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Differences in the Embryo-Specific Globulins among Maize Inbred Lines and Their Hybrids¹

The subunit composition of the major seed embryo globulins of corn (Zea mays L.) was studied in a series of inbred lines and their hybrids. Polypeptides of molecular weight (in kilodaltons kD) of 65, 50, to all inbred: and hybrids examined. Certain genotypes contained additional polypeptides. For instance, embryos of Mo17 contained a 58 kD polypeptide not found in B73, and embryos of B73 contained a 42 kD polypeptide not found in Mo17. The hybrid B73 x Mo17 contained both of these polypeptides. These results suggest the pattern of embryo globulin peptides is distinctive in a particular inbred line and could be employed as part of a test for identity.

Key Words: Zea mays (L.) • Inbreds • Co-dominance • SDS polyacrylamide gel electrophoresis • Globulins • Embryo proteins

² Senior research scientist and associate scientist, respectively.

Received for publication February 17, 1983.

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