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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
Published by: National Academy of Sciences
Stable URL: http://www.jstor.org/stable/59833
Page Count: 6
You can always find the topics here!Topics: Chromosomes, Diploidy, Phosphatases, Hexaploidy, Genomes, Enzymes, Genes, Genetics, Plants, Genetic variation
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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.
Proceedings of the National Academy of Sciences of the United States of America © 1969 National Academy of Sciences