A5071054474- Rice Cultivation and Yield Improvement
- Genetic Mapping and Diversity in Plants and Animals
- GABA and Rice Research
- Plant Virus Research Studies
- Plant Disease Resistance and Genetics
- Plant responses to water stress
- Plant Pathogenic Bacteria Studies
- Plant-Microbe Interactions and Immunity
- Genetically Modified Organisms Research
- Genetic and Environmental Crop Studies
- Agriculture and Rural Development Research
- Genetics and Plant Breeding
- Agricultural pest management studies
- Wheat and Barley Genetics and Pathology
- Genomics and Phylogenetic Studies
- Genetic diversity and population structure
- Plant Genetic and Mutation Studies
- Biofuel production and bioconversion
- Agricultural Productivity and Crop Improvement
- Insect Resistance and Genetics
- International Maritime Law Issues
- Plant Parasitism and Resistance
- Agricultural Systems and Practices
- Chromosomal and Genetic Variations
- Banana Cultivation and Research
Africa Rice Center
2016-2025
The University of Queensland
2018
Agriculture and Food
2018
GTx (United States)
2009
Institut de Recherche pour le Développement
1999-2001
Centre National de la Recherche Scientifique
2001
The cultivation of rice in Africa dates back more than 3,000 years. Interestingly, African is not the same origin as Asian (Oryza sativa L.) but rather an entirely different species (i.e., Oryza glaberrima Steud.). Here we present a high-quality assembly and annotation O. genome detailed analyses its evolutionary history domestication selection. Population genomics 20 94 barthii accessions support hypothesis that was domesticated single region along Niger river opposed to noncentric events...
Abstract Crop landraces have unique local agroecological and societal functions offer important genetic resources for plant breeding. Recognition of the value landrace diversity concern about its erosion on farms led to sustained efforts establish ex situ collections worldwide. The degree which these succeeded in conserving has not been comprehensively assessed. Here we modelled potential distributions eco-geographically distinguishable groups 25 cereal, pulse starchy root/tuber/fruit crops...
Summary African cultivated rice ( Oryza glaberrima Steud.) was domesticated from its wild progenitor species barthii ) about 3000 years ago. Seed shattering is one of the main constraints on grain production in rice, which causes severe losses during harvest. By contrast, Asian sativa displays greater resistance to seed shattering, allowing higher production. A better understanding regulation would help improve harvesting efficiency rice. Here, we report map‐based cloning and...
Three cultivars of Oryza sativa (IR64, Azucena, and Gigante) four O. glaberrima (Tog5681, Tog5673, CG14, SG329) were evaluated for their resistance to two isolates rice yellow mottle virus (RYMV) by enzyme-linked immunosorbent assay (ELISA) symptomatology. Cultivars Tog5681 Gigante highly resistant, no symptoms observed when either isolate was inoculated at 10 or 20 days postgermination assayed ELISA 7, 14, 22, 35, 50, 64 postinoculation. Azucena showed a partial resistance, whereas the...
The sequence variation present in accessions conserved gene banks can best be used plant improvement when it is properly characterized and published. Using low cost high density single nucleotide polymorphism (SNP) assays, the genetic diversity, population structure, relatedness between pairs of quickly assessed. This information relevant for different purposes, including creating core mini-core sets that represent maximum possible contained whole collection. Here, we studied structure 2,179...
Amylose content (AC) is a key quality trait in rice. A cross between Oryza glaberrima (African rice) and sativa (Asian segregating for AC was analysed by sequencing bulks of individuals with high low AC. SNP associated the granule bound starch synthase (GBSS1) locus on chromosome 6 were polymorphic bulks. In particular, G/A that would result an Asp to Asn mutation identified. This amino acid substitution may be responsible differences GBSS activity as it adjacent disulphide linkage conserved...
Seed dormancy is a significant factor limiting the conservation, evaluation, distribution and utilisation of African cultivated rice, Oryza glaberrima . In this study, 20 accessions from AfricaRice genebank were grown at Mbé station in Côte d’Ivoire, harvested manually, dried 15% RH 15°C, stored -20°C for one month before use. Seeds underwent dry heat treatment 50 or 60°C 2, 4, 7, 14, 21 28 days, treated with: 0.5, 1, 1.5 2 M KCl; 0.022, 0.112,...
Using interspecific crosses involving Oryza glaberrima Steud. as donor and O. sativa L. recurrent parents, rice breeders at the Africa Rice Center developed several 'New for (NERICA)' improved varieties. A smaller number of intraspecific varieties have also been released 'Advanced (ARICA)'. Here, we studied genetic variation, relatedness, population structure 331 widely used genotypes in using DArTseq-based single nucleotide polymorphisms (SNP). sample 1 aus, 11 ARICAs, 85 NERICAs, 62...
The international collections of plant genetic resources for food and agriculture (PGRFA) hosted by 11 CGIAR Centers are important components the United Nations Food Agriculture Organization's global system conservation use PGRFA. They also play an supportive role in realizing Target 2.5 Sustainable Development Goals. This paper analyzes genebanks' trends acquiring distributing PGRFA over last 35 years, with a particular focus on decade. highlights number factors influencing Centers'...
Marker assisted backcrossing (MAB) is one of the most anticipated and frequently cited benefits molecular markers as indirect selection tools in breeding programs. However, routine implementations MAB ongoing plant programs are still scarce. Currently single gene perhaps powerful approach that uses DNA effectively. Improvement quantitative traits loci (QTLs) through resulted to variable results ranging from limited success and/or even a failure few highly successful stories. A major...
Xanthomonas oryzae pv. (Xoo) is the causal agent of Bacterial Leaf Blight (BB), an emerging disease in rice West-Africa which can induce up to 50 % yield losses. So far, no specific resistance gene or QTL African Xoo were mapped. The objectives this study identify and map novels QTLs strains. reference recombinant inbred lines (RIL) mapping population derived from cross between IR64 Azucena was used investigate resistance. Resistance Philippine strains representing different races assessed...
Species misclassification (misidentification) and handling errors have been frequently reported in various plant species conserved at diverse gene banks, which could restrict use of germplasm for correct purpose. The objectives the present study were to (i) determine extent genotyping error (reproducibility) on DArTseq-based single-nucleotide polymorphisms (SNPs); (ii) proportion misclassified accessions across 3134 samples representing three African rice complex (Oryza glaberrima, O....
Oryza glaberrima is one of the two cultivated species rice, and harbors various interesting agronomic traits, especially in biotic abiotic resistance, compared with its Asian cousin O. sativa. A previous reference genome was published but newer studies highlighted some missing parts. Moreover, global diversity known nowadays to be represented by more than single individual. For that purpose, we sequenced, assembled annotated de novo three different cultivars from glaberrima. After validating...
Genebanks underpin global food security, conserving and distributing agrobiodiversity for use in research breeding. The CGIAR collections include >700,000 seed accessions, held trust as public goods. However, the role of genebanks contributing to security can only be realized if are effectively managed. Examination historical viability monitoring data from seven confirmed that high was maintained many decades various crops forage species. departures optimum management procedures were...