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The Journal of Heredity 1982:73(2):86-90
© 1982 The American Genetic Association 73:86-90

research-article

Cryptic variability at enzyme loci in three plant species, Avena barbata, Hordeum vulgare, and Zea mays

K. M. Shumaker, R. W. Allard, and A. L. Kahler

University of Redlands Redlands, California 92373; professor of genetics, Department of Genetics. University of California Davis, California 95616; and plant geneticist, USDA, ARS, Northern Grain Insects Research Laboratory RR 3, Brookings South Dakota 57006

Please address reprint requests to Professor Allard

Abstract

A search was conducted for cryptic variability at five enzyme loci that had originally been characterized by horizontal starch gel electrophoresis. No new electromorphs were found at the Est 1 locus in Avena barbata, the Est 2 locus in Hordeum vulgare, or the Got 2 locus in Zea mays. One new electromorphs was found at the Est 1 locus in H. vulgare and two were found at the Got 1 locus in Z. mays. Genetic studies of the three new electromorphs revealed that each is governed by an allele at the enzyme structural locus. The total numbers of alleles at the five loci are now as follows (previously detected numbers of alleles in parentheses): A. barbata, Est 1 7(7); H. vulgare, Est 1 7(6), Est 2 11(11); Z. mays, Got 1 4(2), Got 2 3(3). The impact of cryptic variation on the use of allozymes in population and evolutionary studies in plants is discussed.


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