Análise de trilha de caracteres forrageiros do capim-elefante (Pennisetum purpureum Schum.)

Daher, Rogério Figueiredo; Pereira, Antônio Vander; Pereira, Messias Gonzaga; Lédo, Francisco José da Silva; Amaral, Antônio Teixeira do; Rocabado, Juan Manuel Anda; Ferreira, Cláudia Fortes; Tardin, F. D.

doi:10.1590/s0103-84782004000500032

Cited by 27 publications

(27 citation statements)

References 6 publications

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“…Similar results were also reported for elephantgrass (Assis et al, 2010) and Brachiaria brizantha (Basso et al, 2009). Nonetheless, Daher et al (2004) found high heritability for the leaf:culm ratio and lower for total dry matter production. According to Souza Sobrinho et al (2005), the leaf:culm ratio expresses the variations in the proportion between leaf blade and culm, which is very important for the selection of grazing-tolerant genotypes.…”

Section: Resultssupporting

confidence: 85%

Genetic gain in apomictic species of the genus Paspalum

et al. 2017

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1The objective of this work was to provide means to obtain genetic gain in apomictic species of the genus Paspalum by identifying traits that simultaneously show high correlation and heritability. Thus, to determine the amount of phenotypic variation due to genetic and environmental effects and the degree of association between leaf dry matter production and other traits of forage interest that are easy to select and measure will bring agility and economy in the selection of forage species. The experiment was conducted in the years 2009/10 and 2010/11 in the municipalities of Eldorado do Sul and Augusto Pestana, RS, Brazil, in a randomized complete block design with three replicates. The increase in the direct selection pressure on total and leaf dry matter of apomictic accesses of the genus Paspalum is enhanced by a greater contribution of genetic effects than environmental effects on the composition of the phenotypic variance. Efficient genetic gain in leaf production is achieved by indirect selection of total dry matter, which is a trait of high heritability and easy to select and measure.

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Section: Resultssupporting

confidence: 85%

Genetic gain in apomictic species of the genus Paspalum

et al. 2017

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“…Lower h² estimates were obtained by Silva (2006) for DM production (39%) and leaf blades DM content (54%). Daher et al (2004) found h² values that varied from 33%, for DM production, to 84% for plant height. Nevertheless, h² estimates are peculiar to the evaluated genotypes set and to the determined environmental condition (Acquaah, 2007).…”

Section: Resultsmentioning

confidence: 95%

“…According to Daher et al (2004), the correlation between two variables may be phenotypic, genotypic or environmental, but, only the genotypic correlations involve an inheritable relation. Despite being highly used, the simple genotypic correlation does not allow a more detailed evaluation of the association between characters.…”

Section: Introductionmentioning

confidence: 99%

Association between the morphological and productive characteristics in the selection of elephant grass clones

et al. 2011

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“…A magnitude do coeficiente de determinação é superior a encontrada por Daher et al (2004) em capimelefante, como também a de outras culturas como canola (Coimbra et al, 2005), bata-doce (Cavalcant et al, 2006), cana-de-açúcar (Ferreira et al, 2007e Silva et al, 2009.…”

Section: Resultsunclassified

“…Quando a colinearidade foi levada em conta, o efeito direto da altura das plantas no PMS caiu para 0,001 (Tabelas 1 e 2 a 4). Baixo efeito direto da altura de plantas no PMS também foi detectado por Daher et al (2004) avaliando clones de capim-elefante. Em cana-de-açúcar a altura de plantas também apresentou baixo efeito sobre a variável básica tonelada de cana por hectare (Ferreira et al, 2007;Silva et al, 2009).…”

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Associação entre caracteres e análise de trilha na seleção de progênies de meios-irmãos de Brachiaria ruziziensis

Sobrinho¹,

Silva²,

Köpp

2011

Rev. Ceres

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Association between traits and path analysis in half-sib progeny selection of Brachiaria ruziziensisHigh association between fresh and dry mass weight can facilitate early selection of superior genotypes of B. ruziziensis R. Germ. & C.M. Evrard. The aim of this study was to verify the associations between traits in the selection of B. ruziziensis genotypes. The experiment was arranged in a complete randomized block design with two replications. The traits evaluated were height and vigor of plants; weight of fresh mass and percentage of dry matter of the whole plant, stem and leaf; dry mass weight of total herbage, stem, and leaf and the ratio between productivity of leaf and stem. Estimation of simple correlations and path analysis were performed considering the dry mass weight as the main variable. The correlations were mostly low, but significant higher correlations were observed between fresh mass weight and dry mass weight, dry weight of the stem and dry weight of leaves. The path coefficients showed that the direct effects of different explanatory variables on the dry mass weight were mostly low. More significant direct effects were obtained with fresh mass weight, stem dry weight and leaf dry weight, indicating that the fresh mass weight allows for the indirect selection for dry mass weight. Associação alta entre peso de massa seca e peso de massa verde pode facilitar a seleção antecipada de genótipos superiores de B. ruziziensis. Objetivou-se neste estudo verificar as associações entre características morfo-agronômi-cas na seleção de genótipos de B. ruziziensis. O delineamento experimental foi o de blocos completos casualizados com duas repetições. Foram avaliadas as características altura e vigor das plantas, peso de massa verde e porcentagem de matéria seca da planta inteira, do caule e da folha, peso de massa seca da forragem total, de caule, e de folha e, relação entre produtividade de folha e caule de massa verde. As análises consistiram da estimação das correlações simples entre os caracteres e da análise de trilha considerando o peso de massa seca total como variável básica e as demais explicativas. Correlações mais elevadas foram observadas entre peso de massa seca e peso de massa verde, peso seco de caule e peso de massa verde e, peso seco de folhas e peso de massa verde. Pelos coeficientes de trilha, verificou-se que os efeitos diretos das diferentes variáveis explicativas sobre o peso de massa seca foram, em sua maioria, baixos. Os efeitos diretos mais relevantes sobre o peso de massa seca foram verificados via peso de massa verde, peso seco de caule e peso seco de folhas, indicando que o peso de massa verde viabiliza a seleção indireta para peso de massa seca. Palavras-chaves:Correlação, seleção indireta, melhoramento de forrageiras.

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Análise de trilha de caracteres forrageiros do capim-elefante (Pennisetum purpureum Schum.)

Cited by 27 publications

References 6 publications

Genetic gain in apomictic species of the genus Paspalum

Genetic gain in apomictic species of the genus Paspalum

Association between the morphological and productive characteristics in the selection of elephant grass clones

Associação entre caracteres e análise de trilha na seleção de progênies de meios-irmãos de Brachiaria ruziziensis

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