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Detection of genetic diversity in closely related bread wheat using microsatellite markers

Abstract

Wheat microsatellites (WMS) were used to estimate the extent of genetic diversity among 40 wheat cultivars and lines, including mainly European elite material. The 23 WMS used were located on 15 different chromosomes, and revealed a total of 142 alleles. The number of alleles ranged from 3 to 16, with an average of 6.2 alleles per WMS. The average dinucleotide repeat number ranged from 13 to 41. The correlation coefficient between the number of alleles and the average number of repeats was only slight (r s = 0.55). Based on percentage difference a dendrogram is presented, calculated by the WMS-derived data. All but two of the wheat cultivars and lines could be distinguished. Some of the resulting groups are strongly related to the pedigrees of the appropriate cultivars. Values for co-ancestry (f) of 179 pairs of cultivars related by their pedigrees (f⩾0.1) averaged 0.29. Genetic similarity (GS) based on WMS of the same pairs averaged 0.44. The rank correlation for these pairs was slight, with r s = 0.55, but highly significant (P<0.001). The results suggest that a relatively small number of microsatellites can be used for the estimation of genetic diversity and cultivar identification in elite material of hexaploid bread wheat.

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Communicated by G. Wenzel

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Plaschke, J., Ganal, M.W. & Röder, M.S. Detection of genetic diversity in closely related bread wheat using microsatellite markers. Theoret. Appl. Genetics 91, 1001–1007 (1995). https://doi.org/10.1007/BF00223912

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  • DOI: https://doi.org/10.1007/BF00223912

Key words

  • Co-ancestry
  • Genetic diversity
  • Microsatellites
  • Wheat