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Ecological correlates of RAPD DNA diversity of wild barley, Hordeum spontaneum, in the Fertile Crescent

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Abstract

Genetic variability in RAPDs (Randomly Amplified Polymorphic DNA) was studied in 104 genotypes of wild barley, Hordeum spontaneum from 21 populations sampled in Israel, Turkey and Iran, seven population from each country. The band (= loci) frequencies were calculated for each population and correlated with ecogeographical variables. In general, high RAPD genetic diversity indices were associated with stressful environments, either with hot or cold steppes and deserts. Interpopulational genetic distances showed no association with the geographic distance between the populations' provenance. Significant Spearman rank correlations between RAPD band frequencies and ecogeographical parameters of provenance occured. Frequencies of RAPD bands were significantly correlated with the principal component factors of allozymes. The correlation data indirectly suggest that natural selection appears to be the major determinant of both RAPD and allozyme diversities both being correlated with environmental stress.

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Authors and Affiliations

  1. Institute of Evolution, University of Haifa, Mt. Carmel, Haifa, 31905, Israel

    Eviatar Nevo & Avigdor Beiles

  2. Central Experimental Farm, Centre for Land and Biological Resources Research, Agriculture and AgriFood Canada, Ottawa, Ontario, Canada

    Bernard Baum

  3. Ottawa-Carleton Institute of Biology, University of Ottawa, 30 Marie Curie, Ottawa, Ontario, Canada, K1N 6N5

    Douglas A. Johnson

Authors
  1. Eviatar Nevo
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  2. Bernard Baum
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  3. Avigdor Beiles
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  4. Douglas A. Johnson
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Nevo, E., Baum, B., Beiles, A. et al. Ecological correlates of RAPD DNA diversity of wild barley, Hordeum spontaneum, in the Fertile Crescent. Genetic Resources and Crop Evolution 45, 151–159 (1998). https://doi.org/10.1023/A:1008616923427

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