A5040764430- Rice Cultivation and Yield Improvement
- Genetic Mapping and Diversity in Plants and Animals
- GABA and Rice Research
- Genetics and Plant Breeding
- Nematode management and characterization studies
- Plant responses to water stress
- Cassava research and cyanide
- Genetic diversity and population structure
- Plant Micronutrient Interactions and Effects
- Agriculture and Rural Development Research
- Genetic and Environmental Crop Studies
- Plant Genetic and Mutation Studies
- Plant tissue culture and regeneration
- Plant Reproductive Biology
- Plant Pathogens and Resistance
- Genomics and Phylogenetic Studies
- Agricultural Innovations and Practices
- Plant Molecular Biology Research
- Plant Disease Resistance and Genetics
- Plant Virus Research Studies
- Agronomic Practices and Intercropping Systems
- Plant Pathogenic Bacteria Studies
- Banana Cultivation and Research
International Atomic Energy Agency
2020-2024
Africa Rice Center
2014-2022
Rice University
2011-2014
International Rice Research Institute
2011
Salinity is one of the most severe and widespread abiotic stresses that affect rice production. The identification major-effect quantitative trait loci (QTLs) for traits related to salinity tolerance understanding QTL × environment interactions (QEIs) can help in more precise faster development salinity-tolerant varieties through marker-assisted breeding. Recombinant inbred lines (RILs) derived from IR29/Hasawi (a novel source salinity) were screened IRRI phytotron Philippines (E1) two other...
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....
Salinity is one of the most serious factors limiting productivity rice crops, with adverse effects on germination, plant vigor and crop yield. A population 300 F 5:6 recombinant inbred lines (RILs), which was derived from a cross between IR29 (indica sensitive to salinity) Hasawi (Saudi cultivar showing salt tolerance), evaluated at young seedling stage under hydroponic conditions an EC 12 dsm -1 . Such RIL when fixed can be repeatedly used for investigating QTLs various phenotypes different...
Abstract Salt stress is a menace to rice production and threat food security worldwide. We evaluated 308 F 4 families from Sahel 317/Madina Koyo for tolerance salt at the early seedling stage. To better understand genomic regions controlling in population, we genotyped progenies two parents using single nucleotide polymorphism (SNP) markers regressed genotypic data on their phenotype detect QTLs. An average reduction of 63.4% was observed all fitness-related traits among families. A total 46...
The genus Oryza has two cultivated species, Asian rice (Oryza sativa L.) and African glaberrima Steud.) 22 wild species. O. is low yielding but useful genes for resistance to biotic abiotic stresses. Introgression lines derived from backcrossing of x glaberrima, using as recurrent parent, were evaluated tolerance root-knot nematode (Meloidogyne graminicola). Testing in sick plots infested with nematodes showed reduction plant height, shoot root biomass leaf area index compared the control....
Relative water content, potential and transpiration of Africa rice (Oryza glaberrima) were investigated in a controlled condition under phytotron. Two Oryza sativa cultivars, IR55423-01 (a drought tolerant genotype) IR64 (drought sensitive 8 O. glaberrima accessions grown droughted watered conditions. The fraction transpirable soil (FTSW) was used as an indicator availability. Transpiration determined by changes daily pot weights the ratio to plants expressed normalized (NTR). FTSW greater...
In the Sahel zone of West Africa that extends from Senegal to Chad, temperatures can vary less than 15 °C 25 November February. These low affect growth, development and yield rice plants, therefore constitute a major constraint production in Sahel. order identify varieties tolerant cold stress at different developmental stages, diverse set 224 germplasm was evaluated for yield-related traits Ndiaye, Senegal, using three sowing dates. The first date (October 2010), chosen so as expose plants...
Interspecific hybrids (F1's) between Asian rice (Oryza sativa 2n=24 AA) and African (Oryza glaberrima 2n=24 are almost completely sterile. This hybrid sterility barrier is mainly caused by an arrest of pollen development at the microspore stage. Intersubspecific F1 hybrid cryptic chromosomal aberrations allelic interaction between indica and japonica. To identify O. glaberrima specific loci, 67 subspecies-specific (SS) sequenced-tagged site (STS) marker were used to evaluate 30 O....
Rice (Oryza sativa L) is one of the most important staple food worldwide with a global production estimated at around 800 million metric tons for paddy rice in 2021. However, this hampered by several factors, such as land salinity. In study, 230 F2:3 lines Sahel 328/NERICA-L-9 mapping populations were evaluated their tolerance to salinity young seedling stage an electrical conductivity (EC) equivalent 12 dSm−1. All parameters investigated negatively affected under saline conditions compared...
Cassava ( Manihot esculenta Crantz ) production and productivity in Africa is affected by two viral diseases; cassava mosaic disease (CMD) brown streak (CBSD). Induced mutagenesis of totipotent/embryogenic tissues or vitro plant material can lead to the generation CMD and/or CBSD tolerant mutants. To massively produce non-chimeric plants timely with less labor, totipotent cells are a pre-requisite. This study aimed determine effect gamma radiation on proliferation growth friable embryogenic...
Cassava Brown Streak Disease (CBSD) and Mosaic (CMD) have been major limiting biotic factors to the productivity of cassava farming in Kenya. Development resistant varieties is most effective way. The study was determine response elite lines CBSD CMD under field conditions on different agro-ecological zones Screening done hot-spot where five together with their parents were evaluated Randomized Complete Block Design three replications at University Eldoret (UoE), Solai Marakwet sites...
Anther indehiscence in certain wide crosses combines male sterility with stigma exertion, a phenomenon that is desirable for hybrid rice seed production. This study sought to identify chromosomal region(s) combine anther exerted stigmas. A mapping population consisting of 189 BC
Unavailability of germplasm with Cassava Brown Streak Disease (CBSD) and Mosaic (CMD) tolerance genes remains the main bottleneck towards management two diseases in tropic sub-tropic regions Africa. We assessed pathogenicity viruses established presence linked to CBSD CMD among some elite cassava lines using field techniques PCR methods. The screen-house experiment was arranged split plot completely randomized block design replicated thrice. Severity data done on a scale 1 - 5 at an interval...