Correlações e análise de trilha em linhagens de soja semeadas em diferentes épocas

Carvalho, C. G. P. de; Arias, Carlos A.; Toledo, J.F.; Oliveira, Marcelo Fernandes de; Vello, Natal Antônio

doi:10.1590/s0100-204x2002000300012

Cited by 42 publications

(36 citation statements)

References 11 publications

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“…However, genotypically correlated characteristics that are not phenotypically correlated may not be of practical use in selection, as selection is generally based on phenotype (CARVALHO et al, 2002). Thus, both types of correlation were considered in this study to facilitate the decision about the efficiency of these indirect selection criteria.…”

Section: Resultsmentioning

confidence: 99%

Cycle, canopy architecture and yield of common bean genotypes (Phaseolus vulgaris) in Santa Catarina State

et al. 2013

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ABSTRACT. The objective of this study was to identify the phenotypic and genotypic correlations between the plant cycle and plant habit and the effect on yield in landrace bean genotypes. The experiment was conducted in Joaçaba and Lages, Santa Catarina State for the 2008/2009 crop using 26 bean genotypes: 22 landrace and 4 commercial genotypes obtained from the UDESC. We evaluated the number of days from emergence to flowering, number of days from flowering to physiological maturity and number of days from emergence to physiological maturity in relation to the genotypes' cycle. The aerial plant architecture characteristics evaluated were the growth habit, plant habit, plant height, stem diameter, height of the first pod insertion and number of nodes on the main stem. Trail analysis showed that there was a positive correlation between the emergence-to-flowering period and yield and that the emergencephysiological maturity; flowering-physiological maturity showed a negative correlation to the yield in both locations. Therefore, short-cycle genotypes, especially those with a reduced post-flowering period, produced increased yields. The aerial plant architecture characteristics showed phenotypic and genotypic positive correlations with the yield in both environments. To increase yield, the reproductive period needs to coincide with periods of the greatest photosynthetically active radiation.

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Section: Resultsmentioning

confidence: 99%

Cycle, canopy architecture and yield of common bean genotypes (Phaseolus vulgaris) in Santa Catarina State

et al. 2013

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“…However, yield is a complex trait resulting from the expression and association of different components (Carvalho et al 2002). Thus, knowledge of the degree of this association through correlation studies can identify traits that could be used as indirect selection criteria for yield or as secondary traits, improving the efficiency of the selection process.…”

Section: Introductionmentioning

confidence: 99%

Correlations and path analysis of morphological and yield traits of cactus pear accessions

Neder

Costa

Edvan

et al. 2013

Crop Breed. Appl. Biotechnol.

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-The objectives of this study were to evaluate the relationships between morphological characteristics and fresh matter yield of cactus pear and identify their direct and indirect effects. Nineteen accessions were evaluated for the following traits: number (NCl), thickness (ThCl), length (LCl) and width (WCl) of cladodes, plant height (PH) and plant width (PW), and green matter yield (GMY), dry matter yield (DMY) and dry matter percentage (DM). The correlations were estimated, and path analysis was performed by the method proposed by Wright. GMY was strongly correlated with DMY, allowing indirect selection for this trait. NCl and ThCl had a direct effect on GMY and can be used for indirect selection or as secondary traits in the selection process. Given the lack of significant correlations between MS and DMY, it is possible to select a palm variety with high DMY and DM.

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“…A produtividade é um caráter complexo e resultante da expressão e associação de diferentes componentes (Carvalho et al, 2002), tais como, a pureza genética, a sanidade, a qualidade e o vigor das sementes utilizadas. Com a participação dos efeitos do ambiente na manifestação fenotípica, qualquer mecanismo que auxilie o pesquisador a conhecer os efeitos que interagem no comportamento de um caráter permite maior eficiência em sua seleção (Kurek et al, 2001).…”

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Correlação e análise do coeficiente de trilha dos componentes do rendimento de sementes de grama-forquilha

Lopes

Franke

2011

R. Bras. Zootec.

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RESUMO -Objetivou-se com este trabalho, por meio de uma análise de trilha para rendimento de sementes de gramaforquilha (Paspalum notatum Flügge var. notatum), obter informações básicas para utilização em estratégias de manejo para maior produção de sementes e, consequentemente, maior ressemeadura natural, proporcionando, assim, condições para maior persistência da espécie na pastagem. Foram analisadas as seguintes variáveis: número de perfilhos vegetativos, número de perfilhos reprodutivos, número de racemos/inflorescência, número de sementes/inflorescência, peso de mil sementes e rendimento de sementes. A variável que mais se correlacionou com o rendimento de sementes foi o número de perfilhos reprodutivos (r = 0,94), e essa correlação se deu praticamente apenas pelo efeito direto dessa variável. Entre as demais variáveis, destacou-se o número de perfilhos vegetativos, com coeficiente de correlação de -0,83 e efeitos indiretos sobre os demais componentes do rendimento de sementes. O número de perfilhos reprodutivos parece ser a principal característica a ser considerada na busca de maior produção de sementes de Paspalum notatum.Palavras-chave: componentes do rendimento de sementes, perfilho reprodutivo, perfilho vegetativo, peso de sementes Correlation and path coefficient analyses of seed yield components in the bahia grass (Paspalum notatum Flügge var. notatum)ABSTRACT -The objective of this work was, through a path analysis of seed yield in Paspalum notatum, to obtain basic information for using in management strategies to improve seed production and consequently, high natural reseeding and a better persistence of the species in the pasture. The following variables were analyzed: number of vegetative tiller, number of reproductive tiller, number of raceme/inflorescence, number of seeds/inflorescence, weight of 1000 seeds and seed yield.The most correlated variable with seed yield was the number of reproductive tiller (r = 0.94), and this occurred because its direct effect. Among the other variables, number of vegetative tiller also had a high correlation coefficient (r = -0.83) and indirect effects on the other components. The number of reproductive tiller seems to be the main characteristic to be considered when searching for a higher seed production in Paspalum notatum. IntroduçãoInúmeros acessos de Paspalum notatum têm sido incorporados a experimentos agronômicos, devido ao bom valor forrageiro, à rapidez de estabelecimento e a uma densa cobertura do solo. Steiner (2005), testando genótipos de P. notatum nativos do Rio Grande do Sul, obteve expressivos valores de produção de matéria seca total (MST), próximas a 14.000 kg de MST/ha, provando o potencial produtivo desta espécie nativa, chegando a níveis de produção próximos de cultivares de espécies tropicais introduzidas (Cecato et al., 2000).A utilização da semente, como veículo de propagação de espécies forrageiras, representa importante marco no desenvolvimento da pecuária nacional, ao promover uma rápida disseminação de novos materiais. A produtivida...

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Correlações e análise de trilha em linhagens de soja semeadas em diferentes épocas

Cited by 42 publications

References 11 publications

Cycle, canopy architecture and yield of common bean genotypes (Phaseolus vulgaris) in Santa Catarina State

Cycle, canopy architecture and yield of common bean genotypes (Phaseolus vulgaris) in Santa Catarina State

Correlations and path analysis of morphological and yield traits of cactus pear accessions

Correlação e análise do coeficiente de trilha dos componentes do rendimento de sementes de grama-forquilha

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