Genetics, Vol 120, 587-596, Copyright © 1988


INVESTIGATIONS

The Mutator-Related Cy Transposable Element of Zea mays L. Behaves as a Near-Mendelian Factor

P. S. Schnable and P. A. Peterson
Present address: Department of Genetics Iowa State University, Ames, Iowa 50011.

The bz-rcy allele arose in a single gamete of the TEL (transposable-element laden) population, when the rcy receptor element inserted into the Bronze1 locus. This newly arisen receptor allele conditions a stable bronze kernel phenotype in the absence of the independently segregating regulatory element, Cy. In the presence of Cy, bz-rcy conditions fully colored spots on a bronze background. The spots represent clonal sectors arising from mutations of bz-rcy to Bz'. Although Cy exhibits genetic interactions with the Mutator system it differs from Mu-homologous elements in its near-Mendelian behavior which is in contrast to the non-Mendelian inheritance of Mutator and Mu-homologous elements. Evidence is presented which suggests that the timing and mode of Cy transposition differ from those of Mu1.


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M. de la Luz Gutierrez-Nava, C. A. Warren, P. Leon, and V. Walbot
Transcriptionally Active MuDR, the Regulatory Element of the Mutator Transposable Element Family of Zea mays, Is Present in Some Accessions of the Mexican land race Zapalote chico
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