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Studies of Isozyme Patterns in Nullisomic-Tetrasomic Combinations of Hexaploid Wheat

George J. Brewer, Charles F. Sing and E. R. Sears
Proceedings of the National Academy of Sciences of the United States of America
Vol. 64, No. 4 (Dec. 15, 1969), pp. 1224-1229
Stable URL: http://www.jstor.org/stable/59833
Page Count: 6
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Studies of Isozyme Patterns in Nullisomic-Tetrasomic Combinations of Hexaploid Wheat
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Abstract

Thirty-eight wheat strains, each nullisomic for one chromosome and tetrasomic for a homoeologous (related) one, were analyzed electrophoretically for 12 different enzymes, and a gene (or genes) for alkaline phosphatase was localized to chromosomes 4B and 4D. The other 11 enzymes showed no significant electrophoretic variation. The fact that the only mutants observed affect the same enzyme favors the concept that rigorous selection operates in the polyploids both to preserve certain types of variants and to eliminate others.

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