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dc.contributorBaum, Michaelen_US
dc.contributorGuo, Peiguoen_US
dc.contributorGrando, Stefaniaen_US
dc.contributorCeccarelli, Salvatoreen_US
dc.contributorGraner, Andreasen_US
dc.creatorVarshney, Rajeeven_US
dc.identifier.citationRajeev Varshney, Michael Baum, Peiguo Guo, Stefania Grando, Salvatore Ceccarelli, Andreas Graner. (7/1/2010). Features of SNP and SSR diversity in a set of ICARDA barley germplasm collection. Molecular Breeding, 26 (2), pp. 229-242.en_US
dc.description.abstractDetection and utilization of genetic variation available in the germplasm collection for crop improvement have been the prime activities of breeders. Here a set of ICARDA barley germplasm collection comprising of 185 cultivated (Hordeum vulgare L.) and 38 wild (H. spontaneum L.) genotypes originated from 30 countries of four continents was genotyped with 68 single nucleotide polymorphism (SNP) and 45 microsatellite or simple sequence repeat (SSR) markers derived from genes (expressed sequence tags, ESTs). As two SNP markers provided 2 and 3 datapoints, a total of 71 SNPs were surveyed that yielded a total of 143 alleles. The number of SSR alleles per locus ranged from 3 to 22 with an average of 7.9 per marker. Average PIC (polymorphism information content) value for SSR and SNP markers were recorded as 0.63 and 0.38, respectively. Heterogeneity was recorded at both SNP and SSR loci in an average of 5.72 and 12.42% accessions, respectively. Genetic similarity matrices for SSR and SNP allelic data were highly correlated (r = 0.75, P < 0.005) and therefore allelic data for both markers were combined and analyzed for understanding the genetic relationships among the germplasm surveyed. Majority of clusters/subclusters were found to contain genotypes from the same geographic origins. While comparing the genetic diversity, the accessions coming from Middle East Asia and North East Asia showed more diversity as compared to that of other geographic regions. Majority of countries representing Africa, Middle East Asia, North East Asia and Arabian Peninsula included the genotypes that contained rare alleles. As expected, spontaneum accessions, as compared to vulgare accessions, showed a higher number of total alleles, higher number of alleles per locus, higher effective number of alleles and higher allelic richness and a higher number of rare alleles were observed. In summary, the examined ICARDA germplasm set showed ample natural genetic variation that can be harnessed for future breeding of barley as climate change and sustainability have become important throughout all growing areas of the world, drought/heat tolerance being the most important ones.en_US
dc.sourceMolecular Breeding;26,(2010) Pagination 229-242en_US
dc.subjectgenetic diversityen_US
dc.titleFeatures of SNP and SSR diversity in a set of ICARDA barley germplasm collectionen_US
dc.typeJournal Articleen_US
cg.creator.idBaum, Michael: 0000-0002-8248-6088en_US
cg.subject.agrovocmolecular markersen_US
cg.contributor.centerInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.centerInternational Crops Research Institute for the Semi-Arid Tropics - ICRISATen_US
cg.contributor.centerLeibniz Institute of Plant Genetics and Crop Plant Research - ipk-gaterslebenen_US
cg.contributor.centerGuangzhou University - GZHUen_US
cg.contributor.funderBundesministerium fur Wirtschaftliche Zusammenarbeit und Entwicklung - DMZen_US
cg.contributor.projectCommunication and Documentation Information Services (CODIS)en_US
cg.contributor.project-lead-instituteInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.isijournalISI Journalen_US
dc.identifier.statusTimeless limited accessen_US
cg.journalMolecular Breedingen_US

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