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Genetic variation in constant environments

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Summary

Allozymic variation in proteins encoded by 32 gene loci was analyzed electrophoretically in 64 specimens from 6 localities representing 2 species of the spadefoot toadsPelobates syriacus andP. cultripes from Israel and Portugal, respectively. Out of the 32 loci examined,Esterase-1 was the only locus that proved strongly polymorphic in all 6 localities and in the 2 species. The pattern of genetic variation inPelobates is best explained by the environmental variability model. Selection for homozygosity as an adaptive strategy seems to operate in the relatively constant and narrow subterranean niche.

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Authors and Affiliations

  1. Department of Biology, University of Haifa, Mount Carmel, Haifa, Israel

    E. Nevo

Authors
  1. E. Nevo
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Additional information

Prof.J. M. Cei kindly sent me from Portugal the specimens ofP. cultripes. Mr.M. Avrahami and Mrs.Hana Bar-el assisted in field and laboratory work. Dr.S. H. Yang assisted in the electrophoretic work. Mr.S. Mendlinger critically commented the manuscript. This work was supported by U.S. Israel Binational Science Foundation Grant No. 330 toE. Nevo andR. C. Lewontin. I am grateful to all.

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Nevo, E. Genetic variation in constant environments. Experientia 32, 858–859 (1976). https://doi.org/10.1007/BF02003729

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  • DOI: https://doi.org/10.1007/BF02003729

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