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dc.creatorWang,Xiao-Qiang
dc.creatorKwon,Soon-Wook
dc.creatorPark,Yong-Jin
dc.date2013-09-01
dc.date.accessioned2019-05-03T12:45:08Z
dc.date.available2019-05-03T12:45:08Z
dc.identifierhttps://scielo.conicyt.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000500011
dc.identifier.urihttp://revistaschilenas.uchile.cl/handle/2250/85371
dc.descriptionBackground: In order to evaluate the variation among different rice types, the genetic diversity in a rice collection composed by 59 breeding lines, 23 landraces, 18 weedy rice lines, and 35 introduced lines that collected from countries worldwide was analyzed using 134 simple sequence repeat markers. Results: In total, 1264 alleles were identified (average, 9.43 per locus). Rare alleles made up a large portion (58.4%) of the detected alleles, and 29 unique alleles associated with rice accessions were also discovered. A model-based structural analysis revealed the presence of three subpopulations. The genetic relationships revealed by the neighbour-joining tree method were fairly consistent with the structure-based membership assignments for most of the accessions. A total of 105 accessions (79.5%) showed a clear relationship to each cluster, while the remaining 27 accessions (20.5%) were categorized as admixtures. Linkage disequilibrium (LD) patterns and distributions are of fundamental importance for genome-wide association mapping. The mean r² value for all intrachromosomal loci pairs was 0.1286. The LD between linked markers decreased with the genetic distance between pairs of linked loci. Conclusions: These results will provide an effective aid for future allele mining, association genetics, mapping and cloning gene(s), germplasm conservation, and improvement programs.
dc.formattext/html
dc.languageen
dc.publisherPontificia Universidad Católica de Valparaíso
dc.relation10.2225/vol16-issue5-fulltext-6
dc.rightsinfo:eu-repo/semantics/openAccess
dc.sourceElectronic Journal of Biotechnology v.16 n.5 2013
dc.subjectlandraces
dc.subjectlinkage disequilibrium
dc.subjectpopulation structure
dc.subjectrice
dc.subjectsimple sequence repeats
dc.titleEvaluation of genetic diversity and linkage disequilibrium in Korean-bred rice varieties using SSR markers


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