Origin and usefulness of catalogued and temporarily designated Sr genes in conferring seedling and/or adult plant resistance to all Puccinia graminis f. sp. tritici races belonging to the Ug99 lineage (after Singh et al., 2015)

Origin of Sr genes	Stem rust resistance (Sr) genes
	Ineffective	Effective
Triticum aestivum	5, 6, 7a, 7b, 8a, 8b, 9a, 9b, 9f, 9h, 10, 16, 18, 19, 20, 23, 30, 41, 49, 54, McN, Tmp (or Sha7)a,b, Wld-1	15a,b,f, 28a, 29b,c, 42a,b, 48, 55b,d, 56b,d, 57b,d, 58b,d, Huw234a,b , ND643b, Yayeb
Triticum turgidum	9d, 9e, 9g, 11, 12, 17	2b,d , 13a,b , 14a,b
Triticum monococcum	21	22, 35 a
Triticum timopheevi	36	37c
Aegilops speltoides		32c , 39c , 47e
Aegilops tauschii		33b , 45a,b , 46a,e, TA10171e, TA10187a,e, TA1662a,e
Aegilops searsii		51
Aegilops geniculata		53
Dasypyrum villosum		52
Triticum comosum	34
Triticum ventricosum	38
Triticum araraticum		40c
Thinopyrum elongatum	24	25a , 26, 43a,c
Thinopyrum intermedium		44 a ,c
Secale cereale	31	27a, 50a,1RS(Amigo)a,b

^a Virulence for the gene is known to occur in other races

^b Level of resistance conferred in the field usually inadequate under high disease pressure

^c Unsuitable for utilization due to linkage with undesirable traits in the translocation

^d Confers slow rusting adult plant resistance

^e Not tested for resistance to Ug99 in field trials to determine effectiveness

^f Data from multiple research groups are not consistent; initial studies determined Sr15 was ineffective however recent data shows avirulence in Ug99 lineage