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Natural selection of allozyme polymorphisms: a microgeographical differentiation by edaphic, topographical, and temporal factors in wild emmer wheat (Triticum dicoccoides)

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Summary

Allozymic variation in proteins encoded by 47 loci was analyzed electrophoretically in 1983/4 and 1984/5 in 356 individual plants of wild emmer wheat, Triticum dicoccoides, from a microsite at Tabigha, north of the Sea of Galilee, Israel. Each year the test involved two 100-meter transects, each equally subdivided into basalt and terra rossa soil types, and comparisons were based on 16 common polymorphic loci. Significant genetic differentiation, genetic phase disequilibria, and genome organization according to soil type were found over very short distances. Our results suggest that allozyme polymorphisms in wild emmer wheat are partly adaptive, and that they differentiate at both single and multilocus structures primarily from environmental stress of such ecological factors as soil type, topography, and temporal changes, probably through aridity stress.

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Authors and Affiliations

  1. Institute of Evolution, University of Haifa, Mt. Carmel, 31999, Haifa, Israel

    E. Nevo, A. Beiles & T. Krugman

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  1. E. Nevo
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  2. A. Beiles
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  3. T. Krugman
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Communicated by H. F. Linskens

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Nevo, E., Beiles, A. & Krugman, T. Natural selection of allozyme polymorphisms: a microgeographical differentiation by edaphic, topographical, and temporal factors in wild emmer wheat (Triticum dicoccoides). Theoret. Appl. Genetics 76, 737–752 (1988). https://doi.org/10.1007/BF00303521

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  • DOI: https://doi.org/10.1007/BF00303521

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