title: Geography of Genetic Structure in Barley Wild Relative Hordeum vulgare subsp. spontaneum in Jordan.
abstract: Informed collecting, conservation, monitoring and utilization of genetic diversity requires knowledge of the distribution and structure of the variation occurring in a species. Hordeum vulgare subsp. spontaneum (K. Koch) Thell., a primary wild relative of barley, is an important source of genetic diversity for barley improvement and co-occurs with the domesticate within the center of origin. We studied the current distribution of genetic diversity and population structure in H. vulgare subsp. spontaneum in Jordan and investigated whether it is correlated with either spatial or climatic variation inferred from publically available climate layers commonly used in conservation and ecogeographical studies. The genetic structure of 32 populations collected in 2012 was analyzed with 37 SSRs. Three distinct genetic clusters were identified. Populations were characterized by admixture and high allelic richness, and genetic diversity was concentrated in the northern part of the study area. Genetic structure, spatial location and climate were not correlated. This may point out a limitation in using large scale climatic data layers to predict genetic diversity, especially as it is applied to regional genetic resources collections in H. vulgare subsp. spontaneum.
authors: Bioversity International, Rome, Italy.
authors: Imke
authors: http://orcid.org/0000-0003-2703-9805
authors: I
authors: Thormann
authors: National Center for Genetic Resources Preservation, United States Department of Agriculture-Agricultural Research Service, Fort Collins, Colorado, United States of America.
authors: Patrick
authors: P
authors: Reeves
authors: National Center for Genetic Resources Preservation, United States Department of Agriculture-Agricultural Research Service, Fort Collins, Colorado, United States of America.
authors: Ann
authors: A
authors: Reilley
authors: Bioversity International, Rome, Italy.
authors: Johannes M M
authors: JM
authors: Engels
authors: Genebank Department, Leibniz Institute of Plant Genetics and Crop Plant Research, Gatersleben, Germany.
authors: Ulrike
authors: U
authors: Lohwasser
authors: Genebank Department, Leibniz Institute of Plant Genetics and Crop Plant Research, Gatersleben, Germany.
authors: Andreas
authors: A
authors: Börner
authors: Plant Breeding, Institute for Agricultural and Nutritional Science, Martin-Luther-University Halle-Wittenberg, Halle, Germany.
authors: Klaus
authors: K
authors: Pillen
authors: National Center for Genetic Resources Preservation, United States Department of Agriculture-Agricultural Research Service, Fort Collins, Colorado, United States of America.
authors: Christopher M
authors: CM
authors: Richards
mesh_terms: D018744:DNA, Plant / Q000235:genetics; D017343:Genes, Plant / Q000235:genetics*; D005819:Genetic Markers / Q000235:genetics*; D014644:Genetic Variation; D005838:Genotype; D005843:Geography; D001467:Hordeum / Q000235:genetics*; D007597:Jordan; D018895:Microsatellite Repeats / Q000235:genetics*; D005810:Multigene Family
chemical_list: D018744:DNA, Plant; D005819:Genetic Markers