ArticlePloS one2014
The USDA barley core collection: genetic diversity, population structure, and potential for genome-wide association studies.
Article in PloS one, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 104 papers.
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104 citing papers in PubMed.
- Review
- Genome-Wide Characterization of Genetic Diversity and Population Structure in a Kazakhstani Two-Row Spring Barley Breeding Panel.International journal of molecular sciences · 2026Article
- Identification and genomic location of resistance to bacterial leaf streak of barley.The plant genome · 2026Article
- Global perspective on the genetic architecture of susceptibility to spot form net blotch in barley.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2026Article
- Spatial coordination between leaf gradient and temperature response in barley.The Plant journal : for cell and molecular biology · 2026Article
- Article
- Cutting through the clones: genomic strategies for core collection development in moso bamboo.BMC genomics · 2026Article
- Advancements in Molecular Breeding Techniques for Soybeans.Plants (Basel, Switzerland) · 2025Review
- Rainfall patterns during barley seed development underlie genomic variation for germination after flooding.Plant physiology · 2025Article
- On the origin of the late-flowering ppd-H1 allele in barley.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2025Article
- Genome-wide association mapping of loci conferring all-stage and high-temperature adult-plant resistance to stripe rust in a global spring barley collection.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2025Article
- Combating Root-Knot Nematodes (Plants (Basel, Switzerland) · 2025Review
- Environmental genomic selection to leverage polygenic local adaptation in barley landraces.Communications biology · 2025Article
- Genotyping Genebank Collections: Strategic Approaches and Considerations for Optimal Collection Management.Plants (Basel, Switzerland) · 2025Review
- CountrywideFrontiers in plant science · 2025Article
- Article
- Association mapping unravels the genetic basis for drought related traits in different developmental stages of barley.Scientific reports · 2024Article
- Genome wide association study of seedling and adult plant leaf rust resistance in two subsets of barley genetic resources.Scientific reports · 2024Article
- Article
- Trait-customized sampling of core collections from a winter wheat genebank collection supports association studies.Frontiers in plant science · 2024Article
44 more citing papers are in PubMed but not listed here.
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11 authors.
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Abstract
New sources of genetic diversity must be incorporated into plant breeding programs if they are to continue increasing grain yield and quality, and tolerance to abiotic and biotic stresses. Germplasm collections provide a source of genetic and phenotypic diversity, but characterization of these resources is required to increase their utility for breeding programs. We used a barley SNP iSelect platform with 7,842 SNPs to genotype 2,417 barley accessions sampled from the USDA National Small Grains Collection of 33,176 accessions. Most of the accessions in this core collection are categorized as landraces or cultivars/breeding lines and were obtained from more than 100 countries. Both STRUCTURE and principal component analysis identified five major subpopulations within the core collection, mainly differentiated by geographical origin and spike row number (an inflorescence architecture trait). Different patterns of linkage disequilibrium (LD) were found across the barley genome and many regions of high LD contained traits involved in domestication and breeding selection. The genotype data were used to define 'mini-core' sets of accessions capturing the majority of the allelic diversity present in the core collection. These 'mini-core' sets can be used for evaluating traits that are difficult or expensive to score. Genome-wide association studies (GWAS) of 'hull cover', 'spike row number', and 'heading date' demonstrate the utility of the core collection for locating genetic factors determining important phenotypes. The GWAS results were referenced to a new barley consensus map containing 5,665 SNPs. Our results demonstrate that GWAS and high-density SNP genotyping are effective tools for plant breeders interested in accessing genetic diversity in large germplasm collections.
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