A5013302221- Plant pathogens and resistance mechanisms
- Plant Pathogenic Bacteria Studies
- Agricultural pest management studies
- Agronomic Practices and Intercropping Systems
- Plant-Microbe Interactions and Immunity
- Plant Pathogens and Fungal Diseases
- Genetics and Plant Breeding
- Legume Nitrogen Fixing Symbiosis
- Agriculture and Rural Development Research
- Soybean genetics and cultivation
- Plant Disease Resistance and Genetics
- Genetic and Environmental Crop Studies
- Spacecraft Design and Technology
- Nematode management and characterization studies
- Light effects on plants
- Photosynthetic Processes and Mechanisms
- Gender, Labor, and Family Dynamics
- Insect Pest Control Strategies
- Wheat and Barley Genetics and Pathology
- Spacecraft and Cryogenic Technologies
- Celiac Disease Research and Management
- Natural Language Processing Techniques
- Sunflower and Safflower Cultivation
- Plant nutrient uptake and metabolism
- Plant Virus Research Studies
Agricultural Research Council of South Africa
2015-2022
Consiglio per la ricerca in agricoltura e l’analisi dell’economia agraria
2018
ABSTRACT Dry beans ( Phaseolus vulgaris L.) of the Andean gene pool, including red mottled, kidney, cranberry, and yellow seed types are important in Africa Americas. dry bean breeding gains have lagged behind those Mesoamerican beans. This difference may result from a narrower genetic base pool reduced efforts. The objective this research was to establish, genotype, phenotype panel germplasm be used for breeding. An diversity (ADP) assembled, consisting 396 accessions cultivars, lines,...
Seedling root phenotypes may have important impacts on fitness and are more easily measured than mature phenotypes. We phenotyped the roots of 577 genotypes common bean (Phaseolus vulgaris), representing bulk genetic diversity for recent cultivars landraces in this species. Root architectural seedlings germinated nine days were compared to field as well seed yield across 51 environments with an array abiotic stresses including drought, nutrient deficiency, heat, non-stress conditions....
Common bean (Phaseolus vulgaris L.) is an important staple crop for smallholder farmers, particularly in Eastern and Southern Africa. To support common breeding seed dissemination, a high throughput SNP genotyping platform with 1500 established assays has been developed at service provider which allows breeders without their own infrastructure to outsource such service. A set of 708 genotypes mainly composed germplasm from African CIAT program were assembled genotyped over 800 SNPs....
Pseudomonas syringae pv. phaseolicola (Psph) Race 6 is a globally prevalent and broadly virulent bacterial pathogen with devastating impact causing halo blight of common bean (Phaseolus vulgaris L.). Common lines PI 150414 CAL 143 are known sources resistance against this pathogen. We constructed high-resolution linkage maps for three recombinant inbred populations to map Psph derived from the two lines. This was complemented genome-wide association study (GWAS) in an Andean Diversity Panel...
Abstract Dry bean ( Phaseolus vulgaris L.) is a nutrient‐dense food rich in proteins and minerals. Although dietary staple numerous regions, including Eastern Southern Africa, greater utilization limited by its long cooking time as compared with other foods. A fivefold genetic variability for has been identified P. , to effectively incorporate the trait into breeding programs, knowledge of how genotypes behave across diverse environments essential. Fourteen selected from market classes...
ABSTRACT Halo bacterial blight caused by Pseudomonas syringae pv. phaseolicola ( Psp ) is a serious seed‐borne disease of common bean Phaseolus vulgaris L.). The can be controlled major resistance (R) genes effective against specific races the pathogen. Our objective was to characterize R gene(s) conferring Races 1, 5, 7, and 9 in great northern dry germplasm release BelNeb‐RR‐1. A recombinant inbred population consisting 76 F –derived lines (RILs) from cross BelNeb‐RR‐1/A55 inoculated with...
ABSTRACT Halo blight [caused by Pseudomonas syringae pv. phaseolicola (Burkh.) Young et al. ( Psp )] is a serious seed‐borne bacterial disease of common bean Phaseolus vulgaris L.). A few resistance (R) genes and quantitative trait loci provide control to one or more races the pathogen. To better understand monogenic improve breeding efficiency, we sought tag map gene Pse‐1 ) in host differential cultivar UI‐3 (previously named ‘Red Mexican UI‐3’) that provides 1, 5, 7, 9 Cosegregation for...
Abstract Disease surveys were conducted during 1995/96 in seed production fields, and 1996/97 1997/98 commercial dry bean‐producing areas to determine incidence, severity spread of bacterial diseases South Africa. A total 682 fields at 31 localities 81 24 surveyed. Common blight occurred 83 85% areas, respectively. Halo was restricted cooler only 10% 37% Bacterial brown spot the most widespread disease occurring 93% 100% fields. Although incidences high, generally low. The distribution both...
ABSTRACT Pseudomonas syringae pv. phaseolicola (Burkholder) Young et al. ( Psp ) causes halo blight, which is a serious bacterial disease of common bean Phaseolus vulgaris L.). Several resistance (R) genes have been discovered in host differential cultivar ZAA 12. Our objectives were to further characterize and enable marker‐assisted selection (MAS) the Pse‐2 gene 12 purported broad effect against multiple races. A recombinant inbred population, × ‘Canadian Wonder’, was challenged by blight...
Bacterial brown spot (BBS) of common bean (Phaseolus vulgaris) is a seed-borne bacterial disease caused by Pseudomonas syringae pv. (Pss). Dry an important field crop in South Africa and all commercially available African dry cultivars are susceptible to BBS. The aim this study was determine the current distribution severity BBS production areas Africa. We surveyed 31 locations five provinces. Disease evaluated on selected plots 0–9 scale four different farming systems: commercial...
Isolates of the halo blight pathogen Pseudomonas syringae pv. phaseolicola were collected in bean-producing areas South Africa from 1991 to 1996. Of 1,128 isolates collected, 967 identified as P. phaseolicola. The majority these obtained a wide range Phaseolus vulgaris cultivars, and rest coccineus lunatus. Two hundred fifty-five isolates, representative all localities cultivars sampled, categorized into different races according their reaction on set differential cultivars. Seven (1, 2, 4,...
Common bacterial blight (CBB) disease limits dry bean ( Phaseolus vulgaris L.) production worldwide. Resistance quantitative trait loci (QTL) from tepary acutifolius A. Gray) have been used to develop lines with high levels of CBB resistance. This study examines the effects that two QTL BC420 (B) on chromosome Pv06 and SU91 (S) Pv08 agronomic (seed yield seed weight) canning quality traits (water uptake, percentage washed drained weight [PWDWT], texture, visual appearance). Sixteen small...
Bacterial brown spot (BBS) disease caused by Pseudomonas syringae pv. is an important of dry bean (Phaseolus vulgaris L.), with grain yield losses 55% reported in South Africa. This study aimed to identify BBS disease-resistant genotypes from 415 Andean Diversity Panel (ADP) lines and 5 check cultivars under field conditions across three sites Africa: Warden Middelburg natural infestation Potchefstroom artificial inoculation. Plants at were inoculated P. using isolates 21, 28, 36 days after...
Abstract The low genetic diversity in Andean common bean ( Phaseolus vulgaris ) presents opportunities to improve stress tolerance and increase productivity. Thus, this study aimed develop breeding populations evaluate them suboptimal environments. Improvement Cooperative (PIC) were developed by crossing 53 five Middle American parents using bulk breeding. Selection evaluation Puerto Rico, South Africa, Tanzania, Washington State resulted 384 superior PIC lines used subsequent studies. the...