Races of Puccinia graminis on wheat, oat, and barley in Canada in 2009 and 2010

Figures & data

Table 1. Frequencies of races of Puccinia graminis f. sp. tritici obtained from wheat trap plots, cultivated barley, and wild barley in Manitoba, Ontario, Quebec, and Saskatchewan, Canada in 2009.

		Wheat		Cultivated barley		Wild barley		Total
Race	Virulence spectrum (ineffective Sr genes)	No.	%	No.	%	No.	%	No.	%
Manitoba
MCCFC	5, 7b, 9g, 17, 10, Tmp, McN	0	0	0	0	1	14.3	1	6.3
QFCSC	5, 21, 8a, 9g, 17, 9a, 9d, 10, McN	6	75.0	1	100	6	85.7	13	81.2
TPMKC	5, 21, 9e,7b, 11, 8a, 9g, 36, 17, 9d, 10, Tmp, McN	2	25.0	0	0	0	0	2	12.5
Ontario
QFCSC	5, 21, 8a, 9g, 17, 9a, 9d, 10, McN	0	0	5	83.3	0	0	5	71.4
RFCSC	5, 21, 7b, 8a, 9g, 17, 9a, 9d, 10, McN	1	100	1	16.7	0	0	2	28.6
Quebec
QFCSC	5, 21, 8a, 9g, 17, 9a, 9d, 10, McN	1	100	0	0	0	0	1	100
Saskatchewan
QFCSC	5, 21, 8a, 9g, 17, 9a, 9d, 10, McN	3	100	0	0	15	100	18	100
Total
MCCFC	5, 7b, 9g, 17, 10, Tmp, McN	0	0	0	0	1	4.5	1	2.4
QFCSC	5, 21, 8a, 9g, 17, 9a, 9d, 10, McN	10	76.9	6	85.7	21	95.5	37	88.0
RFCSC	5, 21, 7b, 8a, 9g, 17, 9a, 9d, 10, McN	1	7.7	1	14.3	0	0	2	4.8
TPMKC	5, 21, 9e,7b, 11, 8a, 9g, 36, 17, 9d, 10, Tmp, McN	2	15.4	0	0	0	0	2	4.8

Single-gene differential lines used for race pathotyping are Sr5, 21, 9e, 7b, 11, 6, 8a, 9g, 36, 9b, 30, 17, 9a, 9d, 10, Tmp, 24, 31, 38, and McN.

Table 2. Frequency of virulence of Puccinia graminis f. sp. tritici isolates collected from wheat trap plots, cultivated barley, and wild barley in Manitoba, Ontario, Quebec, and Saskatchewan, Canada in 2009 to single-gene stem rust differential lines.

	Wheat						Cultivated barley						Wild barley
Resistance	Manitoba		Ontario		Quebec		Saskatchewan		Manitoba		Ontario		Manitoba		Saskatchewan
Gene	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%
Sr5	8	100	1	100	1	100	3	100	1	100	6	100	7	100	15	100
Sr21	8	100	1	100	1	100	3	100	1	100	6	100	6	86	15	100
Sr9e	2	25	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Sr7b	2	25	1	100	0	0	0	0	0	0	1	17	1	14	0	0
Sr11	2	25	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Sr6	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Sr8a	8	100	1	100	1	100	3	100	1	100	6	100	6	86	15	100
Sr9g	8	100	1	100	1	100	3	100	1	100	6	100	7	100	15	100
Sr36	2	25	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Sr9b	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Sr30	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Sr17	8	100	1	100	1	100	3	100	1	100	6	100	7	100	15	100
Sr9a	6	75	1	100	1	100	3	100	1	100	6	100	6	86	15	100
Sr9d	8	100	1	100	1	100	3	100	1	100	6	100	6	86	15	100
Sr10	8	100	1	100	1	100	3	100	1	100	6	100	7	100	15	100
SrTmp	2	25	0	0	0	0	0	0	0	0	0	0	1	14	0	0
Sr24	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Sr31	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Sr38	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
SrMcN	8	100	1	100	1	100	3	100	1	100	6	100	7	100	15	100

Table 3. Frequencies of races of Puccinia graminis f. sp. avenae obtained from cultivated and wild oat in Saskatchewan and Manitoba, Canada in 2009.

	Virulence spectrum	Cultivated oat		Wild oat		Total
Race	(ineffective Pg genes)	No.	%	No.	%	No.	%
Saskatchewan
SGD (NA63)	1, 2, 3, 8, 15	0	0	2	2.4	2	2.3
TGB (NA27)	1, 2, 3, 4, 8	0	0	3	3.7	3	3.4
TGD (NA29)	1, 2, 3, 4, 8, 15	1	20.0	26	31.7	27	31.0
TGN (2006)	1, 2, 3, 4, 8, 12, 15, Pg-a	1	20.0	12	14.7	13	14.9
TJB (NA68)	1, 2, 3, 4, 8, 9	0	0	1	1.2	1	1.1
TJD (NA30)	1, 2, 3, 4, 8, 9, 15	0	0	9	11.0	9	10.3
TJJ (NA67)	1, 2, 3, 4, 8, 9, 13, 15	2	40.0	3	3.7	5	5.7
TJN (2006)	1, 2, 3, 4, 8, 9, 12, 15, Pg-a	1	20.0	20	24.4	21	24.1
TJS (2005)	1, 2, 3, 4, 8, 9, 12, 13, 15, Pg-a	0	0	6	7.3	6	6.9
Manitoba
SGB (NA23)	1, 2, 3, 8	0	0	1	0.6	1	0.5
TGB (NA27)	1, 2, 3, 4, 8	2	5.6	21	11.7	23	10.6
TGD (NA29)	1, 2, 3, 4, 8, 15	10	27.8	55	30.6	65	30.1
TGL (NA28)	1, 2, 3, 4, 8, 12, Pg-a	1	2.8	1	0.6	2	0.9
TGN (2006)	1, 2, 3, 4, 8, 12, 15, Pg-a	4	11.1	28	15.6	32	14.8
TJB (NA68)	1, 2, 3, 4, 8, 9	0	0	4	2.2	4	1.9
TJD (NA30)	1, 2, 3, 4, 8, 9, 15	1	2.8	3	1.7	4	1.9
TJG (NA76)	1, 2, 3, 4, 8, 9, 13	0	0	1	0.6	1	0.5
TJJ (NA67)	1, 2, 3, 4, 8, 9, 13, 15	7	19.4	22	12.2	29	13.4
TJL (new*)	1, 2, 3, 4, 8, 9, 12, Pg-a	1	2.8	2	1.1	3	1.4
TJN (2006)	1, 2, 3, 4, 8, 9, 12, 15, Pg-a	7	19.4	21	11.7	28	13.0
TJS (2005)	1, 2, 3, 4, 8, 9, 12, 13, 15, Pg-a	3	8.3	21	11.7	24	11.1
Total
SGB (NA23)	1, 2, 3, 8	0	0	1	0.4	1	0.3
SGD (NA63)	1, 2, 3, 8, 15	0	0	2	0.8	2	0.7
TGB (NA27)	1, 2, 3, 4, 8	2	4.9	24	9.2	26	8.6
TGD (NA29)	1, 2, 3, 4, 8, 15	11	26.8	81	30.9	92	30.4
TGL (NA28)	1, 2, 3, 4, 8, 12, Pg-a	1	2.4	1	0.4	2	0.7
TGN (2006)	1, 2, 3, 4, 8, 12, 15, Pg-a	5	12.2	40	15.3	45	14.9
TJB (NA68)	1, 2, 3, 4, 8, 9	0	0	5	1.9	5	1.7
TJD (NA30)	1, 2, 3, 4, 8, 9, 15	1	2.4	12	4.6	13	4.3
TJG (NA76)	1, 2, 3, 4, 8, 9, 13	0	0	1	0.4	1	0.3
TJJ (NA67)	1, 2, 3, 4, 8, 9, 13, 15	9	22.0	25	9.5	34	11.2
TJL (new*)	1, 2, 3, 4, 8, 9, 12, Pg-a	1	2.4	2	0.8	3	1.0
TJN (2006)	1, 2, 3, 4, 8, 9, 12, 15, Pg-a	8	19.5	41	15.6	49	16.2
TJS (2005)	1, 2, 3, 4, 8, 9, 12, 13, 15, Pg-a	3	7.3	27	10.3	30	9.9

The letter code race designation described by Fetch and Jin (2007) uses 12 single-gene differential lines (Pg1, 2, 3, 4, 6, 8, 9, 10, 12, 13, 15, and 16) grouped into three subsets of four lines each. The race is determined by the seedling reaction (low or high) on each line. The equivalent North American (NA) race code or year of discovery is provided in parentheses.

*Denotes that TJL is a novel race found in 2009 that was not previously described.

Table 4. Frequencies of races of Puccinia graminis f. sp. avenae obtained from cultivated and wild oat in Saskatchewan and Manitoba, Canada in 2010.

	Virulence spectrum	Cultivated oat		Wild oat		Total
Race	(ineffective Pg genes)	No.	%	No.	%	No.	%
Saskatchewan
SGB (NA23)	1, 2, 3, 8,	0	0	3	7.3	3	5.7
TGB (NA27)	1, 2, 3, 4, 8	2	16.7	9	22.0	11	20.8
TGD (NA29)	1, 2, 3, 4, 8, 15	3	25.0	8	19.5	11	20.8
TGL (NA28)	1, 2, 3, 4, 8, 12, Pg-a	1	8.3	0	0	1	1.9
TGN (2006)	1, 2, 3, 4, 8, 12, 15, Pg-a	3	25.0	10	24.4	13	24.5
TJD (NA30)	1, 2, 3, 4, 8, 9, 15	0	0	1	2.4	1	1.9
TJJ (NA67)	1, 2, 3, 4, 8, 9, 13, 15	0	0	2	4.9	2	3.8
TJN (2006)	1, 2, 3, 4, 8, 9, 12, 15, Pg-a	3	25.0	5	12.2	8	15.1
TJS (2005)	1, 2, 3, 4, 8, 9, 12, 13, 15, Pg-a	0	0	3	7.3	3	5.7
Manitoba
SGD (NA63)	1, 2, 3, 8, 15	1	3.0	1	1.2	2	1.7
TGB (NA27)	1, 2, 3, 4, 8	4	12.1	19	22.1	23	19.3
TGD (NA29)	1, 2, 3, 4, 8, 15	2	6.1	11	12.8	13	10.9
TGL (NA28)	1, 2, 3, 4, 8, 12, Pg-a	0	0	3	3.5	3	2.5
TGN (2006)	1, 2, 3, 4, 8, 12, 15, Pg-a	6	18.2	28	32.6	34	28.6
TJB (NA68)	1, 2, 3, 4, 8, 9	1	3.0	2	2.3	3	2.5
TJD (NA30)	1, 2, 3, 4, 8, 9, 15	1	3.0	0	0	1	0.8
TJG (NA76)	1, 2, 3, 4, 8, 9, 13	1	3.0	2	2.3	3	2.5
TJJ (NA67)	1, 2, 3, 4, 8, 9, 13, 15	4	12.1	3	3.5	7	5.9
TJN (2006)	1, 2, 3, 4, 8, 9, 12, 15, Pg-a	5	15.2	11	12.8	16	13.4
TJS (2005)	1, 2, 3, 4, 8, 9, 12, 13, 15, Pg-a	8	24.2	6	7.0	14	11.8
Total
SGB (NA23)	1, 2, 3, 8	0	0	3	2.4	3	1.7
SGD (NA63)	1, 2, 3, 8, 15	1	2.2	1	0.8	2	1.2
TGB (NA27)	1, 2, 3, 4, 8	6	13.3	28	22.0	34	19.8
TGD (NA29)	1, 2, 3, 4, 8, 15	5	11.1	19	15.0	24	14.0
TGL (NA28)	1, 2, 3, 4, 8, 12, Pg-a	1	2.2	3	2.4	4	2.3
TGN (2006)	1, 2, 3, 4, 8, 12, 15, Pg-a	9	20.0	38	29.9	47	27.3
TJB (NA68)	1, 2, 3, 4, 8, 9	1	2.2	2	1.6	3	1.7
TJD (NA30)	1, 2, 3, 4, 8, 9, 15	1	2.2	1	0.8	2	1.2
TJG (NA76)	1, 2, 3, 4, 8, 9, 13	1	2.2	2	1.6	3	1.7
TJJ (NA67)	1, 2, 3, 4, 8, 9, 13, 15	4	8.9	5	3.9	9	5.2
TJN (2006)	1, 2, 3, 4, 8, 9, 12, 15, Pg-a	8	17.8	16	12.6	24	14.0
TJS (2005)	1, 2, 3, 4, 8, 9, 12, 13, 15, Pg-a	8	17.8	9	7.1	17	9.9

The letter code race designation described by Fetch and Jin (2007) uses 12 single-gene differential lines (Pg1, 2, 3, 4, 6, 8, 9, 10, 12, 13, 15, and 16) grouped into three subsets of four lines each. The race is determined by the seedling reaction (low or high) on each line. The equivalent North American (NA) race code or year of discovery is provided in parentheses.

Table 5. Frequencies of virulence of Puccinia graminis f. sp. avenae isolates collected from cultivated and wild oat in Saskatchewan and Manitoba, Canada in 2009 to single-gene stem rust differential lines and the Pg-a gene complex.

	Cultivated oat						Wild oat
Resistance	Saskatchewan		Manitoba		Total		Saskatchewan		Manitoba		Total
Gene	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%
Pg1	5	100	36	100	41	100	82	100	180	100	262	100
Pg2	5	100	36	100	41	100	82	100	180	100	262	100
Pg3	5	100	36	100	41	100	82	100	180	100	262	100
Pg4	5	100	36	100	41	100	80	97.6	179	99.4	259	98.9
Pg6	0	0	0	0	0	0	0	0	0	0	0	0
Pg8	5	100	36	100	41	100	82	100	180	100	262	100
Pg9	3	60.0	19	52.8	22	53.7	39	47.6	74	41.1	147	43.9
Pg10	0	0	0	0	0	0	0	0	0	0	0	0
Pg12	2	40.0	16	44.4	18	43.9	38	46.3	73	40.6	111	42.4
Pg13	2	40.0	10	27.8	12	29.3	9	11.0	44	24.4	53	20.2
Pg15	5	100	32	88.9	37	90.2	78	95.1	150	83.3	228	87.0
Pg16	0	0	0	0	0	0	0	0	0	0	0	0
Pg-a	1	20.0	12	33.3	13	31.7	25	30.5	44	24.4	69	26.3

Table 6. Frequencies of virulence of Puccinia graminis f. sp. avenae isolates collected from cultivated and wild oat in Saskatchewan and Manitoba, Canada in 2010 to single-gene stem rust differential lines and the Pg-a gene complex.

	Cultivated oat						Wild oat
Resistance	Saskatchewan		Manitoba		Total		Saskatchewan		Manitoba		Total
Gene	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%
Pg1	12	100	33	100	45	100	41	100	86	100	127	100
Pg2	12	100	33	100	45	100	41	100	86	100	127	100
Pg3	12	100	33	100	45	100	41	100	86	100	127	100
Pg4	12	100	32	97.0	44	97.8	38	92.7	85	98.8	123	96.9
Pg6	0	0	0	0	0	0	0	0	0	0	0	0
Pg8	12	100	33	100	45	100	41	100	86	100	127	100
Pg9	3	25.0	20	60.6	23	51.1	11	26.8	24	27.9	35	27.6
Pg10	0	0	0	0	0	0	0	0	0	0	0	0
Pg12	7	58.3	19	57.6	26	57.8	18	43.9	48	55.8	66	52.0
Pg13	0	0	13	39.4	13	28.9	5	12.2	11	12.8	16	12.6
Pg15	9	75.0	27	81.8	36	80.0	29	70.7	60	69.8	89	70.1
Pg16	0	0	0	0	0	0	0	0	0	0	0	0
Pg-a	4	33.3	12	36.4	16	35.6	17	41.5	33	38.4	50	39.4

Fetch TG Jr., Jin Y. 2007. Letter code system of nomenclature for Puccinia graminis f. sp. avenae. Plant Dis. 91:763–766.

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