Races of Puccinia graminis on barley, oat, and wheat in Canada in 2013 and 2014

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 2013

		Wheat		Cultivated barley		Wild barley		Total
Race	Virulence spectrum (ineffective Sr genes)	No.	%	No.	%	No.	%	No.	%
Manitoba
MCCFC	5, 7b, 9 g, 17, 10, Tmp, 54	1	7.1	0	0	1	6.3	2	5.3
QFCSC	5, 21, 8a, 9 g, 17, 9a, 9d, 10, 54	11	78.7	7	87.5	12	75.0	30	78.9
QTHJF	5, 21, 11, 6, 8a, 9 g, 9b, 17, 9d, 10, 38, 54	1	7.1	0	0	1	6.3	2	5.3
RFCSC	5, 21, 7b, 8a, 9 g, 17, 9a, 9d, 10, 54	0	0	0	0	2	12.5	2	5.3
RKQSC	5, 21, 7b, 6, 8a, 9 g, 36, 9b, 9a, 9d, 10, 54	1	7.1	0	0	0	0	1	2.6
TMRTF	5, 21, 9e, 7b, 11, 9 g, 36, 9b, 17, 9a, 9d, 10, Tmp, 38, 54	0	0	1	12.5	0	0	1	2.6
Ontario
QFCSC	5, 21, 8a, 9 g, 17, 9a, 9d, 10, 54	3	100	0	0	0	0	3	100
Quebec
MCCFC	5, 7b, 9 g, 17, 10, Tmp, 54	1	100	0	0	0	0	1	100
Saskatchewan
QFCSC	5, 21, 8a, 9 g, 17, 9a, 9d, 10, 54	3	100	1	100	18	100	22	100
Total
MCCFC	5, 7b, 9 g, 17, 10, Tmp, 54	2	9.5	0	0	1	2.9	3	4.7
QFCSC	5, 21, 8a, 9 g, 17, 9a, 9d, 10, 54	17	81.0	8	88.9	30	88.2	55	85.9
QTHJF	5, 21, 11, 6, 8a, 9 g, 9b, 17, 9d, 10, 38, 54	1	4.8	0	0	1	2.9	2	3.1
RFCSC	5, 21, 7b, 8a, 9 g, 17, 9a, 9d, 10, 54	0	0	0	0	2	5.9	2	3.1
RKQSC	5, 21, 7b, 6, 8a, 9 g, 36, 9b, 9a, 9d, 10, 54	1	4.8	0	0	0	0	1	1.6
TMRTF	5, 21, 9e, 7b, 11, 9 g, 36, 9b, 17, 9a, 9d, 10, Tmp, 38, 54	0	0	1	11.1	0	0	1	1.6

The letter code race designation described by Jin et al. (2008) uses 20 single-gene differential lines (Sr5, 21, 9e, 7b, 11, 6, 8a, 9 g, 36, 9b, 30, 17, 9a, 9d, 10, Tmp, 24, 31, 38, and 54) grouped into five subsets of four lines each. The race is determined by the seedling reaction (low or high) on each line.

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 2013 to single-gene stem rust differential lines

	Wheat										Cultivated barley		Wild barley
	Manitoba		Ontario		Quebec		Saskatchewan		Manitoba		Saskatchewan		Manitoba		Saskatchewan
Gene	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%
Sr5	14	100	3	100	1	100	3	100	8	100	1	100	16	100	18	100
Sr21	13	92.9	3	100	0	0	3	100	8	100	1	100	15	93.8	18	100
Sr9e	0	0	0	0	0	0	0	0	1	12.5	0	0	0	0	0	0
Sr7b	2	14.3	0	0	1	100	0	0	1	12.5	0	0	3	18.8	0	0
Sr11	1	7.1	0	0	0	0	0	0	1	12.5	0	0	1	6.3	0	0
Sr6	2	14.3	0	0	0	0	0	0	0	0	0	0	1	6.3	0	0
Sr8a	13	92.9	3	100	0	0	3	100	7	87.5	1	100	15	93.8	18	100
Sr9g	14	100	3	100	1	100	3	100	8	100	1	100	16	100	18	100
Sr36	1	7.1	0	0	0	0	0	0	1	12.5	0	0	0	0	0	0
Sr9b	2	14.3	0	0	0	0	0	0	1	12.5	0	0	1	6.3	0	0
Sr30	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Sr17	13	92.9	3	100	1	100	3	100	8	100	1	100	16	100	18	100
Sr9a	12	85.7	3	100	0	0	3	100	8	100	1	100	14	87.5	18	100
Sr9d	13	92.9	3	100	0	0	3	100	8	100	1	100	15	93.8	18	100
Sr10	14	100	3	100	1	100	3	100	8	100	1	100	16	100	18	100
SrTmp	1	7.1	0	0	1	100	0	0	1	12.5	0	0	1	6.3	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	1	7.1	0	0	0	0	0	0	1	12.5	0	0	1	6.3	0	0
Sr54	14	100	3	100	1	100	3	100	8	100	1	100	16	100	18	100

Table 3. Frequencies of races of Puccinia graminis f. sp. avenae obtained from cultivated and wild oat in Manitoba, Ontario, and Saskatchewan, Canada in 2013

		Cultivated oat		Wild oat		Total
Race	Virulence spectrum (ineffective Pg genes)	No.	%	No.	%	No.	%
Manitoba
TGD (NA29)	1, 2, 3, 4, 8, 15	0	0	1	1.0	1	0.7
TGL (NA28)	1, 2, 3, 4, 8, 12, Pg-a	0	0	1	1.0	1	0.7
TGN (2006)	1, 2, 3, 4, 8, 12, 15, Pg-a	1	2.6	10	10.3	11	8.1
TJD (NA30)	1, 2, 3, 4, 8, 9, 15	0	0	1	1.0	1	0.7
TJJ (NA67)	1, 2, 3, 4, 8, 9, 13, 15	10	26.3	23	23.7	33	24.4
TJN (2006)	1, 2, 3, 4, 8, 9, 12, 15, Pg-a	2	5.3	1	1.0	3	2.2
TJS (2005)	1, 2, 3, 4, 8, 9, 12, 13, 15, Pg-a	25	65.8	60	61.9	85	63.0
Ontario
TJS (2005)	1, 2, 3, 4, 8, 9, 12, 13, 15, Pg-a	1	100.0	0	0	1	100.0
Saskatchewan
SGD (NA63)	1, 2, 3, 8, 15	1	5.6	1	2.0	2	1.8
TGB (NA27)	1, 2, 3, 4, 8	0	0	1	2.0	1	0
TGD (NA29)	1, 2, 3, 4, 8, 15	1	5.6	3	6.0	4	1.8
TGN (2006)	1, 2, 3, 4, 8, 12, 15, Pg-a	3	16.7	8	16.0	11	7.1
TJD (NA30)	1, 2, 3, 4, 8, 9, 15	0	0	3	6.0	3	0
TJJ (NA67)	1, 2, 3, 4, 8, 9, 13, 15	4	22.2	11	22.0	15	25.0
TJN (2006)	1, 2, 3, 4, 8, 9, 12, 15, Pg-a	1	5.6	1	2.0	2	5.4
TJS (2005)	1, 2, 3, 4, 8, 9, 12, 13, 15, Pg-a	8	44.4	22	44.0	30	58.9
Total
SGD (NA63)	1, 2, 3, 8, 15	1	1.8	1	0.7	2	1.0
TGB (NA27)	1, 2, 3, 4, 8	0	0	1	0.7	1	0.5
TGD (NA29)	1, 2, 3, 4, 8, 15	1	1.8	4	2.7	5	2.5
TGL (NA28)	1, 2, 3, 4, 8, 12, Pg-a	0	0	1	0.7	1	0.5
TGN (2006)	1, 2, 3, 4, 8, 12, 15, Pg-a	4	7.0	18	12.2	22	10.8
TJD (NA30)	1, 2, 3, 4, 8, 9, 15	0	0	4	2.7	4	2.0
TJJ (NA67)	1, 2, 3, 4, 8, 9, 13, 15	14	24.6	34	23.1	48	23.5
TJN (2006)	1, 2, 3, 4, 8, 9, 12, 15, Pg-a	3	5.3	2	1.4	5	2.5
TJS (2005)	1, 2, 3, 4, 8, 9, 12, 13, 15, Pg-a	34	59.6	82	55.8	116	56.9

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 4. Frequencies of races of Puccinia graminis f. sp. avenae obtained from cultivated and wild oat in Manitoba, Ontario, and Saskatchewan, Canada in 2014

		Cultivated oat		Wild oat		Total
Race	Virulence spectrum (ineffective Pg genes)	No.	%	No.	%	No.	%
Manitoba
NGB (NA23)	1, 3, 8	0	0	1	2.4	1	1.4
TGB (NA27)	1, 2, 3, 4, 8	1	3.1	0	0	1	1.4
TGN (2006)	1, 2, 3, 4, 8, 12, 15, Pg-a	1	3.1	1	2.4	2	2.7
TJJ (NA67)	1, 2, 3, 4, 8, 9, 13, 15	6	18.8	8	19.0	14	18.9
TJS (2005)	1, 2, 3, 4, 8, 9, 12, 13, 15, Pg-a	24	75.0	32	76.2	56	75.7
Ontario
TJS (2005)	1, 2, 3, 4, 8, 9, 12, 13, 15, Pg-a	1	100	0	0	1	100.0
Saskatchewan
TGN (2006)	1, 2, 3, 4, 8, 12, 15, Pg-a	0	0	1	8.3	1	5.3
TJG (NA76)	1, 2, 3, 4, 8, 9, 13	1	14.3	0	0	1	5.3
TJJ (NA67)	1, 2, 3, 4, 8, 9, 13, 15	2	28.6	2	16.7	4	21.1
TJS (2005)	1, 2, 3, 4, 8, 9, 12, 13, 15, Pg-a	4	57.1	9	75.0	13	68.4
Total
NGB (NA23)	1, 3, 8	0	0	1	1.9	1	1.1
TGB (NA27)	1, 2, 3, 4, 8	1	2.2	0	0	1	1.1
TGN (2006)	1, 2, 3, 4, 8, 12, 15, Pg-a	1	2.2	2	3.7	3	3.2
TJG (NA76)	1, 2, 3, 4, 8, 9, 13	1	2.2	0	0	1	1.1
TJJ (NA67)	1, 2, 3, 4, 8, 9, 13, 15	8	17.8	10	18.5	18	19.1
TJS (2005)	1, 2, 3, 4, 8, 9, 12, 13, 15, Pg-a	34	75.6	41	75.9	70	74.5

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 Manitoba, Ontario, and Saskatchewan, Canada in 2013 to single-gene stem rust differential lines and the Pg-a gene complex

	Cultivated oat						Wild oat
	Manitoba		Ontario		Saskatchewan		Manitoba		Saskatchewan		Total
Resistance Gene	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%
Pg1	38	100	1	100	18	100	97	100	50	100	204	100
Pg2	38	100	1	100	18	100	97	100	50	100	204	100
Pg3	38	100	1	100	18	100	97	100	50	100	204	100
Pg4	38	100	1	100	17	94.4	97	100	49	98.0	202	99.0
Pg6	0	0	0	0	0	0	0	0	0	0	0	0
Pg8	38	100	1	100	18	100	97	100	50	100	204	99.2
Pg9	37	97.4	1	100	13	72.2	85	87.6	37	74.0	173	84.8
Pg10	0	0	0	0	0	0	0	0	0	0	0	0
Pg12	28	73.7	1	100	12	66.7	72	74.2	31	62.0	144	70.6
Pg13	35	92.1	1	100	12	66.7	83	86.6	33	66.0	164	80.4
Pg15	38	100	1	100	18	100	96	99.0	49	98.0	202	99.0
Pg16	0	0	0	0	0	0	0	0	0	0	0	0
Pg-a	28	73.7	1	100	12	66.7	72	74.2	31	62.0	144	70.6

Table 6. Frequencies of virulence of Puccinia graminis f. sp. avenae isolates collected from cultivated and wild oat in Saskatchewan, Ontario, and Manitoba, Canada in 2014 to single-gene stem rust differential lines and the Pg-a gene complex

			Cultivated oat						Wild oat
Resistance	Manitoba		Ontario		Saskatchewan		Manitoba		Saskatchewan		Total
Gene	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%
Pg1	32	100	1	100	7	100	42	100	12	100	94	100
Pg2	32	100	1	100	7	100	41	97.6	12	100	93	98.9
Pg3	32	100	1	100	7	100	42	100	12	100	94	100
Pg4	32	98.9	1	100	7	100	41	97.6	12	100	93	98.9
Pg6	0	0	0	0	0	0	0	0	0	0	0	0
Pg8	32	100	1	100	7	100	42	100	12	100	94	100
Pg9	30	93.8	1	100	7	75.0	40	95.2	11	91.7	89	94.7
Pg10	0	0	0	0	0	0	0	0	0	0	0	0
Pg12	25	78.1	1	100	4	57.1	33	78.6	10	83.3	73	77.7
Pg13	30	93.8	1	100	7	100	40	95.2	11	91.7	89	94.7
Pg15	31	96.9	1	100	6	85.7	41	97.6	12	100	91	96.8
Pg16	0	0	0	0	0	0	0	0	0	0	0	0
Pg-a	25	78.1	1	100	4	57.1	33	78.6	10	83.3	73	77.7

Jin Y, Szabo L, Pretorius Z, Singh R, Ward R, Fetch T. 2008. Detection of virulence to resistance gene Sr24 within race TTKS of Puccinia graminis f. sp. tritici. Plant Dis. 92:923–926. doi:10.1094/PDIS-92-6-0923.

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Fetch TG Jr., Jin Y. 2007. Letter code system of nomenclature for Puccinia graminis f. sp. avenae. Plant Dis. 91:763–766. doi:10.1094/PDIS-91-6-0763.

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