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Correlation and path analysis in components of grain yield of cowpea genotypes 124
Almeida,Wener Santos de; Fernandes,Francisco Ronaldo Belém; Teófilo,Elizita Maria; Bertini,Cândida Hermínia Campos de Magalhães.
This study aimed at verifying the effect of genotype x environment interaction on the relative contribution of yield components and final production of different cowpea genotypes. For this, data of yield components of 22 cowpea genotypes were evaluated in four environments in the State of Ceará. A one-way ANOVA tested the variability between genotypes and the Scott-Knott test compared the mean values of the genotypes. The correlations were estimated by a path analysis. A differentiated response from the genotypes to each environment was observed for all traits examined, indicating the need to perform the test for each situation separately. The number of pods per plant is the yield component with great potential of genetic gain in additional cycles of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vigna unguiculata; Genotype x environment; Direct and indirect effects.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000400010
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The use of different clustering methods in the evaluation of genetic diversity in upland cotton 124
Araújo,Laíse Ferreira de; Almeida,Wener Santos de; Bertini,Cândida Hermínia Campos de Magalhães; Vidal Neto,Francisco das Chagas; Bleicher,Ervino.
The continuous development and evaluation of new genotypes through crop breeding is essential in order to obtain new cultivars. The objective of this work was to evaluate the genetic divergences between cultivars of upland cotton (Gossypium hirsutum L.) using the agronomic and technological characteristics of the fibre, in order to select superior parent plants. The experiment was set up during 2010 at the Federal University of Ceará in Fortaleza, Ceará, Brazil. Eleven cultivars of upland cotton were used in an experimental design of randomised blocks with three replications. In order to evaluate the genetic diversity among cultivars, the generalised Mahalanobis distance matrix was calculated, with cluster analysis then being applied, employing various...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gossypium hirsutum L.; Fibre quality; Agronomic characteristics.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000200012
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Correlations and path analysis in components of fiber yield in cultivars of upland cotton 53
Araújo,Laíse Ferreira de; Almeida,Wener Santos de; Bertini,Cândida Hermínia Campos de Magalhães; Vidal Neto,Francisco das Chagas; Bleicher,Ervino.
This study evaluated the relative contribution of agronomic and technological components on the fiber yield in upland cotton cultivars. The experiment was carried out with 11 upland cotton cultivars in a completely randomized blocks design with three replications. Initially, we performed analysis of variance, with the F test at 5% probability for the effect of cultivar as fixed effects as well as block and environment effects as random. Then the values were ordered according to cluster test Scott-Knott, at 5% probability level. The significance of the null hypothesis that all possible canonical correlations are null was evaluated using the chi-square test. The correlations were estimated through the path analysis. By examining the canonical correlations...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gossypium hirsutum; Fiber quality; Agronomic traits.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052012000300002
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Identificação de genótipos de feijão-caupi tolerantes a salinidade avaliado por meio de método multivariado 65
Almeida,Wener Santos de; Belém,Francisco Ronaldo Fernandes; Bertini,Cândida Hermínia Campos de Magalhães; Pinheiro,Marcelo de Souza; Teófilo,Elizita Maria.
Objetivou-se com este trabalho identificar genótipos tolerantes ao estresse provocado pela solução de NaCl e pela mistura de NaCl, CaCl2 e MgCl2 na água de irrigação, nos estádios iniciais de desenvolvimento. Os níveis de condutividade elétrica do extrato de saturação foram: 0, 2,5; 5,0 e 7,5dS m-1. A tolerância do feijão-caupi foi avaliada através da redução relativa de matéria seca da parte aérea de cada genótipo. O genótipo CE-182 mostrou-se mais tolerante nos níveis 2,5; 5,0 e 7,5dS m-1 na água salinizada com solução de NaCl. Na solução de mistura dos sais, os genótipos CE-9 e CE-551 foram os mais tolerantes. De acordo com os resultados obtidos pelo agrupamento, utilizando-se o método hierárquico UPGMA, verifica-se que as combinações mais promissoras...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vigna unguiculata; Variabilidade genética; Análise multivariada.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011001100006
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