Virulence phenotypes of Puccinia striiformis in Alberta from 2009–2011

Figures & data

Table 1.  Virulence frequency of Puccinia striiformis f. sp. tritici and f. sp. hordei on wheat and barley differentials

				P. striiformis f. sp. hordei frequency (%)
Differential host	Resistance gene	Differential line	P. striiformis f. sp. tritici frequency (%)	All isolates	Pathotype group A	Pathotype group B
Wheat	Null	Avocet S	100	89	79	100
Wheat	YrA	Avocet R	100	49	0	100
Wheat	Yr1	Yr1/6*Avocet S	12	84	74	94
Wheat	Yr2	Yr2/6*Avocet S	100	14	0	28
Wheat	Yr5	Yr5/6*Avocet S	0	0	0	0
Wheat	Yr6	Yr6/6*Avocet S	100	62	42	83
Wheat	Yr7	Yr7/6*Avocet S	100	2.7	0	5.6
Wheat	Yr8	Yr8/6*Avocet S	100	0	0	0
Wheat	Yr9	Yr9/6*Avocet S	100	0	0	0
Wheat	Yr10	Yr10/6*Avocet S	19	0	0	0
Wheat	Yr15	Yr15/6*Avocet S	0	0	0	0
Wheat	Yr17	Yr17/6*Avocet S	100	0	0	0
Wheat	Yr24	Yr24/3*Avocet S	10	0	0	0
Wheat	YrUnk^a	Yr26/6*Avocet S	100	57	21	94
Wheat	Yr27	Yr27/6*Avocet S	100	0	0	0
Wheat	Yr28	Yr28/3*Avocet S	16	0	0	0
Wheat	Yr31	Yr31/3*Avocet S	100	92	84	100
Wheat	YrSP	YrSP/3*Avocet S	1.5	0	0	0
Wheat	YrCV	YrCV/6*Avocet S	100	0	0	0
Wheat	Yr17, YrTye	Hyak	10	0	0	0
Wheat	Yr10,YrMor	Moro	19	0	0	0
Wheat	YrPa1,YrPa2,YrPa3	Paha	34	0	0	0
Wheat	YrPr1,YrPr2	Produra	100	0	0	0
Wheat	Yr3a,YrS,YrSte	Stephens	100	41	0	83
Wheat	YrTye	Tyee	10	0	0	0
Wheat	Yr2,Yr4a, YrYam	Yamhill	100	0	0	0
Barley	Null	Topper	6.0	100	100	100
Barley	Rps4, rpsHF	Heils Franken	0	0	0	0
Barley	rpsEm1&2	Emir	0	0	0	0
Barley	Rps4, rpsAst	Astrix	0	0	0	0
Barley	rpsHi1&2	Hiproly	0	78	79	78
Barley	rpsVa1&2	Varunda	0	41	79	0
Barley	rps2	Abed Binder 12	1.5	97	95	100
Barley	rpsTr1&2	Trumpf	0	70	63	78
Barley	Rps1.c	Mazurka	0	51	100	0
Barley	Rps1.b	Bigo	0	51	100	0
Barley	Rps3, rpsI5	I 5	0	8.1	16	0
Barley	unknown	Bancroft	0	54	89	17
^a YrUkn was initially believed to be Yr26, but later found not to be Yr26 and different from any known Yr genes (Sharma-Poudyal et al., 2013).

Table 2.  Virulence frequency of Puccinia striiformis f. sp. tritici and f. sp. hordei on barley, triticale and wheat cultivars

				P. striiformis f. sp. hordei frequency (%)
Crop	Habit	Cultivar/ genotype	P. striiformis f. sp. tritici frequency (%)	All isolates	Pathotype group A	Pathotype group B
Wheat	spring	AC Barrie	100	0	0	0
Wheat	spring	AC Crystal	99	0	0	0
Wheat	winter	AC Bellatrix	100	89	84	94
Wheat	winter	Radiant	19	0	0	0
Triticale	spring	AC Ultima	97	41	0	83
Barley	spring	Seebe	0	49	89	5.6
Barley	spring	Falcon	3.0	57	42	72
Barley	spring	Condor	0	76	79	72
Barley	spring	Mahigan	93	100	100	100
Barley	spring	HB522	100	100	100	100

Fig. 1. Similarity dendrogram based on simple matching coefficient of 104 Puccinia striiformis isolates collected from within Alberta based on virulence or avirulence to wheat, barley and triticale differentials and cultivars. Vertical lines to the right show the two formae speciales Pst (Puccinia striiformis f. sp. tritici) and Psh (Puccinia striiformis f. sp. hordei) as well as the two pathotype groups (A & B) within Puccinia striiformis f. sp. hordei.

Table 3.  Virulence spectra and frequency of Puccinia striiformis f. sp. tritici pathotypes sampled from 2009 to 2011 in Alberta

	Differential genotype																											Host of origin
Pathotype	Null	YrA	Yr1	Yr2	Yr5	Yr6	Yr7	Yr8	Yr9	Yr10	Yr15	Yr17	Yr24	YrUnk	Yr27	Yr28	Yr31	YrSP	YrCV	Hyak	Moro	Paha	Produra	Stephens	Tyee	Yamhill	# ^b	Spring wheat	Winter wheat	Wheat (unknown)	Triticale	Foxtail barley	Barley	Year of 1^st detection inAlberta ^c
4	V ^a	V		V		V	V	V	V	V		V		V	V		V		V		V		V	V		V	5		5					2010 ^d
5	V	V		V		V	V	V	V	V		V	V	V	V	V	V		V		V		V	V		V	4	1	3					2009
6	V	V		V		V	V	V	V			V		V	V	V	V		V				V	V		V	2		2					2010 ^e
7	V	V		V		V	V	V	V			V		V	V		V		V				V	V		V	32	9	10	4	1	5	3	2007
14	V	V		V		V	V	V	V			V		V	V		V		V			V	V	V		V	9	4	4			1		2010
15	V	V		V		V	V	V	V	V		V		V	V		V		V		V	V	V	V		V	2		2					2010
16	V	V	V	V		V	V	V	V			V		V	V		V		V	V		V	V	V	V	V	6	1	4			1		2011
17	V	V		V		V	V	V	V	V		V	V	V	V	V	V		V		V	V	V	V		V	2		2					2011
18	V	V		V		V	V	V	V			V		V	V	V	V		V			V	V	V		V	2		2					2011
19	V	V		V		V	V	V	V			V	V	V	V	V	V		V			V	V	V		V	1	1						2011
20	V	V	V	V		V	V	V	V			V		V	V		V		V				V	V		V	1				1			2011
21	V	V	V	V		V	V	V	V			V		V	V		V	V	V	V		V	V	V	V	V	1	1						2011
^aV virulent.
^bTotal number of isolates collected of a pathotype.
^cRefers to this paper or Kumar et al. (2012).
^dDetected earlier in 2009 British Columbia, Canada (Kumar et al., 2012).
^eDetected in 2005 in Manitoba, Canada (Kumar et al., 2012).

Table 4.  Virulence spectra and frequency of Puccinia striiformis f. sp. hordei pathotypes sampled from 2009 to 2011 in Alberta

			Differential genotype													Host of origin
Pathotype group	Pathotype	Race	Topper	Heils Franken	Emir	Astrix	Hiproly	Varunda	Abed Binder 12	Trumpf	Mazurka	Bigo	I 5	Bancroft	Number of isolates	Two-row barley	Six-row barley	Barley – unknown variety	Foxtail barley	Winter wheat	Year of first detection in Alberta	Year of first detection in the USA
A	2	PSH-76	V ^a				V	V	V	V	V	V		V	8	1	5	2			2008	2006
	3	−	V				V	V	V		V	V		V	3		3				2008	−
	7	−	V					V	V	V	V	V		V	1				1		2007	−
	11	−	V				V		V		V	V			1	1					2008	−
	14	−	V								V	V			1	1					2008	−
	16	−	V						V		V	V		V	2	2					2010	−
	17	PSH-69	V				V	V	V	V	V	V	V	V	3	3					2011	2003
B	15	PSH-33	V						V						2		2				2008	1996
	18	PSH-52	V				V		V	V					9	1	5		1	2	2010	1998
	19	PSH-56	V				V		V	V				V	3	1	2				2010	2001
	20	PSH-46	V						V	V					2		2				2010	1996
	21	PSH-51	V				V		V						2	1	1				2011	1998
^aV virulent

Sharma-Poudyal, D., Chen, X.M., Wan, A.M., Zhan, G.M., Kang, Z.S., Cao, S.Q., et al. (2013). Virulence characterization of international collections of the wheat stripe rust pathogen, Puccinia striiformis f.sp. tritici. Plant Dis 97, 379–386

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Kumar , K. , Holtz , M.D. , Xi , K. and Turkington , T.K. 2012 . Virulence of Puccinia striiformis on wheat and barley in central Alberta . Can. J. Plant Pathol. , 34 : 551 – 561 .

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