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Biochemical Genetics

, Volume 21, Issue 7–8, pp 667–689 | Cite as

Inheritance, intracellular localization, and genetic variation of phosphoglucomutase isozymes in maize (Zea mays L.)

  • C. W. Stuber
  • M. M. Goodman
Article

Abstract

Phosphoglucomutase (PGM; EC 2.7.5.1) isozyme variants were studied in a large number of inbred lines, crosses, and races of maize (Zea mays L.). Patterns of Mendelian inheritance demonstrated for PGM isozyme variants indicated that they are encoded by nuclear genes. Two unlinked loci, Pgm1 and Pgm2, located on the long arm of chromosome 1 and the short arm of chromosome 5, respectively, specify the observed electrophoretic variation on starch gels. No intra- or interlocus hybrid bands were found, suggesting that each isozyme band consists of a single polypeptide. PGM isozymes were present in all plant parts studied and the activity specified by both loci appears to reside in the cytoplasm. In studies of 520 racial collections of maize from Latin America, a single allele at each locus predominated in most collections. Likewise, the same alleles predominated in a set of 406 inbred lines of maize from the United States and Canada.

Key words

phosphoglucomutase (PGM) Zea mays L. isozyme patterns races of maize maize inbred lines 

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Copyright information

© Plenum Publishing Corporation 1983

Authors and Affiliations

  • C. W. Stuber
    • 1
  • M. M. Goodman
    • 2
  1. 1.Agricultural Research Service, USDA, and Department of GeneticsNorth Carolina State UniversityRaleigh
  2. 2.Department of StatisticsNorth Carolina State UniversityRaleigh

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