Severidade de ferrugem polissora em cultivares de milho e seu efeito na produtividade

Dudienas, Christina; Fantin, Gisèle Maria; Duarte, Aildson Pereira; Ticelli, Marcelo; Bárbaro, Ivana Marino; Freitas, Rogério Soares de; Leão, Paulo C. L.; Filho, Gerson Cazentini; Bolonhezi, Denizart; Pantano, Angélica Prela

doi:10.1590/s0100-54052013000100003

Cited by 13 publications

(10 citation statements)

References 2 publications

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“…This relationship shows that the higher the intensity and severity of E. turcicum, the lower the grain yield of the crop. Negative correlations between grain yield and leaf diseases in maize were reported by Santos et al (2002) and Dudienas et al (2013).…”

Section: Correlation Between Traits With the Genotype Value Of The Hybridsmentioning

confidence: 93%

Genetic Merit of Popcorn Lines and Hybrids for Multiple Foliar Diseases and Agronomic Properties

Santos¹,

Souza²,

Vivas³

et al. 2020

FPBJ

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Popcorn lines with genetic resistance to foliar diseases allow the production of higher yields at lower costs. Thus, the development of resistant genotypes becomes essential, while the selection efficiency of parents and hybrids depends on the existence of genetic variability and knowledge about the genetic trait control. The objective of this study was to determine the genetic merit of the hybrid lines and genotypes, as well as the reciprocal effect; to draw conclusions on the genetic control of the traits of disease incidence and severity associated with resistance to Exserohilum turcicum, Bipolaris maydis, Puccinia polysora and of the agronomic traits grain yield and popping expansion; and to assess the effects of the trait interrelations on parent and hybrid selection. Fifty-six hybrid combinations (F1 and reciprocal crosses) were evaluated in two growing seasons. A randomized block design with four replications was used. Regardless of the growing season, the non-additive genetic component had the greatest influence on the studied traits, whereas no reciprocal effect was observed. The performance of lines L61, L70 and L76 was good in both growing seasons by increasing the level of multiple disease resistance associated with high gains in GY and PE. The hybrids L61 x L76; L61 x L77; L76 x P1 were the most promising of the tested crosses for cultivation in both seasons, targeting a decrease in the levels of several diseases and higher grain yields and popping expansion.

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Section: Correlation Between Traits With the Genotype Value Of The Hybridsmentioning

confidence: 93%

Genetic Merit of Popcorn Lines and Hybrids for Multiple Foliar Diseases and Agronomic Properties

Santos¹,

Souza²,

Vivas³

et al. 2020

FPBJ

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“…We performed five evaluations over five weeks. Five common maize diseases, including common rust ( Puccinia sorghi ) (Dudienas et al., 2013), grey leaf spot ( Cercospora Zeae ‐maydis ) (Lazaroto et al., 2012), Diplodia leaf streak ( Stenocarpella sp.) (Bradley et al., 2010), anthracnose ( Colletotrichum graminicola ) (Trojan & Pria, 2018) and maize white spot ( Pantoea ananatis ) (Malagi et al., 2011) were quantified.…”

Section: Methodsmentioning

confidence: 99%

Integrating a chemical fungicide and Bacillus subtilis BIOUFLA2 ensures leaf protection and reduces ear rot (Fusarium verticillioides) and fumonisin content in maize

Guimarães

Zanotto²,

Perrony

et al. 2020

Journal of Phytopathology

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Fungicides in maize production under tropical conditions reduce losses from foliar diseases, but only a few reduce ear rot incidence or mycotoxin contamination in kernels. Biocontrol agents (BCAs) may reduce postharvest losses but their efficacy has not been demonstrated in field conditions. Here, we evaluated the use of bacterial isolates in tandem with fungicides on Fusarium verticillioides incidence and fumonisin content. After an early screening, Bacillus subtilis and Streptomyces araujoniae isolates were used in field trials. Maize plants were sprayed twice: at the end of the vegetative stage (V9) and at the beginning of the reproductive stage (R1). Sprays were made by applying water, B. subtilis strain BIOUFLA2, S. araujoniae strain ASBV‐1T, or fungicide (cyproconazole + azoxystrobin) in different combinations, totalling nine treatments. Ten days later, all maize ears were inoculated with F. verticillioides. Plants were assessed for foliar diseases, grain yield, F. verticillioides incidence and fumonisin content in kernels. The treatment with two fungicide sprays reduced most of the foliar diseases but not F. verticillioides incidence in kernels. Twice‐sprayed B. subtilis and S. araujoniae reduced F. verticillioides, but did not protect leaves against other pathogens. All treatments encompassing a fungicide followed by one of the BCAs reduced F. verticillioides incidence compared to control. Twice‐sprayed fungicide increased fumonisin by 50% compared to water control, while fungicide followed by B. subtilis decreased the fumonisin content by 40%. Replacing the second chemical spray with S. araujoniae did not reduce the fumonisin content but provided a higher yield than a twice‐sprayed fungicide. Exclusive use of chemical fungicides may not ensure higher grain quality and yield, but the integration with B. subtilis BIOUFLA2 can accomplish both.

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“…Among maize leaf diseases, white leaf spot (Pantoea ananatis), northern leaf blight (Exserohilum turcicum), gray leaf spot (Cercospora zeae-maydis), and southern rust (Puccinia polysora) are recognized as important both for the potential reduction of grain yield and for the generalized occurrence in the producing regions of Brazil and the world (SILVA et al, 2015). In addition, other problems are reported, such as the inefficiency of fungicides to control the white leaf spot (JULIATTI et al, 2004), the fact that the occurrence of the northern leaf blight predisposes the plant to pathogens that cause stem rot (COTA et al, 2010), stem deterioration and plant lodging caused by the gray leaf spot under high severities (CASELA;FERREIRA, 2003), and the high variability of the southern rust pathogen, which allows a fast adaptation to the resistant materials available in the market (DUDIENAS et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Identification and characterization of maize lines resistant to leaf diseases

Kaefer

Schuelter

Schuster³

et al. 2019

SCA

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Among the maize leaf diseases, white leaf spot, northern leaf blight, gray leaf spot, and southern rust are recognized not only by the potential for grain yield reduction but also by the widespread occurrence in the producing regions of Brazil and the world. The aim of this study was to characterize common maize lines for resistance to white leaf spot, northern leaf blight, gray leaf spot, and southern rust and suggest crosses based on the genetic diversity detected in SNP markers. The experiment was conducted in a randomized block design with three replications in order to characterize 72 maize lines. Genotypic values were predicted using the REML/BLUP procedure. These 72 lines were genotyped with SNP markers using the 650K platform (Affymetrix®) for the assessment of the genetic diversity. Genetic diversity was quantified using the Tocher and UPGMA methods. The existence of genetic variability for disease resistance was detected among maize lines, which made possible to classify them into three large groups (I, II, and III). The maize lines CD 49 and CD50 showed a good performance and can be considered sources of resistance to diseases. Therefore, their use as gene donors in maize breeding programs is recommended. Considering the information of genetic distance together with high heritability for leaf diseases, backcrossing of parent genotypes with different resistance levels, such as those of the lines CD49 x CD69 and CD50 x CD16, may result in new gene combinations, as they are divergent and meet good performances.

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Severidade de ferrugem polissora em cultivares de milho e seu efeito na produtividade

Cited by 13 publications

References 2 publications

Genetic Merit of Popcorn Lines and Hybrids for Multiple Foliar Diseases and Agronomic Properties

Genetic Merit of Popcorn Lines and Hybrids for Multiple Foliar Diseases and Agronomic Properties

Integrating a chemical fungicide and Bacillus subtilis BIOUFLA2 ensures leaf protection and reduces ear rot (Fusarium verticillioides) and fumonisin content in maize

Identification and characterization of maize lines resistant to leaf diseases

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