Sequences of purothionins and their inheritance in di ploid tetra ploid and hexa ploid wheats

Jones, B.L.; Lookhart, G.L.; Mak, A.; Cooper, D.B.

Journal of Heredity 73(2): 143-144


ISSN/ISBN: 0022-1503
Accession: 006394329

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Purothionins are small basic proteins found in the genus Triticum. Hexaploid wheat (T. aestivum), with genomes A, B, and D, produces 3 forms of purothionin (.alpha.1, .alpha.2 and .beta.) that are all similar in amino acid sequence. Tetraploid wheat (T. durum), with genomes A and B, produces 2 forms (.alpha.1, .beta.) whereas a diploid wheat (T. monococcum), with only the A genome, produces only .beta.-purothionin. The amino acid sequences of the purothionins examined were completely conserved during the period in which hexaploid wheat originated from its progenitors.