The USDA barley core collection: genetic diversity, population structure, and potential for genome-wide association studies.

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, ma

SUBMITTER: Munoz-Amatriain M 

PROVIDER: S-EPMC3986206 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature