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



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



Journal of Heredity 73(2): 143-144



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.

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