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  • 1
    ISSN: 1432-2242
    Keywords: Key words Simple sequence repeats ; Linkage maps ; Sugar beet ; Marker-assisted selection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  A set of informative simple sequence repeat markers has been identified for use in the marker-assisted breeding of Beta vulgaris. Highly enriched small insert genomic libraries were constructed, consisting of 1536 clones (with inserts of between 250–900 bp). Screening the clones with CA, CT, CAA, CATA and GATA nucleotide-repeat probes revealed positive hybridisation to over 50% of the clones. Of these 340 were sequenced. Primer pairs were designed for sequences flanking the repeats and, of these, 57 pairs revealed length polymorphism with 12 Beta accessions. Heterozygosity levels of the SSR loci ranged from 0.069 to 0.809. Heterozygosity levels were found to be similar to those detected employing RFLP probes with the same accessions. Phenetic analysis using the markers, indicated relationships in accordance with known pedigrees. Twenty three of the SSR markers were polymorphic in one or both of two F2 mapping populations, and were placed relative to a framework of RFLP probes. The markers are distributed over all nine linkage groups of sugar beet.
    Type of Medium: Electronic Resource
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