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dc.contributorRobertson, Larry D.en_US
dc.contributorWeigand, F.en_US
dc.contributorBaum, Michaelen_US
dc.contributorKahl, G.en_US
dc.creatorUdupa, Sripada M.en_US
dc.identifier.citationSripada M. Udupa, Larry D. Robertson, F. Weigand, Michael Baum, G. Kahl. (1/3/1999). Allelic variation at (TAA)(n) microsatellite loci in a world collection of chickpea (Cicer arletinum L. ) germplasm. Molecular and General Genetics MGG, 261, pp. 354-363.en_US
dc.description.abstractA set of 12 randomly selected (TAA), microsatellite loci of the cultivated chickpea (Cicer arietinum L.) were screened in a worldwide sample comprising 72 landraces, four improved cultivars and two wild species of the primary gene pool (C. reticulatum and C. echinosperum) to determine the level and pattern of polymorphism in these populations. A single fragment was amplified from all the accessions with each of 12 sequence-tagged microsatellite site markers,except; for one locus where no fragment was obtained from either of the two wild species. There was a high degree of intraspecific polymorphism at these microsatellite loci, although isozymes, conventional RFLPs and RAPDs show very little or no polymorphism. Overall, the repeat number at a locus (excluding null alleles) ranged from 7 to 42. The average number of alleles per locus was 14.1 and the average genetic diversity was 0.86. Based on the estimates obtained, 11 out of the 12 frequency distributions of alleles at the loci tested can be considered to be non-normal. A significant positive correlation between the average number of repeats (size of the locus) and the amount of variation was observed, indicating that replication slippage may be the molecular mechanism involved in generation of variability at the loci. A comparison between the infinite allele and stepwise mutation models revealed that for 11 out of the 12 loci the number of alleles observed fell in between the values predicted by the two models. Phylogenetic analysis of microsatellite polymorphism in C. arietinum showed no relationship between accession and geographic origin, which is compatible with the recent expansion of this crop throughout the world.en_US
dc.publisherSpringer Verlag (Germany)en_US
dc.sourceMolecular and General Genetics MGG;261,Pagination 354-363en_US
dc.subjectstepwise mutation modelen_US
dc.subjectmicrosatellite polymorphismen_US
dc.subjectmutation mechanismsen_US
dc.subjectreplication slippageen_US
dc.subjectinfinite allele modelen_US
dc.titleAllelic variation at (TAA)(n) microsatellite loci in a world collection of chickpea (Cicer arletinum L.) germplasmen_US
dc.typeJournal Articleen_US
cg.creator.idUdupa, Sripada M.: 0000-0003-4225-7843en_US
cg.creator.idBaum, Michael: 0000-0002-8248-6088en_US
cg.contributor.centerInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.centerGoethe University-Frankfurt - GU-Frankfurten_US
cg.contributor.funderInternational Center for Agricultural Research in the Dry Areas - ICARDAen_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 and General Genetics MGGen_US

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