The Journal of Heredity 1982:73(2):143-144
© 1982 The American Genetic Association 73:143-144
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Sequences of purothionins and their inheritance in diploid, tetraploid, and hexaploid wheats
U.S. Grain Marketing Research Laboratory USDA, SEA, AR, 1515 College Avenue, Manhattan, KS 66502 [B.L.J. and G.L.L.]; the Department of Biochemistry, University of Alberta Edmonton. Alberta, Canada T6G 2H7 [A.M.]; and the Department of Biochemistry, Kansas State University Manhattan, KS 66508 (D.B.C.)
address reprint requests to: Dr. B. L. Jones, U.S. Grain Marketing Research Laboratory, 1515 College Avenue, Manhattan, KS 66502
Abstract
Purothionins are small basic proteins found In the genus Triticum. Hexaplold wheat (T. aestivum), with genomes A, B, and D, produces three forms of puothionin (
1,
2 and ß) that are all simllar in amino acid sequence. Teiraploid wheat (T. durum), with genomes A and B. produces two forms (
1,ß), whereas a diplold wheat (T. monococcum), with only the A genome, produces only ß-purothionin. The amino acid sequences of the purothlonins examined have been completely conserved during the period in which hexaploid wheat originated from its progenitors.