A5000523870- Wheat and Barley Genetics and Pathology
- Plant Disease Resistance and Genetics
- Genetic Mapping and Diversity in Plants and Animals
- Genetics and Plant Breeding
- Rice Cultivation and Yield Improvement
- Yeasts and Rust Fungi Studies
- Plant Pathogens and Resistance
- Plant Pathogens and Fungal Diseases
- Bioenergy crop production and management
- Plant pathogens and resistance mechanisms
- Mycotoxins in Agriculture and Food
- GABA and Rice Research
- Crop Yield and Soil Fertility
- Plant Pathogenic Bacteria Studies
- Agriculture, Soil, Plant Science
- Plant Virus Research Studies
- Genetic and phenotypic traits in livestock
- Plant-Microbe Interactions and Immunity
- Silicon Effects in Agriculture
- Chromosomal and Genetic Variations
- Food composition and properties
- Berry genetics and cultivation research
- Fungal and yeast genetics research
- Plant Disease Management Techniques
- Seed Germination and Physiology
Agricultural Research Service
2011-2021
United States Department of Agriculture
2010-2021
Kenya Agricultural and Livestock Research Organization
2016
Cereal Disease Laboratory
2016
Edward T. Schafer Agricultural Research Center
2016
North Dakota State University
2011-2016
Oregon State University
2016
University of California, Davis
2011-2016
International Maize and Wheat Improvement Center
2016
Plant (United States)
2011
Abstract Moroberekan, a japonica rice cultivar with durable resistance to blast disease in Asia, was crossed the highly susceptible indica cultivar, CO39, and 281 F7 recombinant inbred (RI) lines were produced by single seed descent. The population evaluated for greenhouse field, analyzed 127 restriction fragment length polymorphism (RFLP) markers. Two dominant loci associated qualitative five isolates of fungus tentatively named Pi-5(t) Pi-7(t). They mapped on chromosomes 4 11,...
New sources of genetic diversity must be incorporated into plant breeding programs if they are to continue increasing grain yield and quality, tolerance abiotic biotic stresses. Germplasm collections provide a source phenotypic diversity, but characterization these resources is required increase their utility for programs. We used barley SNP iSelect platform with 7,842 SNPs genotype 2,417 accessions sampled from the USDA National Small Grains Collection 33,176 accessions. Most in this core...
Rice (Oryza sativa L.) is grown on more than 147 million hectares worldwide, primarily in countries where human population densities are extremely high. The crop well adapted to flooded soils and high temperatures, conditions common vast areas of Asia under which no other cereal can thrive (58). Current global rice production 520 tons, or approximately 57 kg milled per capita, sufficient provide 20% the total caloric requirement In terms producing calories for consumption, probably world's...
equivalent for the purposes of this study. Bonman, J. M., Vergel de Dios, T. I., and Khin, M. 1986. Physiologic specialization All cultures were maintained initially Pyricularia oryzae in Philippines. Plant Disease 70:767-769. prune agar slants. For long-term The rice blast pathogen, oryzae, was collected from various regions Philippines storage, sorghum grains used as a tested on widely grown Philippine cultivars International, Japanese, Korean substrate. steeped, differential cultivar...
Accelerated wheat development and deployment of high-yielding, climate resilient, disease resistant cultivars can contribute to enhanced food security sustainable intensification. To facilitate gene discovery, we assembled an association mapping panel 528 spring landraces diverse geographic origin for a genome-wide study (GWAS). All accessions were genotyped using Illumina Infinium 9K single nucleotide polymorphism (SNP) chip 4781 polymorphic SNPs used analysis. identify loci underlying...
Genomic discovery in oat and its application to improvement have been hindered by a lack of genetic markers common different maps, the difficulty conducting whole-genome analysis using high-throughput markers. This study was intended develop, characterize, apply large set based on Diversity Array Technology (DArT).Approximately 19,000 genomic clones were isolated from complexity-reduced representations pooled DNA samples 60 varieties global origin. These screened three arrays, with more than...
Hexaploid oat ( Avena sativa L., 2 n = 6 x 42) is a member of the Poaceae family and has large genome (∼12.5 Gb) containing 21 chromosome pairs from three ancestral genomes. Physical rearrangements among parental genomes have hindered development linkage maps in this species. The objective work was to develop single high‐density consensus map that representative majority commonly grown varieties. Data cDNA‐derived single‐nucleotide polymorphism (SNP) array genotyping‐by‐sequencing (GBS) were...
Abstract Background Genetic markers are pivotal to modern genomics research; however, discovery and genotyping of molecular in oat has been hindered by the size complexity genome, a scarcity sequence data. The purpose this study was generate expressed tag (EST) information, develop bioinformatics pipeline for SNP discovery, establish method rapid, cost-effective, straightforward complex polyploid genomes such as oat. Results Based on cDNA libraries four cultivated genotypes, approximately...
Leaf rust, caused by Puccinia triticina (Pt), and stripe P. striiformis f. sp. tritici (Pst), are destructive foliar diseases of wheat worldwide. Breeding for disease resistance is the preferred strategy managing both diseases. The continued emergence new races Pt Pst requires a constant search sources resistance. Here we report genome-wide association analysis 567 winter (Triticum aestivum) landrace accessions using Infinium iSelect 9K SNP array to identify loci associated with seedling...
A physically anchored consensus map is foundational to modern genomics research; however, construction of such a in oat (Avena sativa L., 2n = 6x 42) has been hindered by the size and complexity genome, scarcity robust molecular markers, lack aneuploid stocks. Resources developed this study include modified SNP discovery method for complex genomes, diverse set novel chromosome-deficient anchoring strategy. These resources were applied build first complete, physically-anchored hexaploid oat....
Bacterial leaf streak (BLS), caused by Xanthomonas translucens pv. undulosa (Smith et al.) Bragard al., and spot blotch (SB), Cochliobolus sativus (S. Ito & Kurib.) Drechs. ex Dastur, are two emerging diseases of wheat (Triticum aestivum L.). To achieve sustainable disease management strategies reduce yield losses, identifying new genes that confer quantitative resistance would benefit breeding efforts. The main objective this study was to use association mapping (AM) with 832 polymorphic...
Six hundred thirty five oat ( Avena sativa L.) lines and 4561 single‐nucleotide polymorphism (SNP) loci were used to evaluate population structure, linkage disequilibrium (LD), genotype–phenotype association with heading date. The first principal components (PCs) accounted for 25.3% of genetic variation. Neither the eigenvalues 25 PCs nor cross‐validation errors from K = 1 20 model‐based analyses suggested a structured population. However, PC 2 supported clustering on spring vs. southern...
Selecting high-yielding wheat cultivars with more productive tillers per unit area (PTN) combined fertile spikelets spike (fSNS) is difficult. QTL mapping of these traits may aid understanding this bottleneck and accelerate precision breeding for high yield via marker-assisted selection. PTN fSNS were assessed in four to five trials from 2015 2017 a doubled haploid population derived two "UI Platinum" "SY Capstone." Two (QPTN.uia-4A QPTN.uia-6A) (QfSNS.uia-4A, QfSNS.uia-5A, QfSNS.uia-6A,...
The classification of neck blast resistance intermediate and susceptible lines varied between trials, mostly due to differences in flowering date. mean leaf values from the miniplot trials were positively correlated with lowland trials. Some lines, however, exceptions this general relationship. Lines particular interest breeders should be screened for resistance; improved methods are required, particularly testing
Stagonospora nodorum blotch (SNB), caused by Phaeosphaeria nodorum, is a destructive disease of wheat (Triticum aestivum) found throughout the United States. Host resistance only economically feasible option for managing disease; however, few SNB-resistant cultivars are known to exist. In this study, we report findings from an association mapping (AM) P. in 567 spring landraces diverse geographic origin. The accessions were evaluated seedling greenhouse. Phenotypic data and 625 polymorphic...
Bacterial leaf streak (BLS), caused by Xanthomonas translucens pv. undulosa, has become more prevalent recently in North Dakota and neighboring states. From five locations Dakota, 226 strains of X. undulosa were collected evaluated for pathogenicity then selected inoculated on a set 12 wheat cultivars other cereal hosts. The genetic diversity all was determined using repetitive sequence-based polymerase chain reaction (rep-PCR) insertion (IS)-PCR. pathogenic barley but symptom severity...
Leaf rust of wheat ( L.) is a major disease that causes significant yield losses worldwide. The short-lived nature leaf resistance () genes necessitates continuous search for novel sources resistance. We performed genome-wide association study (GWAS) on panel 1596 accessions. was evaluated reaction by testing with bulk Eriks. isolates collected from multiple fields Oklahoma in 2013 and two predominant races the 2015. genotyped set 5011 single-nucleotide polymorphism (SNP) markers. A total 14...
ABSTRACT Accessions of common wheat ( Triticum aestivum L. subsp. ) from the USDA–ARS National Small Grains Collection (NSGC) are a resource for scientists worldwide. The genetic diversity core subset, representing approximately 10% collection's 42,138 T. accessions, was examined using 390 arrays technology (DArT) markers, 4941 single nucleotide polymorphisms (SNPs), and descriptor data. marker profiles revealed duplicates, which were excluded to form an informative (iCore) 3230 accessions....
Oat crown rust, caused by f. sp. , is a major constraint to oat ( L.) production in many parts of the world. In this first comprehensive multienvironment genome-wide association map we used 2972 single-nucleotide polymorphisms (SNPs) genotyped on 631 lines for mapping quantitative trait loci (QTL). Seedling reaction rust these was assessed as infection type (IT) with each 10 isolates. Adult plant field total location-years percentage severity (SV) and (IR) 0-to-1 scale. Overall, 29 SNPs 12...