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Efficiency of microsatellite enrichment inProsopis chilensis using magnetic capture

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Abstract

Microsatellites (i.e., simple sequence repeats [SSRs]) are highly variable genetic markers that are widely used at an intraspecific level in population genetic studies. Here we employed an enrichment strategy for microsatellite isolation by using microsatellite oligoprobes and magnetic capture of the fragments (Fischer and Bachmann, 1998) inProsopis chilensis (Mol.) Stuntz (Fabaceae). We analyzed the obtained level of enrichment by sequencing 120 enriched genomic fragments. A total of 521 SSR motives were detected. According to specific search criteria (SSR motifs ≥3 repeat units and ≥6 bp length), 95.8% of the clones contained SSR motifs. Of these, 7.8% showed homology to chloroplast sequences and 92.2% to nuclear sequences. When regarding only nuclear SSRs with 5 or more repeat units and a minimum length of 10 bp, the level of enrichment was 30.8%. A FASTA search against the European Molecular Biology Laboratory (EMBL) database univocally revealed 4 clones in transcribed regions, 102 clones in genomic regions with unknown function, and 9 clones in chloroplast regions. Among the loci with longer repeat units (≥10 bp, ≥5 repeat units), 3 were in transcribed regions and 65 were in other genomic regions. We discuss the applicability of these markers for population genetic studies.

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Abbreviations

SSR:

simple sequence repeat

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Authors and Affiliations

  1. Institute of Forest Genetics and Forest Tree Breeding, Georg-August University, Göttingen, Büsgenweg 2, 37077, Göttingen, Germany

    Martín C. Mottura, Oliver Gailing & Reiner Finkeldey

  2. IFFIVE-INTA (Institute for Plant Physiology and Plant Pathology-National Institute for Agricultural Technology), Camino 60 Cuadras Km 5,5, 5119, Córdoba, Argentina

    Martín C. Mottura & Aníbal R. Verga

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  1. Martín C. Mottura
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  2. Oliver Gailing
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  3. Aníbal R. Verga
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  4. Reiner Finkeldey
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Correspondence to Oliver Gailing.

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Mottura, M.C., Gailing, O., Verga, A.R. et al. Efficiency of microsatellite enrichment inProsopis chilensis using magnetic capture. Plant Mol Biol Rep 22, 251–258 (2004). https://doi.org/10.1007/BF02773135

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