A5001204134- Nematode management and characterization studies
- Legume Nitrogen Fixing Symbiosis
- Agricultural pest management studies
- Banana Cultivation and Research
- Cassava research and cyanide
- Soybean genetics and cultivation
- Genetic and Environmental Crop Studies
- Plant Pathogens and Fungal Diseases
- Plant-Microbe Interactions and Immunity
- Yeasts and Rust Fungi Studies
- Probiotics and Fermented Foods
- GABA and Rice Research
- Plant Disease Management Techniques
- Entomopathogenic Microorganisms in Pest Control
- Fungal Plant Pathogen Control
- Agricultural and Food Sciences
- Plant Disease Resistance and Genetics
Universidade Federal de Santa Maria
2020-2024
Universidade de Brasília
2009-2020
University of California, Riverside
2015-2019
Brazilian Agricultural Research Corporation
2006-2007
Summary Cowpea ( Vigna unguiculata [L.] Walp.) is a major crop for worldwide food and nutritional security, especially in sub‐Saharan Africa, that resilient to hot drought‐prone environments. An assembly of the single‐haplotype inbred genome cowpea IT97K‐499‐35 was developed by exploiting synergies between single‐molecule real‐time sequencing, optical genetic mapping, an reconciliation algorithm. A total 519 Mb included assembled sequences. Nearly half sequence composed repetitive elements,...
Summary Multi‐parent advanced generation inter‐cross ( MAGIC ) populations are an emerging type of resource for dissecting the genetic structure traits and improving breeding populations. We developed a population cowpea Vigna unguiculata L. Walp.) from eight founder parents. These founders were genetically diverse carried many abiotic biotic stress resistance, seed quality agronomic relevant to improvement in United States sub‐Saharan Africa, where is vitally important human diet local...
Genome resolution of a major QTL associated with the Rk locus in cowpea for resistance to root-knot nematodes has significance plant breeding programs and R gene characterization. Cowpea (Vigna unguiculata L. Walp.) is susceptible host (Meloidogyne spp.) (RKN), plant-parasitic pests global agriculture. To date, relied on phenotypic selection which requires time-consuming expensive controlled infection assays. facilitate marker-based selection, we aimed identify map quantitative trait loci...
Cowpea is one of the most important food and forage legumes in drier regions tropics subtropics. However, cowpea yield worldwide markedly below known potential due to abiotic biotic stresses, including parasitism by root-knot nematodes (Meloidogyne spp., RKN). Two resistance genes with dominant effect, Rk Rk2, have been reported provide against RKN cowpea. Despite their description use breeding for particularly genetic mapping locus, exact conferring remain unknown. In present work, QTL...
Background and Aims Endoparasitic root-knot nematodes (RKNs) (Meloidogyne spp.) cause considerable losses in banana (Musa spp.), with Meloidogyne incognita a predominant species Cavendish sub-group bananas. This study investigates the root transcriptome Musa acuminata genotypes 4297-06 (AA) Grande Naine (CAV; AAA) during early compatible interactions M. incognita. Methods Roots were analysed by brightfield light microscopy over 35 d period to examine nematode penetration morphological cell...
The root-knot nematode (RKN) species Meloidogyne incognita and M. javanica cause substantial root system damage suppress yield of susceptible cowpea cultivars. narrow-based genetic resistance conferred by the Rk gene, present in some commercial cultivars, is not effective against Rk-virulent populations found several production areas. dynamics virulence within RKN require a broadening base elite As part this goal, F1 F2 from cross CB46-Null (susceptible) x FN-2-9-04 (resistant) were...
Cowpea (Vigna unguiculata L. Walp) is an affordable source of protein and strategic legume crop for food security in Africa other developing regions; however, damage from infection by root-knot nematodes (RKN) suppresses cowpea yield. The deployment through breeding resistance gene Rk cultivars has provided protection to growers worldwide many years. However, occurrence more aggressive nematode isolates threatens the effectiveness this monogenic resistance. A germplasm collection 48...
Abstract The utility of combining simple sequence repeat ( SSR ) and single nucleotide polymorphism SNP marker genotyping was determined for genetically mapping a novel aphid Aphis craccivora resistance locus in cowpea breeding line SARC 1‐57‐2 introgressing the into elite cultivars by marker‐assisted backcrossing MABC ). tagged with codominant CP 171F/172R recombination fraction 5.91% an F 2 population from ‘Apagbaala’ x 1‐57‐2. A ‐genotyped biparental recombinant inbred genotyped...
Pseudocercospora musae, causal agent of Sigatoka leaf spot, or yellow disease, is considered a major pathogen banana (Musa spp.). Widely disseminated in Brazil, this study explored the genetic diversity field populations from production areas Distrito Federal and States Bahia, Minas Gerais Rio Grande do Norte. Resistance to demethylation inhibitor (DMI) fungicides was also examined. For 162 isolates 10 growing regions, analysis mating type idiomorph frequency conducted, together with...
The objective of this work was to investigate possible modes action the yeast Cryptococcus magnus in controlling anthracnose (Colletotrichum gloeosporioides) on post harvested papaya fruits. Scanning electron microscopy used analyze effect inoculations done after harvest. Results showed that C. is able colonize wound surfaces much faster than pathogen, outcompeting later for space and probably nutrients. In addition, produces a flocculent matrix, which affects hyphae integrity. competition...
Summary Meloidogyne enterolobii is an emerging pathogen in Brazil, considered highly destructive to tomato. Due the lack of cultivars resistant this nematode, objective work was evaluate effect Trichoderma spp. strains on promotion tomato growth and biological control M. populations. The use eight from CENARGEN collection three formulated products at a concentration 1.43 × 10 6 conidia ml −1 significantly increased fresh weight roots compared plants inoculated only with nematodes. These...
Abstract Development and analysis of Multiparent Advanced Generation Inter-Cross (MAGIC) populations have been conducted with several crop plants to harness the potential for dissecting genetic structure traits improving breeding populations. We developed a first MAGIC population cowpea ( Vigna unguiculata L. Walp.) from eight founder parents which are genetically diverse carry many abiotic biotic stress resistance, seed quality agronomic relevant improvement in sub-Saharan Africa (SSA)...
ABSTRACT Nematodes are important pathogens in banana plants, and the lack of resistant genotypes is biggest challenge breeding programs. Little known on behavior triploids tetraploids developed by Embrapa regarding parasitism plant-parasitic nematodes field conditions. Mandioca e Fruticultura experimental areas, naturally infested five Brazilian states (Embrapa Acre - Acre, Semiárido Pernambuco, Cerrados Distrito Federal, Palmital São Paulo Epagri Santa Catarina) were evaluated for...
The use of in vitro mass multiplication nematodes under axenic conditions allows intensification studies on taxonomy, biology, epidemiology and control these pathogens. In the present study, two methods were compared for species plant-parasitic nematodes, Radopholus similis Pratylenchus brachyurus 20, 40 60 day-periods. Both techniques involved carrot cylinders placed jars with lids, water-agar bottom flasks (WA+) or without (WA-). WA- treated a 1% solution ampicillin whilst WA+ axenization...
The root lesion nematode, Pratylenchus brachyurus (Godfrey) Filipjev & Schuurmans Stekhoven, has been caused significant losses in soybean crops Brazil. addition of organic fertilizers may suppress the population these plant-parasitic nematodes. aim this work was to evaluate action cattle manure, vermicompost, compost, and slaughterhouse swine compost on reduction P. development plants (cv. NR 5909). experiment conducted for 90 days after inoculation (DAI) pots, greenhouse. At DAI,...
Rio Grande do Sul State produces 70% of pecans in Brazil. There is a high density phytopathogenic nematodes orchards. This study characterises the populations plant-parasitic and investigates their association with soil properties pecan-cultivated areas. The genera Mesocriconema, Criconemoides, Discocriconemella, Xiphinema, Tylenchus, Pratylenchus, Helicotylenchus, Aphelenchoides were all identified. Discocriconemella Xiphinema positively associated organic matter, cation exchange capacity,...
Abstract Soybean is frequently affected by pathogenic fungi, which are usually managed chemicals. Foliar sprays with biological agents have been introduced as new allies to reduce plant diseases. This study verified foliar of Bacillus subtilis‐ based product applied for three consecutive cropping seasons associated or not chemical fungicides control Asian rust ( Phakopsora pachyrhizi ) and the effect B. subtilis ‐produced metabolites against fungi on soybean growth. Field treatments were...
Abstract The burrowing nematode Radopholus similis is among the most damaging pathogens. Resistant plants are one of promising approaches for control, and knowledge resistance aggressiveness components essential to understand genetics developing new cultivars. Therefore, this study aimed assess degree eight banana accessions populations R. verify differences in reproduction capacity between horizontal/vertical aggressiveness/ virulence Musa spp. pathosystem. 4249-05, 4279-06, Yangambi Km5,...