Efetividade de genes de resistência de trigo a oídio

Costamilan, L. M.; Linhares, W. I.

doi:10.1590/s0100-41582002000600011

Cited by 6 publications

(4 citation statements)

References 5 publications

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“…Sampling locations for this study targeted the main wheat growing states in the south of Brazil, Parana and Rio Grande do Sul, where powdery mildew has been reported as a common disease (Costamilan, 2005). Surveys across those two states from 1995 to 2003 determined virulence levels to some older Pm genes, including a low frequency of virulence to Pm1a and Pm2, moderate levels to Pm4a and Pm6, and high frequencies to Pm3a, Pm4b, and Pm8 (Costamilan and Linhares, 2002;Costamilan, 2005). In general, wheat powdery mildew was not a major problem in Brazil until 2015 (P. Kuhnem, personal observation).…”

Section: Discussionmentioning

confidence: 99%

Virulence of Blumeria graminis f. sp. tritici in Brazil, South Africa, Turkey, Russia, and Australia

et al. 2022

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The globally distributed causal agent of powdery mildew on wheat, Blumeria graminis f. sp. tritici (Bgt), is one of the most rapidly adapting plant pathogens and requires monitoring for shifts in virulence to wheat resistance (Pm) genes. Virulence frequencies were assessed in a total of 346 Bgt isolates from several countries that had either lately recorded increasing powdery mildew epidemics (Brazil, South Africa, and Australia) or not recently been surveyed (Turkey and Russia). The results were compared to previously published surveys of United States and Egyptian Bgt (390 isolates). Many of the Pm genes that have potentially been employed longer (Pm1a–Pm17) were shown to have lost effectiveness, and the complexity of virulence to those genes was higher among Brazilian isolates than those from any other country. Some cases of high virulence frequency could be linked to specific Pm gene deployments, such as the widespread planting of cultivar Wyalkatchem (Pm1a) in Australia. Virulence was also assessed to a set of Pm genes recently introgressed from diploid and tetraploid wheat relatives into a hexaploid winter wheat background and not yet commercially deployed. The isolate collections from Fertile Crescent countries (Egypt and Turkey) stood out for their generally moderate frequencies of virulence to both the older and newer Pm genes, consistent with that region’s status as the center of origin for both host and pathogen. It appeared that the recently introgressed Pm genes could be the useful sources of resistance in wheat breeding for other surveyed regions.

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Section: Discussionmentioning

confidence: 99%

Virulence of Blumeria graminis f. sp. tritici in Brazil, South Africa, Turkey, Russia, and Australia

et al. 2022

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“…According to the data collected during the study, the blocks and treatments influenced the severity of powdery mildew (Figure 4), while the severity of Fusarium Head Blight (FHB) was not influenced by any of these factors and therefore, it is not shown (analyzed through nonparametric tests). On the other hand, the occurrence of powdery mildew does not require intense wetting (Costamilan;Scheeren, 2006). Therefore, it benefited from the climatic conditions and was recorded with high rates of severity during the experiment.…”

Section: Phytosanitary Parametersmentioning

confidence: 99%

“…Therefore, it benefited from the climatic conditions and was recorded with high rates of severity during the experiment. This disease is one of the most found in wheat crops in Brazil and can cause crop losses of up to 62% (Costamilan;Scheeren, 2006).…”

Section: Phytosanitary Parametersmentioning

confidence: 99%

Wheat elicitation performed in open field with the use of different elicitors

Ducatti¹,

Filho²,

Tironi³

et al. 2023

CLCS

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Being a staple food for human and animal nutrition, the cultivation of wheat needs the integration of new technologies, agronomic practices, and products to maximize profitability and achieve higher-quality kernel production. This study aimed to investigate the effects of two plant elicitors, Acibenzolar-S-Methyl and Carrageenan, in conditioning wheat plants to enhance the activity of both primary and specialized metabolisms. The objective was to attain qualitative and quantitative improvements in crop yield. The research was conducted during the 2021 harvest season in Chapecó-SC, employing a randomized complete block design with eight treatments and four replications. The TBio Noble cultivar was used for the experiment. The variables analyzed included physiological, morphological, biochemical, and phytosanitary aspects, along with yield components, qualitative parameters (including the presence of pathogens and mycotoxins in the kernels), and seed quality assessments. The application of the elicitors resulted in larger plant size, reduced the severity of powdery mildew, and seeds exhibited increased vigor. However, it is important to note that the experimental design, the meteorological conditions, and the number of treatments employed might have significantly influenced the obtained results. Based on the findings, the tested elicitors can be recommended as additives to fungicides to enhance disease control and contribute to greater crop gains.

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“…A temperatura afeta a respiração de manutenção, a transpiração, o repouso vegetativo, a taxa de germinação, entre outros (PEREIRA et al, 2002, MAVI et al, 2004MONTEIRO, 2009). Já a quantidade de vapor d'água na atmosfera é um agente regulador dos ciclos das pragas e doenças nas culturas, como o oídio, por exemplo, que é uma doença que pode surgir em climas frios e úmidos, ele reduz a fotoassimilação e a produção dos cultivares (COSTAMILAN, 2002;MOREIRA et al, 2015).…”

Section: Introductionunclassified

Análise descritiva de parâmetros meteorológicos como auxílio no cultivo de mamona em Diamantino/MT

Lima

Gama

Rosa

et al. 2017

RICA

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A mamona vem se destacando como alternativa de cultivo entressafras em várias partes do Brasil devido, principalmente, a sua utilização como matéria prima de biodiesel. Mais fortemente produzida no Nordeste Brasileiro, essa cultura possui características as quais a fazem adaptar em diferentes lugares do país tupiniquim. Cidade em que se destaca fortemente nos cenários agrícolas estadual e nacional, Diamantino, presente na região da Chapada dos Parecis em Mato Grosso, é uma das principais cidades produtoras de grãos de soja no Brasil. Além da soja, a cidade também desponta como grande produtora de algodão e milho. Juntamente com o crescimento da produção agrícola, de uma maneira geral, ampliam-se os estudos de monitoramento e de descrição dos parâmetros meteorológicos importantes para o desenvolvimento dessas culturas, que servem também como auxílios para introdução de culturas não oriundas da região. Ante o exposto, este trabalho teve como objetivo avaliar, em relação à recomendação da literatura, às condições dos parâmetros meteorológicos para práticas de cultivares de mamoneira na cidade de Diamantino/MT. Para isso, realizou-se análise descritiva dos dados de temperatura do ar, precipitação e umidade relativa do ar referentes ao período de 2006 a 2015, obtidos juntos ao INMET. Obteve-se o período entre abril e setembro como o mais adequado para o cultivo de mamona na cidade, sendo os cultivares com ciclos mais curtos os mais apropriados. Os cultivares com longos ciclos, de até 250 dias, podem sofrer influência negativa dos excessos de chuva e umidade relativa.

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Efetividade de genes de resistência de trigo a oídio

Cited by 6 publications

References 5 publications

Virulence of Blumeria graminis f. sp. tritici in Brazil, South Africa, Turkey, Russia, and Australia

Virulence of Blumeria graminis f. sp. tritici in Brazil, South Africa, Turkey, Russia, and Australia

Wheat elicitation performed in open field with the use of different elicitors

Análise descritiva de parâmetros meteorológicos como auxílio no cultivo de mamona em Diamantino/MT

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