Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados Scientia Agricola (4) Autor Miranda Filho,José Branco de (4) Giaveno,Carlos Daniel (2) Farias Neto,Austeclinio L. de (1) Farias Neto,Austeclínio Lopes (1) Palavra-chave Divergent selection (4) Zea mays (3) Acid soils (2) Ear height (1) Genetic correlation (1) Inbreeding depression (1) Seedling (1) Stress (1) Tassel characters (1) Tassel size (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Info:eu-repo/semantics/report (1) Ano 2002 (2) 2001 (1) 2000 (1) País Brazil (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Field comparison between selection methods at the maize seedling stage in relation to aluminum tolerance Scientia Agricola Giaveno,Carlos Daniel; Miranda Filho,José Branco de. Selection and breeding for aluminum tolerance is a useful approach to increase maize (Zea mays L.) grain yield in acid soils. The objective of this work was the comparison between two screening approaches for the development of Al tolerant maize populations. One cycle of divergent selection for aluminum tolerance, using both nutrient solution and pots with acid soil, were completed in the maize population SIKALQ. The four sub-populations selected through both selection procedures were compared with the original population and checks in field trials repeated over locations. Eight environments stratified into four groups varying from non acid to high aluminum saturation were used. Three variables were analyzed for comparisons of methodologies: grain yield,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; Acid soils; Seedling; Divergent selection. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000200029 Selection methods for maize seedlings in greenhouse as related to aluminum tolerance Scientia Agricola Giaveno,Carlos Daniel; Miranda Filho,José Branco de. Genetic improvement is a useful approach to increase aluminum tolerance in maize. This experiment was carried out to compare two screening techniques under greenhouse conditions and estimate the association between the results obtained for both bioassays with grain yield. Nutrient solution (NS) and pots with acid soil (AS) were utilized as screening methodologies to perform one cycle of divergent selection for aluminum tolerance in the tropical maize population SIKALQ. The four sub-populations obtained by both approaches were compared with the original and checks in a greenhouse and in multilocation field trials. Evaluation under the conditions of NS and AS showed that the populations with the best performances were those selected for aluminum tolerance... Tipo: Info:eu-repo/semantics/report Palavras-chave: Zea mays; Acid soils; Stress; Divergent selection. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000400028 Inbreeding in two maize subpopulations selected for tassel size Scientia Agricola Farias Neto,Austeclinio L. de; Miranda Filho,José Branco de. The present work was based on the evaluation of full sib and S1 progenies from the maize (Zea mays L.) population ESALQ-PB1 after six cycles of divergent selection for tassel size. The following traits were analyzed: plant height , ear height, tassel branch number, tassel length, and tassel weight. For all traits, the experimental units were means of three plants per plot. Progenies were evaluated in eleven experiments (completely randomized blocks) with three replications in Piracicaba -- SP, Brazil. Means of inbred (m1) and non-inbred (m0) progenies were used to estimate inbreeding depression (I = m1 -- m0) and the contribution of homozygotes (mu0 + a*) and heterozygotes (d*) to the population mean. Considering the five traits under study, inbreeding... Tipo: Info:eu-repo/semantics/article Palavras-chave: Inbreeding depression; Divergent selection; Tassel characters. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162000000300018 Genetic correlation between traits in the ESALQ-PB1 maize population divergently selected for tassel size and ear height Scientia Agricola Farias Neto,Austeclínio Lopes; Miranda Filho,José Branco de. Full-sib and selfed (S1) progenies were obtained from sub-populations of ESALQ-PB1, divergently selected for tassel size (T+ and T-) and ear height (E+ and E-), and used for estimating genetic and phenotypic correlation coefficients between traits. The analyzed traits were: EW- total ear weight (g/plant), PH- plant height (cm), EH- ear height (cm), TB- tassel branch number and TL- tassel length. The highest genetic (rG) and phenotypic (rF) correlation was observed for the combination PH x EH, as expected, with average of 0.800 and 0.778, respectively over sub-populations and locations. It is apparent that divergent selection for tassel size did not affect greatly the correlation between PH and EH in the full sib progenies, but in the inbred progenies the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; Genetic correlation; Divergent selection; Tassel size; Ear height. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162001000100018 Registros recuperados: 4 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco