2010 Winter Wheat Variety Performance Data Now Available – for Sep. 2, 2010

To assist Manitoba farmers with variety selections this fall, Manitoba Agriculture, Food and Rural Initiatives (MAFRI) and MCVET (Manitoba Crop Variety Evaluation Team) is publishing the most recent variety descriptions and performance data for winter wheat. Farmers should consider a number of factors when selecting a winter wheat variety, including yield potential, agronomic and disease package, and marketing options.

YIELD POTENTIAL

Yield is based on the genetic potential and environmental conditions in which the crop is grown. Farmers should look at long-term, multi-site data and select those varieties that perform well not only in their area but across locations and years.

In the 2010 Winter Wheat Variety Descriptions table, the

CDC Buteo

CDC Falcon

CDC Harrier

CDC Raptor

McClintock~

Radiant~

Accipiter~

Broadview~

CDC Ptarmigan

Peregrine~

Sunrise

~ Indicates a variety that is protected by Plant Breeder’s Rights or a variety where protection has been applied for but not yet granted at time of printing.

CDC Buteo

CDC Falcon

CDC Raptor

McClintock~

Accipiter~

Broadview~

CDC Ptarmigan

Peregrine~

Sunrise

~ Indicates a variety that is protected by Plant Breeder’s Rights or a variety where protection has been applied for but not yet granted at time of printing.

101 100 102 97 97

95

104 105 105 108

116

“Yield % Check” column provides an indication of how a variety performed compared to the check CDC Falcon.

The “Site Years Tested” shows the number of sites where an entry has been tested with CDC Falcon. The more site years, the more dependable the data. Remember that only direct comparisons can be made between CDC Falcon and whichever variety chosen to compare it to. For example, direct comparisons cannot be made between Accipiter and Radiant as those varieties may never have been tested in the same trial. The grey “Check Characteristics” box displays the long-term yield, number of site years and other check attributes.

The 2010 Winter Wheat Yield Comparisons table provides individual site data. Note the grey shaded area as it provides important information needed to read the data. The check yield (CDC Falcon) in bushels per acre is listed below each site. CV is the Coefficient of Variation

99 100 91

95

105 105 108 108

116

56

46

64

63

39

13

7

29

13

7

78

100

67

77

95

92

112

97

101

4 0 4 4 5

7

3 1 3 2

4

79 100 76

69

87 108 78 99

91

4

0

8

3

7

4

3

2

8

10

6

and it is an indicator of how uniform a trial is; the smaller the CV, the greater the chance that true differences were found between varieties in the trial. LSD stands for Least Significant Difference and it shows the percentage that individual varieties must differ by to be considered significantly different. Sign Diff stands for significant difference and a “yes” or “no” will indicate if a real difference exists between varieties at an individual site. While data from single sites is often more interesting, individual site data, and even data accumulated over numerous sites in a single year must always be viewed with caution varieties that excel under one set of environmental conditions may not perform as well under the next year’s conditions.

LOOK AT THE TOTAL PACKAGE, NOT JUST YIELD

Although yield is generally the first information looked at, farmers also need to compare

G VG G VG VG

VG

VG VG F G

G

110

100

107

114

113

114

117

118

159

G

G

G

VG

VG

VP

VG

VG

P

VG

G

103 100 94

99

110 102 90 104

101

G G P G G

VP

G VG P G

G

varieties for maturity, height, standability, resistance to disease and relative winter hardiness when selecting a variety that is best suited to their farm. Two factors farmers should think about when selecting a variety, taking into consideration the 2010 crop year, are fusarium head blight and stubble conditions.

FUSARIUM HEAD BLIGHT

Downgrading due to fusarium head blight (FHB) infection was an issue for many winter wheat producers this year. Winter wheat varieties generally have poor genetic tolerance to FHB. As such, varieties currently available are generally considered susceptible, effectively removing variety selection as a management tool. However, earlier flowering of winter wheat, relative to spring wheat, may allow winter wheat to escape infection. Management strategies such as early seeding date (ideally

104

100

94

102

107

100

131

111

120

VG

F

G

G

F

VG

G

G

G

VG

G

107 100 114

111

118 115 132 116

117

SeCan

SeCan

SeCan

SeCan

CANTERRA SEEDS

CANTERRA SEEDS

SeCan

CANTERRA SEEDS

Western Ag

SeCan

Western Ag

109

100

78

88

103

103

96

110

114

before Labour Day) and shallow seeding (aim for a half inch) can have a large influence on the crop’s ability for early flowering.

STUBBLE CONDITIONS

Ask any winter wheat grower and they will say the key to successful winter wheat production is having suitable stubble available in the ideal planting window. To optimize winter survival, stubble needs to hold four inches or more of snow. If farmers are facing poor stubble conditions, they should consider other compensating factors that may contribute to winter hardiness.

Variety selection can be one tool. Relative winter hardiness ratings presented in the variety descriptions table are derived from data presented at time of registration as well as grower experience. For newer varieties there is limited information currently available. As varieties are grown on more acres in commercial production, a better understanding of winter hardiness will follow.

However, the winter wheat varieties available for production in Manitoba all have good winter hardiness if no-till seeded into standing stubble. In addition to variety selection, farmers should consider increasing their seeding rates if seeding into less-than- ideal stubble. Since there are differences in seed size, instead of aiming for a seeding rate in bushels per acre, take into consideration target final plant stand, germination percentage and thousand kernel weight when figuring out seeding rate. Farmers should also use other best management practices to help ensure winter survival such as early seeding, seeding shallow, using starter fertilizer, and employing a weed management program in the fall.

CHANGES COMING

Winter wheat has a number of end-use and marketing opportunities, including milling, feed grain and ethanol production. Manitoba farmers should take note as of August 1, 2013, CDC Kestrel, CDC Clair, CDC Harrier, CDC Raptor and CDC Falcon will be moved from the Canada Western Red Winter (CWRW) class to the Canada Western General Purpose (CWGP) class.

In the interim, there are proposed grade standards changes that will take effect August 1, 2011. The changes include a minimum grade specification of 11 per cent protein for No. 1 and No. 2 CWRW, create a No. 3 CWRW grade for deliveries with less than 11 per cent protein, and reduce fusarium-damaged kernels tolerances.

Farmers need to be aware of these changes as variety selection will impact end-use and marketing opportunities.SEED MANITOBAwill continue to provide the latest unbiased information on winter wheat varieties for Manitoba producers. SEED MANITOBAis a collaborative effort between the Manitoba Seed Growers’ Association, Manitoba Agriculture, Food and Rural Initiatives and the Manitoba Co-operator.Data for all crops will be published inSEED MANITOBA2011 this December.

———

2010 WINTER WHEAT VARIETY DESCRIPTIONS

Resistance to:VarietyCanada Western Red WinterYield % CheckSite Years TestedDays to Maturity +/-CheckHeight +/-CheckLodgingStem RustLeaf RustRelative Winter Hardiness

Distributor

———

Canada Western General Purpose

———

DH99W18I*45 DH99W19H*16

Varieties that are being tested or proposed for registration

DH00W31N*34

CHECK CHARACTERISTICS

CDC Falcon

105

107

104

82 bu/ac

7

13

7

69 site years

2

2

1

7

6

1

26 inches

G

VG

VG

VG

VG

VG

VG

VG

VG

G

G

G

———

2010 WINTER WHEAT YIELD COMPARISONS

VARIETYCanada Western Red Winter2010 Average YieldArborgCarmanRoblin2010 Yield: % of CDC FalconRosebankStonewallWawanesa

Winnipeg

———

Canada Western General Purpose

———

DH00W31N*34

Varieties that are being tested or proposed for registration

DH99W18I*45

DH99W19H*16

CHECK YIELD

105

114

104

CDC Falcon (bu/ac)

CV %

LSD %

Sign Diff

84

128

83

66

7.8

13

Yes

104

105

106

83

7.6

13

Yes

125

109

103

93

11.8

20

Yes

110

109

105

75

5.8

10

Yes

97

106

105

87

4.4

7

Yes

123

115

117

69

7.5

13

Yes

90

128

105

75

7.5

13

Yes

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