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GrainGenes Reference Report: PHY-85-425

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Reference	PHY-85-425
Title	Differential suppression of stripe rust resistance in synthetic wheat hexaploids derived from Triticum turgidum subsp. dicoccoides and Aegilops squarrosa
Journal	Phytopathology
Year	1995
Volume	85
Pages	425-429
Author	Kema G Lange W Silfhout C
Abstract	The expression of resistance to stripe rust of wheat, conditioned by four Aegilops squarrosa (DD, 2n = 14) and 11 Triticum turgidum subsp dicoccoides (AABB, 2n = 28) accessions, was studied by testing 22 synthetic hexaploids (AABBDD, 2n = 42) with five stripe rust races in the seedling stage and two races in the adult plant stage Resistance in one or both parents was frequently suppressed in the synthetic hexaploids, indicating the presence of suppressor genes on the AB and D genomes Specificity was apparent because the putative suppressor genes affected the expression of specific resistance genes, although not with all races nor in all growth stages. The results and data from F1 and F2 populations derived from crosses between two synthetic hexaploids with the same T. t. dicoccoides parent but with different A. squarrosa parents revealed that several recessively inherited suppressor genes on the D genome seemed to be involved. A possible mechanism explaining these results and the variable mode of action of suppressors are discussed.
Keyword	aegilops squarrosa [ Show all 15 ]

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