Análise dialélica de linhagens de milho na safrinha

Aguiar, Celso Gonçalves de; Scapim, Carlos Alberto; Pinto, Ronald José Barth; Júnior, Antônio Teixeira do Amaral; Silvério, Lucas; Andrade, Carlos Alberto de Bastos

doi:10.1590/s0103-84782004000600010

Cited by 11 publications

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References 11 publications

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“…It is noteworthy that GY was significantly influenced by the effects of GCA and SCA, with no interaction of these estimates with the growing seasons evaluated (Table 1). These results differ from some studies reporting the interaction between GCA and SCA with environments (Aguiar et al 2004;Locatelli et al, 2002).…”

Section: Resultscontrasting

confidence: 99%

“…The nature of the interaction is related to intrinsic factors of the cultivar and of great importance in plant breeding. In general, there is a strong interaction between genotypes and environments in corn, depending on the diversity of the environments and the magnitude of the genetic background (Aguiar et al, 2004;Pfann et al, 2009). These results are supported by the strong interaction between genotypes and environments for traits related to forage production, highlighting the yield of grains and dry matter (Oliboni et al, 2013;Oliveira et al, 2007).…”

Section: Resultsmentioning

confidence: 93%

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Análise dialélica e depressão endogâmica de híbridos forrageiros de milho para características agronômicas e de qualidade bromatológica

et al. 2015

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This study aimed to estimate the combining ability and inbreeding depression of corn hybrids for agronomic traits and forage quality. Nine corn hybrids, 36 F1 combinations from a diallel, 9 S1 populations and two checks were evaluated in two experiments in a randomized complete block design with three replications, in the 2009/2010 and 2010/2011 growing seasons. The parents Impacto, CD304 and DKB390 are recommended to form a composite to be subjected to a recurrent selection program aiming to improve forage production. Crosses between Impacto and parents DKB390, P30P34 and P30B39 are promising to increase forage quality by reducing the fiber content and also by increasing the protein content, being recommended for extracting inbred lines and interpopulation improvement. High inbreeding depression for grain yield was detected, indicating that non-additive effects contributed to the inheritance of the trait.

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Section: Resultscontrasting

confidence: 99%

Section: Resultsmentioning

confidence: 93%

Análise dialélica e depressão endogâmica de híbridos forrageiros de milho para características agronômicas e de qualidade bromatológica

et al. 2015

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“…Oliboni et al (2013), who used diallel analysis, obtained parents with the potential to segregate populations for inter-population improvement because of the increased ability for EH and husked ear productivity. Aguiar et al (2004) However, this can only be predicted for hybrid production and evaluation because along with parent means, estimates can be affected (Guo et al, 2013). Per se, parent means are not reliable parameters to predict hybrids.…”

Section: Resultsmentioning

confidence: 99%

An accurate prediction of maize crosses using diallel analysis and best linear unbiased predictor (BLUP)

Oliveira

Buzinaro

Revolti

et al. 2016

Chilean J. Agric. Res.

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A major obstacle in corn (Zea mays L.) breeding programs is how to obtain strains which, when combined, ensure increased productivity in all crop characteristics. Therefore, the objective of this study was to evaluate the prediction efficiency of hybrid maize using diallel analysis and the best linear unbiased predictor (BLUP). Eight synthetic varieties were sown in a diallel scheme and the hybrid and their parents were then evaluated in three separate environments; both combining ability and predicted breeding values (BLUPs) were estimated. Correlations between the BLUP and combining abilities were also obtained. Combining ability analysis revealed that both additive and non-additive types of gene action were important in the studied traits. There was a moderate to high correlation between the mean square of the combining ability and the predicted breeding values. This shows that BLUP can be used to select the best parents for different traits, especially for ear height and ear position, which had the highest correlations. The parent VAR-01 had significant general combining ability (GCA) values, and it can be used in crosses to reduce plant height, ear height, and ear position while the parent VAR-06 can participate in crosses to increase ear height, plant height, and ear position. The result obtained for combining ability was moderately to highly consistent with BLUP results, but selection must be carefully undertaken.

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“…Este fato também foi observado em outras ocasiões, em experimentos de milho realizados no Paraná (PFANN et al, 2009;AGUIAR et al, 2004). Os coeficientes de variação obtidos são considerados médios para rendimento de grãos (11,88%), altura de plantas (4,95%) e altura de inserção da espiga (9,54%), de acordo com a classificação proposta por Scapim, Carvalho e Cruz (1995), demonstrando boa precisão experimental.…”

Section: Resultsunclassified

“…São desejáveis aquelas combinações híbridas com estimativas de capacidade específica de combinação mais favorável, que envolvam pelo menos um dos genitores que tenha apresentado o mais favorável efeito de capacidade geral de combinação (BORDALLO et al, 2005, AGUIAR et al, 2004VON PINHO;FERREIRA, 2001).…”

Section: Introductionunclassified

Análise dialélica na avaliação do potencial de híbridos de milho para a geração de populações-base para obtenção de linhagens

Oliboni¹,

Faria

Neumann

et al. 2013

Sem. Ci. Agr.

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ResumoDoze híbridos comerciais de milho foram intercruzados, conforme um dialelo completo. Esses genótipos e três testemunhas foram avaliados em látice triplo na região Centro-Sul do Paraná, nos municípios de Laranjeiras do Sul, Guarapuava e Cantagalo. Os dados referentes à produção de espigas despalhadas, altura de planta e altura de espiga foram submetidos à análise dialélica conjunta, segundo o método 4 de Griffing, em que foram avaliados apenas os F 1 . Foi verificado efeito significativo da capacidade geral de combinação (CGC), da capacidade específica de combinação (CEC) e da interação 'CGC x locais' para todos os caracteres. A interação 'CEC x locais' foi não significativa para as características avaliadas. Os híbridos P30F53 e AS1575 apresentaram estimativas positivas e elevadas da CGC para peso de espigas despalhadas e alta produtividade, mostrando-se promissores para geração de populações com bom potencial para obtenção de linhagens superiores no melhoramento intrapopulacional. Os híbridos P30F44 e 2B688 apresentam potencial para a geração de populações para melhoramento interpopulacional, pois apresentaram elevada média da produtividade de espigas despalhadas, estimativas positivas da CGC e da CEC, além de estimativas favoráveis para altura de espiga. Palavras-chave: Capacidade de combinação, dialelo, milho híbrido, Zea mays L AbstractTwelve commercial maize hybrids were intercrossed in a complete diallel. These genotypes and three checks were evaluated in lattice design with three replications in the South-Central region of Parana State, in Laranjeiras do Sul, Guarapuava and Cantagalo. Data of yield of husked ear, plant height and ear height were submitted to joint diallel analysis according to Griffings method 4, i.e. only F 1 were evaluated. Significant effect was found for general combining ability (GCA), specific combining ability (SCA) and interaction 'GCA x locations' for all characters. The interaction 'SCA x location' was not significant for both characters. Hybrids P30F53 and AS1575 showed positive and high estimates of GCA for yield of husked ear and high mean of yield, being interesting for the generation of populations with potential for intrapopulation breeding to obtain superior lines. The hybrids P30F44 and 2B688 are potentially indicated to generate populations for interpopulational breeding, since their high in yield of husked ears, positive GCA and SCA estimates, besides favorable estimates for ear height.

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Análise dialélica de linhagens de milho na safrinha

Abstract: RESUMO

Cited by 11 publications

References 11 publications

Análise dialélica e depressão endogâmica de híbridos forrageiros de milho para características agronômicas e de qualidade bromatológica

Análise dialélica e depressão endogâmica de híbridos forrageiros de milho para características agronômicas e de qualidade bromatológica

An accurate prediction of maize crosses using diallel analysis and best linear unbiased predictor (BLUP)

Análise dialélica na avaliação do potencial de híbridos de milho para a geração de populações-base para obtenção de linhagens

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