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Search Results: 1 - 10 of 326870 matches for " Hélio Wilson Lemos de;Cardoso "
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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
Milton José Cardoso,Hélio Wilson Lemos de Carvalho,Ant?nio Carlos de Oliveira,Evanildes Menezes de Souza
Pesquisa Agropecuária Tropical , 2007, DOI: 10.5216/pat.v34i3.2310
Abstract: Foram avaliadas 24 cultivares de milho (21 variedades e três híbridos), em doze ambientes da Regi o Meio-Norte do Brasil (seis no Estado do Piauí e seis no Estado do Maranh o), nos anos agrícolas de 2000/2001 e 2001/2002, objetivando conhecer a adaptabilidade e a estabilidade fenotípica desses materiais para fins de recomenda o. Na análise conjunta de variancia, observaram-se diferen as entre os ambientes, entre as cultivares e inconsistência no comportamento das cultivares diante das oscila es ambientais. A produtividade média de gr os observada (5.934 kg.ha-1) mostra a potencialidade da regi o para o desenvolvimento da cultura do milho, colocando-a em condi es de competir com áreas de estados como Mato Grosso e Goiás. Todos os materiais avaliados, à exce o da variedade Sertanejo e do híbrido BRS 2110, mostraram alta estabilidade nos ambientes considerados. PALAVRAS-CHAVE: Intera o genótipo x ambiente; cultivar; Zea mays. 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 Maranh o), 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.
Adaptabilidade e estabilidade de cultivares de milho no Nordeste brasileiro no triênio 1998 a 2000
Carvalho Hélio Wilson Lemos de,Leal Maria de Lourdes da Silva,Cardoso Milton José,Santos Manoel Xavier dos
Pesquisa Agropecuária Brasileira , 2002,
Abstract: Foram avaliadas 22 cultivares de milho (variedades, híbridos e popula es) em 45 ambientes do Nordeste brasileiro, no triênio 1998 a 2000, objetivando conhecer a adaptabilidade e a estabilidade desses materiais para fins de recomenda o. Utilizou-se delineamento experimental em blocos ao acaso com três repeti es. A análise de variancia conjunta mostrou inconsistência no comportamento das cultivares diante das varia es ambientais. Os híbridos mostraram melhor adapta o que as variedades e popula es, constituindo-se em alternativas viáveis para os produtores que investem em tecnologias modernas de produ o; sobressaíram-se Cargill 333 B, AG 1051 e Zeneca 8501. As variedades Sertanejo, AL 25, S o Francisco, S o Vicente, Asa Branca e BR 106 s o importantes nos sistemas de produ o dos pequenos e médios produtores rurais da regi o.
Adaptabilidade e estabilidade de cultivares e híbridos de milho no Nordeste brasileiro no ano agrícola de 1998
Carvalho Hélio Wilson Lemos de,Leal Maria de Lourdes da Silva,Cardoso Milton José,Santos Manoel Xavier dos
Pesquisa Agropecuária Brasileira , 2001,
Abstract: Durante o ano agrícola de 1998, na Regi o Nordeste do Brasil, foram realizados experimentos em rede, em blocos casualizados com três repeti es, envolvendo a avalia o de 25 cultivares (cultivares e popula es) e de 30 híbridos de milho em dezenove e dezesseis ambientes, respectivamente, objetivando conhecer adaptabilidade e estabilidade dessas cultivares para fins de recomenda o. Os híbridos apresentaram maiores rendimentos, em média, 21,4% mais que as cultivares. Nos ensaios envolvendo cultivares e popula es, o híbrido Cargill 909, utilizado como testemunha, teve um rendimento superior, tanto nos ambientes desfavoráveis quanto nos favoráveis. As cultivares AL 30, BR 5028, BR 106, BR 5011, BR 5033, Sintético Dentado, Sintético Duro e a popula o CMS 50 expressaram boa adapta o e estabilidade de produ o no Nordeste brasileiro. Nos ensaios envolvendo híbridos, Dina 1000, Cargill 333 B, Dina 270, Braskalb XL 360, Master, AG 1051, AG 4051 e Pioneer 3041 apresentaram maior adapta o com estabilidade de produ o nos ambientes considerados. Para recomenda o específica a ambientes favoráveis destacaram-se os híbridos AG 4051 e Pioneer X 1296 B. Apesar de n o se encontrarem híbridos com adapta o específica a ambientes desfavoráveis, a recomenda o de materiais com maiores rendimentos nesses ambientes é de interesse para o agricultor, a exemplo do Dina 1000, Cargill 333 B e Braskalb XL 360.
Adaptabilidade e estabilidade de cultivares de milho no nordeste brasileiro
CARVALHO HéLIO WILSON LEMOS DE,LEAL MARIA DE LOURDES DA SILVA,SANTOS MANOEL XAVIER DOS,CARDOSO MILTON JOSE
Pesquisa Agropecuária Brasileira , 2000,
Abstract: No ano agrícola de 1997, 21 cultivares de milho foram submetidas a 26 diferentes condi es ambientais no Nordeste brasileiro, visando conhecer a estabilidade de produ o desses materiais para fins de recomenda o na regi o. Foi utilizado o delineamento experimental em blocos casualizados, com três repeti es. Foram detectadas diferen as entre os ambientes, as cultivares e comportamento diferencial das cultivares em face das varia es ambientais, na análise de variancia conjunta. A produtividade média obtida (4.301 kg/ha) mostra o bom potencial para a produtividade das cultivares avaliadas, e boa aptid o do Nordeste brasileiro para a produ o de milho. Todas as cultivares mostraram estabilidade de produ o nos ambientes considerados. Os híbridos, de melhores rendimentos que as cultivares, constituem excelentes alternativas para explora o na regi o, destacando-se, entre eles, o BR 3123, Agromen 2003 e Germinal 600, por expressarem respostas positivas à melhoria ambiental. As cultivares BR 106, BR 5011, BR 5004 e BR 5033 têm recomenda o justificada, especialmente, para pequenos e médios produtores rurais, onde certamente contribuir o para a melhoria da produtividade do milho.
Adaptabilidade e estabilidade de cultivares de milho no Nordeste brasileiro
Carvalho, Hélio Wilson Lemos de;Cardoso, Mílton José;Leal, Maria de Lourdes da Silva;Santos, Manoel Xavier dos;Tabosa, José Nildo;Souza, Evanildes Menezes de;
Pesquisa Agropecuária Brasileira , 2005, DOI: 10.1590/S0100-204X2005000500008
Abstract: forty six maize cultivars were evaluated during two years in 11 different places of brazilian northeast region. trials were carried out during the biennium 2001/2002 using experimental randomized block design, three repetitions, in order to know the adaptability and stability for cultivars recommendation. it was verified that the cultivars showed differentiated behavior among themselves in the mean of environments. the magnitude of the variance for local x cultivars interaction was more expressive than cultivars x years interaction, which suggests that the evaluations have to be done in a larger number of environments. evaluated cultivars differed in adaptability and stability, and are very important for brazilian northeast region.
Adaptabilidade e estabilidade de cultivares de milho no nordeste brasileiro
CARVALHO, HéLIO WILSON LEMOS DE;LEAL, MARIA DE LOURDES DA SILVA;SANTOS, MANOEL XAVIER DOS;CARDOSO, MILTON JOSE;MONTEIRO, ANT?NIO AUGUSTO TEIXEIRA;TABOSA, JOSE NILDO;
Pesquisa Agropecuária Brasileira , 2000, DOI: 10.1590/S0100-204X2000000600007
Abstract: the yield stability of 21 corn cultivars was submitted to 26 different environments of the brazilian northeast region during the 1997 year crop, aiming to obtain regionally adapted materials. the experiments were carried out in a completely randomized block design with three replications. significant differences were detected between environments, cultivars and differential behavior of cultivars facing environmental variations, by the analysis of variance. the obtained mean productivity of 4,301 kg/ha shows the potential of the cultivars and the good potential of the brazilian northeast region for corn crop. all the cultivars showed yield stability under the considered environments. the hybrids, which had better performance than cultivars, constitute an excellent alternative for the region, highlighting among them the br 3123, agromen 2003 and germinal 600, with positive responses to improved environment. the cultivars br 106, br 5004 and br 5033 have their recommendation justified, mostly for small and medium size growers, where they surely will contribute for the improvement of corn productivity.
Adaptabilidade e estabilidade de cultivares de milho no Nordeste brasileiro no triênio 1998 a 2000
Carvalho, Hélio Wilson Lemos de;Leal, Maria de Lourdes da Silva;Cardoso, Milton José;Santos, Manoel Xavier dos;Tabosa, José Nildo;Carvalho, Benedito Carlos Lemos de;Lira, Marcelo Abdon;
Pesquisa Agropecuária Brasileira , 2002, DOI: 10.1590/S0100-204X2002001100009
Abstract: during the years 1998 to 2000, 22 maize cultivars (varieties, hybrids and populations) were evaluated in 45 environments of the brazilian northeast region, in order to know the adaptability and the stability of those materials for recommendation purposes. the experimental design was random blocks with three repetitions. the combined analysis of variance showed inconsistency in the behavior for the cultivars due to environmental variations. the hybrids showed better adaptation than the varieties and populations, especially cargill 333 b, ag 1051 and zeneca 8501, which are viable alternatives for farmers that invest in modern technologies. the varieties sertanejo, al 25, s?o francisco, s?o vicente, asa branca and br 106 are indicated to the farming systems of the small and medium farmers.
Estabilidade de cultivares de milho em três ecossistemas do Nordeste brasileiro
CARVALHO, HéLIO WILSON LEMOS DE;LEAL, MARIA DE LOURDES DA SILVA;SANTOS, MANOEL XAVIER DOS;MONTEIRO, ANT?NIO AUGUSTO TEIXEIRA;CARDOSO, MILTON JOSé;CARVALHO, BENEDITO CARLOS LEMOS DE;
Pesquisa Agropecuária Brasileira , 2000, DOI: 10.1590/S0100-204X2000000900010
Abstract: the production stability of twelve corn genotypes was evaluated in 75 different environments of the coastal tablelands, "agreste" and "sert?o" ecosystems, during the 1995, 1996 and 1997 growing seasons in randomized block design with three replications, aiming at the recommendation of adapted materials. high mean productivities were slightly similar at ecosystem level. coastal tablelands should be highlighted as a new competitive area of corn production. hybrids showed better environment adaptation than cultivars, br 3123 showing the best yielding in all the three ecosystems in spite of being the most exigent under unfavourable conditions. except for br 2121, all hybrids had good production stability in all of the environments considered (r2>80%). among the cultivars with better adaptation, only br 106 showed low stability in these environments (r2=75%). for the brazilian northeast, br 5033 cultivar was the ideal genotype proposed by this model.
Adaptabilidade e estabilidade de cultivares e híbridos de milho no Nordeste brasileiro no ano agrícola de 1998
Carvalho, Hélio Wilson Lemos de;Leal, Maria de Lourdes da Silva;Cardoso, Milton José;Santos, Manoel Xavier dos;Carvalho, Benedito Carlos Lemos de;Tabosa, José Nildo;Lira, Marcelo Abdon;Albuquerque, Marcondes Maurício;
Pesquisa Agropecuária Brasileira , 2001, DOI: 10.1590/S0100-204X2001000400006
Abstract: for the agricultural year of 1998, data from a network of experiments using a randomized block design with three replications for 25 corn cultivars and 30 hybrids cultivated in nineteen and sixteen different environments, respectively, were analysed, aiming to obtain knowledge concerning to adaptability, and yield stability of cultivars in each environment. the hybrids showed an average performance 21.4% higher than the cultivars. in the experiments involving cultivars and populations, the cargill hybrid 909 utilized as control, had a higher yield either under unfavorable or favorable environments. the yield of al 30, br 5028, br 106, br 5011, br 5033, "sintético dentado", "sintético duro" cultivars and the cms 50 population expressed good adaptation and yield stability under northeastern brazil conditions. in the experiments with hybrids, dina 1000, cargill 333 b, dina 270, braskalb xl 360, master, ag 1051, ag 4051 and pioneer 3041 expressed adaptation and yield stability higher than the other hybrids tested under the different environmental conditions. at favorable environmental conditions, the hybrids ag 4051 and pioneer x 1296 b were the best ones. even though no hybrids were specifically indicated for unfavorable environment, the recommendation of materials showing higher yields at unfavorable environments are interesting for the corn grower. this is the case of the dina 1000, cargill 333 b and braskalb xl 360.
Identifica??o de cultivares de milho com base na análise de estabilidade fenotípica no meio-norte brasileiro
Cardoso, Milton José;Carvalho, Hélio Wilson Lemos de;Rocha, Leonardo Melo Pereira;Pacheco, Cleso Ant?nio Patto;Guimar?es, Lauro José Moreira;Guimar?es, Paulo Evaristo de Oliveira;Parentony, Sidney Netto;Oliveira, Ivênio Rubens de;
Revista Ciência Agron?mica , 2012, DOI: 10.1590/S1806-66902012000200018
Abstract: the objective of this study was to determine the adaptability and stability of varieties and hybrids of corn, when subjected to different environmental conditions in the mid-northern region of brazil. for this, we proceeded to the assessment of 22 hybrids in an experimental grid, and 20 cultivars (varieties and hybrids) in another grid, in different environments, using an experimental design of randomized blocks with three replications. the hybrids showed better adaptation than did the varieties. in both grids differences were detected among genotypes and environments, and inconsistent behavior of these genotypes was detected across the average of the environments. the cultivars differed in their adaptability in unfavorable environments. among those cultivars which best adapted (b0>overall average), the hybrids pl 1335 and shs 5050, and the variety shs 500, showed to be demanding under unfavorable conditions (b1>1) and the hybrid shs 5070 and variety al 34, proved to be undemanding under these same conditions (b 1<1). the hybrids which demonstrated wide adaptability (b0> overall average and b1=1) such as: dkb 390, das 8480, dkb 455, brs 1010 and brs 1030, among others, become important for agriculture in the region.
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