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Science 8 October 1993:
Vol. 262. no. 5131, pp. 233 - 235
DOI: 10.1126/science.262.5131.233
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Articles

Teosinte glume architecture 1: A Genetic Locus Controlling a Key Step in Maize Evolution

Jane Dorweiler 1, Adrian Stec 1, Jerry Kermicle 2, and John Doebley 1

1 Department of Plant Biology, University of Minnesota, St. Paul, MN 55108
2 Laboratory of Genetics, University of Wisconsin, Madison, WI 53706

Teosinte, the probable progenitor of maize, has kernels that are encased in hardened fruitcases, which interfere with the use of the kernels as food. Although the components of the fruitcase are present in maize, their development is disrupted so that the kernels are not encased as in teosinte but exposed on the ear. The change from encased to exposed kernels represents a key step in maize evolution. The locus that largely controls this morphological difference between maize and teosinte, teosinte glume architecture 1, is described and genetically mapped.

Submitted on April 8, 1993
Accepted on August 18, 1993


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