Use of allele specificity of comigrating AFLP markers to align genetic maps from different potato genotypes |
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Authors: | J N A M Rouppe van der Voort P van Zandvoort H J van Eck R T Folkertsma R C B Hutten J Draaistra F J Gommers E Jacobsen J Helder and J Bakker |
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Institution: | (1) The Graduate School of Experimental Plant Sciences, Wageningen Agricultural University, Department of Nematology, P.O. Box 8123, 6700 ES Wageningen, The Netherlands, NL;(2) The Graduate School of Experimental Plant Sciences, Wageningen Agricultural University Department of Plant Breeding, P.O. Box 386, 6700 AJ Wageningen, The Netherlands, NL |
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Abstract: | The allele specificity of AFLP markers was assessed in five relatively unrelated potato genotypes. To this end, two diploid
mapping populations of potato, F1SH × RH and F1AM × RH, were analysed using four and six AFLP primer combinations, respectively, recently applied to the analysis of the
genetically well characterized backcross population BC_C × E. The AFLP profiles of the five parents revealed 733 AFLP markers
and, when identical primer combinations were used, 131 comigrating AFLP markers were identified. After construction of five
parental maps, the genomic positions of these comigrating AFLP markers were compared and 117 markers (89%) which targeted
the same genomic region were assumed to be homologous. Of these putative homologues, 20 markers, each cloned from at least
two genotypes, were sequenced and 19 sets of amplification products were shown to be nearly identical. The number of AFLP
markers previously mapped in population BC_C × E ranged from three to eleven per chromosome, which allowed a reliable assessment
of chromosome numbers from individual linkage groups obtained in populations F1SH × RH and F1AM × RH. The high incidence of corresponding AFLP alleles was confirmed by using an additional set of five primer combinations.
The 733 AFLP markers localized provide a valuable reference collection for future mapping studies in potato. As a consequence
AFLP analysis may replace more laborious locus-specific marker techniques.
Received: 26 July 1996 / Accepted: 30 January 1997 |
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Keywords: | Comparative mapping DNA markers Solanum tuberosum |
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