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Genetic diversity of wheat wild relatives in the Near East detected by AFLP

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Abstract

In order to reveal the molecular genetic diversity of wheat wild relatives, an AFLP analysis was conducted with 16 accessions of five Triticum andAegilops species originating from the Near East. Variation within population was studied with at least seven individuals per accession. Four primer combinations were used for selective amplification. Based on the scored bands, we estimated percentage of polymorphic bands, 1 – proportion of shared bands (1-psb) and nucleotide diversity (π). Of the five species used in this study, Ae. speltoides had the highest level of `within population' variation. This species had also the highest value of the variation among populations. As for Triticum species, the level of variation within population was low in diploid species (T. urartu and T. boeoticum),whereas two tetraploid species (T. dicoccoides and T. araraticum) had relatively high levels of variation within population. While the two diploid Triticum indicated a clear interspecific divergence, the two tetraploid wild wheats were not clearly divergent in this study. The variance portioning analysis indicated that the variation detected for diploid Triticum species was mainly composed of `between species' variation, on the other hand that for tetraploid Triticum was mostly composed of `within population' variation. In conclusion, AFLP analysis reveals molecular variation in all accessions used in this study, suggesting a potential genetic diversity of the wheat wild relatives in natural populations. These results have implications for the design of strategies to maintain genetic diversity within genebank collections.

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Authors and Affiliations

  1. Laboratory of Plant Genetics, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan

    Tsuneo Sasanuma & Takashi R. Endo

  2. Genetic Resources Unit, International Center for Agricultural Research in the Dry Areas, P.O. Box 5466, Aleppo, Syria

    Kamel Chabane & Jan Valkoun

Authors
  1. Tsuneo Sasanuma
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  2. Kamel Chabane
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  3. Takashi R. Endo
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  4. Jan Valkoun
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Sasanuma, T., Chabane, K., Endo, T.R. et al. Genetic diversity of wheat wild relatives in the Near East detected by AFLP. Euphytica 127, 81–93 (2002). https://doi.org/10.1023/A:1019941817057

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