (5.934 kg.ha&lt;sup&gt;-1&lt;/sup&gt;) mostra a potencialidade da região para o desenvolvimento da cultura do milho, colocando-a em condições de competir com áreas de estados como Mato Grosso e Goiás. Todos os materiais avaliados, à exceção da variedade Sertanejo e do híbrido BRS 2110, mostraram alta estabilidade nos ambientes considerados.&lt;/p&gt; &lt;p class="western" align="justify"&gt;PALAVRAS-CHAVE: Interação genótipo x ambiente; cultivar; &lt;em&gt;Zea mays&lt;/em&gt;.&lt;/p&gt;<br>&lt;!-- @page { margin: 2cm } --&gt; &lt;p class="western" align="justify"&gt;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&lt;sup&gt;-1&lt;/sup&gt;) 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.&lt;/p&gt; &lt;p class="western"&gt;KEY-WORDS: Genotype x environment interaction; cultivar; &lt;em&gt;Zea mays&lt;/em&gt;.&lt;/p&gt;

Abstract licence: CC BY

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