CARACTERÍSTICAS CULTURAIS E PATOLÓGICAS DE Bipolaris maydis  EM DIFERENTES MEIOS DE CULTURA

Santos, Juliana Saltires; Júnior, Antônio Teixeira do Amaral; Vivas, Marcelo; Vivas, Janieli Maganha Silva; Kurosawa, Railan Nascimento; Silveira, Silvaldo Felipe da

doi:10.18512/1980-6477/rbms.v15n3p461-469

Cited by 3 publications

(1 citation statement)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Images captured under a microscope allowed us to detect the pseudo‐septate structure of asexual spores produced by the phytopathogenic fungus Bipolaris maydis . Previous studies found a similar coloration and pseudo‐septate conidia (Pal et al, 2015; Santos et al, 2016). Based on colour in the colony, in their study, Ferreira et al (2022) found the predominance of the colony texture being cotton wool, with grey‐ dark greenish in the front and black colour at the colony back, during B. maydis identification.…”

Section: Resultssupporting

confidence: 73%

Rapid screening for resistance of maize inbred and hybrid lines against southern corn leaf blight

Shukuru,

Archana,

Kangela

2023

Journal of Phytopathology

View full text Add to dashboard Cite

Bipolaris is one of the most important phytopathogenic fungal genera to cause disease in cereal crops. Southern corn leaf blight (SCLB) is a pandemic and widespread disease; it's found everywhere corn is grown, causing a noticeable reduction in crop yield. Most cultivated varieties of maize do not resist SCLB disease where it is reported. Nevertheless, previous researchers have reported some resistant varieties of maize. In this study, we tested inbred and hybrid lines collected from ICAR‐IIMR based in Ludhiana against the disease. The field experiment was setup using a Randomized Block Design with three replications in natural conditions. Here we evaluated lines by quantifying disease pressure, yield, and their attributes. Moreover, model‐based clustering allowed the identification of five groups. For the SCLB disease confirmation, infected maize leaves were collected and used for pathogen isolation, and a pure culture was maintained. Both disease assessment and data analysis focused more specifically on characters that showed significant differences between means, especially leaf area, percentage of leaf infection, disease incidence, disease severity, disease index by plot basis, number of grain rows formed per ear, weight of maize kernels per ear, each corn ear weight, shelling percentage, and grain yield. The two best clusters identified, namely Group 1 and Group 2, together comprise 11002, 11009, 11026, 11030, 11069, 11149, 11153, 11185, 11328, 11333, 11337, 11347, 11370, 11385, 11074, 11351, 11356, 11357, 11608, and Karav‐8523 lines. As per disease reaction, CM‐500 is individually one of the best lines in terms of SCLB resistance. Specific symptoms were clearly found on leaves, and pseudo‐septate conidia were observed under the microscope. Thus, several lines exhibited highly resistant reactions against SCLB, especially 11002, 11009, 11026, 11069, 11074, 11337, 11347, 11385, and CM‐500, and can still be recommended for farmers and in breeding programmes, for future usefulness as industries are complaining of maize shortages, and they present a great commercial potential.

show abstract

Section: Resultssupporting

confidence: 73%

Rapid screening for resistance of maize inbred and hybrid lines against southern corn leaf blight

Shukuru,

Archana,

Kangela

2023

Journal of Phytopathology

View full text Add to dashboard Cite

show abstract

Characterization of the Bipolaris maydis: symptoms and pathogenicity in popcorn genotypes (Zea mays L.)

et al. 2024

View full text Add to dashboard Cite

Southern corn leaf blight (SCLB) is one of the most important corn leaf diseases. Appropriate management strategies and the use of resistant cultivars allow disease control. Therefore, knowing the aspects related to the pathogen and the response of hosts makes it possible to design efficient strategies for selecting genotypes resistant to this disease. In this sense, the objective was to carry out the Bipolaris maydis isolate characterization, evaluating the pathogenicity in different popcorn lines and the symptoms generated in the host after inoculation. The isolate characterization consisted of the macromorphological evaluation of the colonies and the micromorphological evaluation of the conidia in the PDA medium. An experiment was carried out in a greenhouse to evaluate the pathogenicity of the isolate, using 20 inbred lines of popcorn in a randomized block design with four replicates. Inoculation was carried out by spraying leaves, with a suspension containing 1.0 x 104 conidia.ml-1 of the CF/UENF 501 isolate of B. maydis. An incidence assessment and three assessments of disease symptom severity were performed, with seven days intervals between evaluations. The morphological characterization data of the isolate were analyzed using descriptive statistics, and for disease severity, the linear regression model was applied the first-degree model. The variance analysis was performed for the linear and angular coefficients obtained for each treatment. When a difference was found, the Scott-Knott clustering algorithm at 5% significance was applied. The isolate had gray-green colonies, a cottony appearance, and an irregular shape. The lines L353, L354, and L624 show more resistance at the beginning and throughout the evaluations. The high virulence of the CF/UENF 501 isolate made it possible to differentiate the lines in terms of disease intensity and the pattern of symptoms presented.

show abstract

Resistance to multiple leaf diseases in popcorn lines with potential for baby corn production

et al. 2022

Self Cite

View full text Add to dashboard Cite

The cultivation of special corns, such as baby corn, has had a positive influence on the economy of the country. Despite its importance, there is still a need for studies aimed at increasing production and planting areas of the crop. Phytosanitary studies are of particular interest, as the cultivation of such crops is susceptible to a series of pathogens, such as Bipolaris maydis, Exserohilum turcicum, and Puccinia polysora. The use of resistant cultivars is the most effective way to prevent the occurrence of these diseases. Thus, the present study aimed to identify popcorn lines that have the potential for baby corn production and are resistant to the main leaf diseases that affect the crop. The experiment was conducted in randomized blocks with four replications of 30 lines in each area, during two planting seasons. The area was located at the Federal Institute of Espírito Santo (IFES) Campus of Alegre, situated in Rive district, Espírito Santo State, Brazil. Using the obtained data, the area under the disease progress curve was obtained. Subsequently, analysis of the joint variance of the data was conducted, and when a significant effect was found, a grouping of means test was conducted. The Mahalanobis distance for each pair of lines was also calculated, and the genetic distance matrix was used to construct a dendrogram using the UPGMA method. Considering the averages obtained for the three diseases (Southern corn leaf blight, Northern corn leaf blight, and Southern rust), lines L61, L63, L65, L683, L684, L685, L691, L694, and L695 were identified as possible donors of resistance alleles for multiple diseases. Multivariate analysis efficiently grouped the lines L61, L63, L684, L685, and L691, which are described as most resistant in the univariate analysis.

show abstract

CARACTERÍSTICAS CULTURAIS E PATOLÓGICAS DE Bipolaris maydis EM DIFERENTES MEIOS DE CULTURA

Cited by 3 publications

References 6 publications

Rapid screening for resistance of maize inbred and hybrid lines against southern corn leaf blight

Rapid screening for resistance of maize inbred and hybrid lines against southern corn leaf blight

Characterization of the Bipolaris maydis: symptoms and pathogenicity in popcorn genotypes (Zea mays L.)

Resistance to multiple leaf diseases in popcorn lines with potential for baby corn production

Contact Info

Product

Resources

About