A5074034930- Banana Cultivation and Research
- Cassava research and cyanide
- Plant Pathogens and Fungal Diseases
- Nematode management and characterization studies
- Plant Disease Management Techniques
- Plant Pathogenic Bacteria Studies
- Agricultural and Food Sciences
- Plant-Microbe Interactions and Immunity
- Plant Virus Research Studies
- Pineapple and bromelain studies
- Plant tissue culture and regeneration
- Genetic and Environmental Crop Studies
- Phytoplasmas and Hemiptera pathogens
- Growth and nutrition in plants
- Plant Pathogens and Resistance
- Date Palm Research Studies
- Plant and Fungal Interactions Research
- Plant Micronutrient Interactions and Effects
- Plant Disease Resistance and Genetics
- Mosquito-borne diseases and control
- Plant nutrient uptake and metabolism
- Environmental and biological studies
- Fungal Plant Pathogen Control
- Plant pathogens and resistance mechanisms
- Plant responses to water stress
Brazilian Agricultural Research Corporation
2015-2024
Universidade Federal do Recôncavo da Bahia
2017-2023
Weatherford College
2023
Agricultural Research Corporation
2019
Southwest Bahia State University
2007
Over the last few years, considerable effort has been spent by Embrapa in construction of a plant disease database representative enough for development effective methods automatic detection and recognition. In October 2016, this database, called PDDB, had 2326 images 171 diseases other disorders affecting 21 species. PDDB size, although considerable, is not to allow use powerful techniques such as deep learning. order increase its each image was subdivided according certain criteria,...
Cassava witches' broom disease (CWBD) has emerged as a significant threat to cassava production in the Oiapoque region of Amap&aacute, Brazil. Diseased plants exhibit stunted growth, vascular necrosis, abnormal shoot proliferation, and distinctive broom-like appearance. This study aimed characterize identify its causal agent(s). The assessment by high-throughput sequencing total nucleic acids (DNA RNA) from affected tissues revealed Rhizoctonia theobromae (syn. Ceratobasidium )...
This study aimed to characterize the resistance of 31 passion fruit (Passiflora sp.) genotypes Fusarium oxysporum f. sp. passiflorae (FOP). About 20 seedlings each genotype were inoculated by immersing roots in a suspension 10(6) macroconidia mL-1 for five minutes and then transplanting them into pots containing mixture soil sterile substrate. They evaluated daily 120 days occurrence wilt symptoms death. These data used calculate area under disease progress curve, survival analysis grouping....
Despite the occurrence of several diseases cassava, cassava black root rot (CBR) represents one main limiting factor for crop rentability in world. However, etiology CBR is complex and it needs to be revised based on current molecular analysis. On this work, morphological studies allowed identification three species Botryosphaeriaceae causing disease states Maranhão Paraíba, Brazil, namely: Lasiodiplodia euphorbicola, pseudotheobromae Neoscytalidium hyalinum. This first report these fungal...
Coffee leaf rust is the most limiting disease for coffee cultivation in Brazil. Despite its importance, relatively little known about genetic diversity of Hemileia vastatrix , causal agent. In this work, DNA from 112 monopustule isolates different geographic locations and genotypes were analysed by amplified fragment length polymorphisms ( AFLP ). The objectives to assess influence host origin on population differentiation H . fungal showed a low level genotypic diversity. Gene h ) was 0·027...
Abstract Fusarium oxysporum f. sp. cubense (Foc) causes Panama disease or wilt of bananas. The association between soil-inhabiting fungi and nematodes can increase the severity symptoms suppress resistance plants to diseases. In this study, interaction Foc race 1 Radopholus similis , a burrowing nematode that parasitizes banana plants, was analyzed using one moderately susceptible cultivar seven resistant cultivars banana. Two isolates differed in virulence were tested. analyses stained...
Fusarium wilt caused by oxysporum f. sp. cubense (Foc) is one of the most destructive diseases in banana farming worldwide. Knowledge factors genetic diversity and virulence pathogen contributes to development resistant cultivars management strategies based on exclusion. In this study, phenotypic traits such as aggressiveness a sample 52 Foc isolates, were analyzed their relationship presence putative effectors gene SIX (Secreted Xylem) pathogenicity homologues, verified. According...
Fusarium oxysporum f. sp. passiflorae W.L. Gordon (FOP) is one of the most important fungal pathogens passion fruits. Understanding molecular variation isolates from different areas utmost importance. Molecular fingerprinting on 14 FOP were conducted using AFLP markers (Amplified Fragment Length Polymorphism), and their genetic variability estimated. Twenty-five primer combinations selected for amplification cubense W.C. Snyder & H.N. Hansen (FOC), resulting in 99% polymorphic fragments,...
Panama disease, caused by Fusarium oxysporum f. sp. cubense (Foc), is ranked among the most destructive diseases of banana. The use resistant varieties desirable and effective control measure. Information on pathogen population structure essential, as durability resistance cultivar deployment are strongly linked to this structure. In study, 214 Foc isolates from different banana producing states in three regions Brazil (northeastern, southeastern southern) were analysed. Initially, nine...
Cassava root rot disease is caused by a complex of soil-borne pathogens and has high economic impacts because it directly affects the tuberous roots, which are main commercial product. This study aimed to evaluate cassava genotypes for resistance in field with previous history incidence. It also identify possible genomic regions associated based on genome-wide association studies. A total 148 from Embrapa Mandioca Fruticultura were evaluated over two years, including improved materials...
Although root rot is one of the major diseases affecting Brazilian cassava (Manihot esculenta Crantz.), little known about diversity pathogens. In this study, diseased plants exhibiting symptoms were collected from cassava-producing regions in five states: Bahia, Sergipe, Paraíba, Maranhão, Tocantins, and Paraná. Seventy isolates obtained assigned to species complexes based on rDNA's ITS (internal transcribed spacer ribosomal DNA) region (ITS1, ITS2 5.8S). A total seven was found belonging...
SUMMARY Cassava root rot (CRR) disease associated with a complex of soil pathogens has caused great yield losses in the crop. The objective current work was to obtain insights about genetic architecture CRR resistance by Fusarium (dry – DRR), Phytophthora (soft SRR) and Botryosphaeriaceae (black BRR) species, using genome-wide association studies (GWAS). Phenotyping data 263 accessions (artificial inoculation) 14 094 single-nucleotide polymorphisms (SNP) (missing <0·10 minor allele...
The objective of this work was to identify sources resistance dry root rot induced by Fusarium sp. in cassava accessions. A macroconidial suspension (20 µL) 11 isolates inoculated roots, from 353 acessions plus seven commercial varieties. Ten days after inoculation, the total area colonized pathogen on pulp evaluated digital image analysis. Cluster analysis revealed presence five groups regarding resistance. lesion areas ranged 18.28 1,096.07 mm² for accessions BGM 1518 and 556,...
ABSTRACT Fusarium wilt (syn= Panama disease), caused by oxysporum f. sp. cubense (FOC), is one of the most destructive diseases banana, being genetic resistance main management strategy for this disease. Since pathogen constantly evolving to supplant resistance, new sources must be investigated improvement programs aiming developing varieties. The objective present study was identify from different accessions maintained in banana active germplasm bank (BAGB) at Embrapa Mandioca e...
Cassava (Manihot esculenta Crantz) is an important food security crop in many parts of the developing world. The crop’s high yield potential and multitude uses–both for nutrition processing–render cassava a promising driver development rural value chains. It traditionally propagated from stem cuttings up to 30 cm length, giving multiplication rate as low 1:10. Propagating very inefficient, which leads challenges production distribution quality planting material improved cultivars, greatly...
Cassava (Manihot esculenta Crantz) is a major staple crop in developing countries and large source of raw material for industrial purposes as flour, starch, ethanol. In July 2012, 24 cassava genotypes (corresponding to 1.85% the accessions) with typical symptoms frogskin disease (CFSD) were observed one maintenance areas Brazilian Germplasm (located at Embrapa & Fruits, Cruz das Almas, Bahia State, Brazil). All diseased plants asymptomatic on aboveground parts (leaves stem). However,...