Progênies superiores de soja resistentes ao tipo 3 do nematóide de cisto da soja

Oliveira, Roberto Carlos de; Mauro, Antônio Orlando Di; Unêda-Trevisoli, Sandra Helena; Santos, Jaime Maia Maia dos; Oliveira, João Ademir de; Pérecin, Dilermando; Arantes, N. E.

doi:10.1590/s0100-204x2005000800003

Cited by 2 publications

(3 citation statements)

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“…By relating the Tocher's optimization method and the UPGMA, there was a concordance between them, and 5 groups show a similar constitution. The most dissimilar soybean cultivars are combined in rather distant groups; they may be regarded as favorable in artificial crossbreeding (Oliveira et al, 2005). However, in addition to dissimilarity, it is necessary that the parents correlate high average values for the other desired agronomic traits Peluzio et al, 2014).…”

Section: Resultsmentioning

confidence: 99%

Genetic divergence between soybean cultivars grown in the Cerrado in Southwestern Piau, Brazil

Sousa¹,

Chaves²,

Heberle³

et al. 2016

Afr. J. Agric. Res.

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Knowing plant traits and their contribution to genetic diversity is key to identify favorable genotypes and breed new cultivars. This article aims to describe and quantify the genetic divergence between soybean cultivars grown in the Cerrado in southwestern Piauí, Brazil, and identify favorable genotypes for hybridization. To do this, 13 soybean cultivars were grown in the region and assessed concerning vegetative and reproductive performance traits. Randomized block design was adopted, with four replications. Genetic divergence was determined by using the generalized Mahalanobis distance procedure, the Tocher's optimization method, and the unweighted pair-group method with arithmetic mean (UPGMA). Under the conditions analyzed, the Tocher's method and the UPGMA grouped the cultivars in a similar way. Genetic variability enabled the identification of dissimilar genotypes, and leaf area, thousand-seed weight, and pod length were the traits providing greater contribution. Hybridization between the cultivars Pampeana 10 RR x FT Campo Novo RR, BRS Sambaíba, M9350, M9144 RR, P99R03, or P99R09; between M8766 RR x Pampeana 20 RR, Pampeana 30 RR or P99R09; and between P99R09 x Pampeana 20 RR or Pampeana 30 RR showed to be favorable in order to obtain segregating populations with higher variability.

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Section: Resultsmentioning

confidence: 99%

Genetic divergence between soybean cultivars grown in the Cerrado in Southwestern Piau, Brazil

Sousa¹,

Chaves²,

Heberle³

et al. 2016

Afr. J. Agric. Res.

View full text Add to dashboard Cite

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“…is one of the main crops cultivated worldwide and is used in the preparation of various products, such as oil, and is a major ingredient in livestock feed due to the high level of protein (Oliveira et al, 2005). In 2009/2010, the area sown in Brazil was 23.6 million hectares with a production of 68.7 million tons and an average yield of approximately 2941 kg per hectare (CONAB, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…As examples of studies for this pathosystem are those to evaluate the potential of damage to yield (Yang et al, 1991b); mapping areas for risk of epidemics using climate models based on critical periods for infection supported by historical climatic data (Magarey et al, 2004); estimation of areas with high inoculum of the pathogen (Pivonia et al, 2004); estimation the time of disease occurrence ; estimation of areas with great availability of inoculum coming from different sources (Kim et al, 2005); and estimation of potential inoculum dispersed to long distances (Isard et al, 2005;Pan et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Utilization of the cropgro-soybean model to estimate yield loss caused by Asian rust in cultivars with different cycle

et al. 2012

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In recent years, crop models have increasingly been used to simulate agricultural features. The DSSAT (Decision Support System for Agrotechnology Transfer) is an important tool in modeling growth; however, one of its limitations is related to the unaccounted-for effect of diseases. Therefore, the goals of this study were to calibrate and validate the CSM CROPGRO-Soybean for the soybean cultivars M-SOY 6101 and MG/BR 46 (Conquista), analyze the performance and the effect of Asian soybean rust on these cultivars under the environmental conditions of Viçosa, Minas Gerais, Brazil. The experimental data for the evaluation, testing, and adjustment of the genetic coefficients for the cultivars, M-SOY 6101 and MG/BR 46 (Conquista), were obtained during the 2006/2007, 2007/2008 and 2009/2010 growing seasons. GLUE (Generalized Likelihood Uncertainty Estimation) was used for the estimation of the genetic coefficients, and pedotransfer functions have been utilized to estimate the physical characteristics of the soil. For all of the sowing dates, the early season cultivar, M-SOY 6101, exhibited a lower variance in yield, which represents more stability with regard to the interannual climate variability, i.e., the farmers who use this cultivar will have in 50% of the crop years analyzed, a higher yield than a late-season cultivar. The MG/BR 46 (Conquista) cultivar demonstrated a greater probability of obtaining higher yield in years with favorable weather conditions. However, in the presence of the Asian soybean rust, yield is heavily affected. The early cultivar, M-SOY 6101, showed a lower risk of being affected by the rust and consequently exhibited less yield loss considering the scenario D90 (condensation on the leaf surface occurs when the relative humidity is greater than or equal to 90%), for a sowing date of November 14.Key words: DSSAT, calibration, validation, modeling, rust epidemics.Utilização do modelo cropgro-soybean na estimativa da perda de produtividade causada pela ferrugem asiática utilizando cultivares de diferentes ciclos ResumoNos últimos anos, tem-se observado grande aumento na utilização de modelos de simulação na agricultura. O DSSAT (Sistema de Suporte à Decisão para Transferência de Agrotecnologia) é uma importante ferramenta na modelagem e simulação de crescimento de culturas, porém, uma das limitações é a não contabilização do efeito imposto por doenças. Assim, o trabalho teve como objetivos calibrar e validar o modelo CROPGRO-Soybean para as cultivares M-SOY 6101 e MG/BR 46 (Conquista), analisar a performance e o efeito da ferrugem asiática nessas cultivares nas condições edafoclimáticas de Viçosa, Minas Gerais, Brasil. Os dados experimentais para avaliação, teste e ajuste dos coeficientes genéticos para as duas cultivares foram obtidos durante as safras 2006/007, 2007/2008 e 2009/2010. O GLUE (do inglês, Generalized Likelihood Uncertainty Estimation) foi utilizado para a estimativa dos coeficientes genéticos e utilizaram-se as funções de pedotransferência para a estimativa dos parâmetro...

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Progênies superiores de soja resistentes ao tipo 3 do nematóide de cisto da soja

Cited by 2 publications

References 3 publications

Genetic divergence between soybean cultivars grown in the Cerrado in Southwestern Piau, Brazil

Genetic divergence between soybean cultivars grown in the Cerrado in Southwestern Piau, Brazil

Utilization of the cropgro-soybean model to estimate yield loss caused by Asian rust in cultivars with different cycle

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