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Published in Crop Sci 9:643-644 (1969)
© 1969 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Further Isozyme Differences Among the Inbred Parents of a Reciprocal Recurrent Selection Population of Maize1

A. H. D. Brown and R. W. Allard2

Four additional isozyme differences among the I2 inbred parents of two reciprocal recurrent selection populations (A and B) of maize arc described. Some common problems in the resolution of mobility differences are exemplified by the properties of these systems. Evidence is cited which shows that the mobility differences between single bands in these systems arise from codominant allelic variation at single loci. Data are reported concerning the linkage relationships of these four loci with each other, and with five previously described isozyme loci. Individual seedlings can be scored for all nine loci simultaneously, and therefore can be assigned to one of many thousand potential genotypic classes in monitoring the genetic effects of this selection regime.

Key Words: Isozyme resolution prolems • Acetate esterases • Butyrate esterase • Phosphatase • Linked isozyme markers

1 Contribution from the Department of Agronomy and Range Science and the Department of Genetics, University of California, Davis, Calif. 9561 1969. This work was supported in part by grants from the National Science Foundation (GB 246) and the National Institutes of Health (GM 10476).

2 Research Assistant, Department of Agronomy and Range Science, and Professor of Genetics.

Received for publication March 20, 1969.




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