2007 Winter Elite Wheat trial



Clinton C. Shock, Eric P. Eldredge, and Lamont D. Saunders

Malheur Experiment Station

Jim Peterson and Mike Flowers

Crop and Soil Science

Oregon State University

Ontario, OR



Introduction

Malheur Experiment Station provides one location for the Oregon State University Statewide Winter Elite Wheat variety testing program. This location compares soft white winter wheat variety performance in a furrow-irrigated, high yield potential environment. Plant breeders can use information on variety performance to compare advanced lines with released cultivars. Growers can use this information to make decisions about which soft white winter wheat varieties may perform best in their fields.


Methods

The trial was grown on Owyhee silt loam where the previous crop was sweet corn. After harvest, the corn stalks were flailed, the field was disked, and the soil was sampled and analyzed. The analysis showed 264 lb available nitrogen (N) per acre in the top 2 ft of soil. The top foot of soil contained 35 ppm phosphorus (P), 368 ppm potassium (K), and 13 ppm sulfate (SO4)/acre, 1,878 ppm calcium (Ca), 506 ppm magnesium (Mg), 96 ppm sodium (Na), 1 ppm zinc (Zn), 7 ppm iron (Fe), 6 ppm manganese (Mn), 0.7 ppm copper (Cu), 0.3 ppm boron (B), pH 7.2, and 1.75 percent organic matter. Pre-plant fertilizer consisted of 2 lb B/acre that was broadcast on October 5, 2006. The crop received no further fertilization during the production cycle. The soil was deep ripped, plowed, and groundhogged to prepare the seedbed. The field was corrugated into 30-inch rows.

The Winter Elite Wheat Trial was comprised of 40 soft white winter (SWW) wheat cultivars or lines, five of which were club types, and eight with resistance to imazamox herbicide for use in the BASF "Clearfield®" system (designated SWW-CI). Seed was treated with Dividend® XL RTA® fungicide seed treatment. The experimental design was a randomized complete block with three replications. Grain was planted on October 19, 2006, with a small-plot grain drill in plots 5 by 20 ft, and the field was recorrugated. Seed was planted at 30 live seed/ft2, corresponding to approximately 110 lb/acre. The soil was dry so the wheat was irrigated on October 24, 2006. There was slow emergence and little growth through the dry winter.

Broadleaf weeds were controlled with Bronate Advance herbicide at 18 oz/acre applied on April 24. Alleys were cut with a sickle bar mower on June 15. Plant height at maturity was measured in the trial on July 6. The alleys were recut with a Hege plot combine on July 16 and the resulting length of each plot was measured and recorded. The plots were harvested on July 17 with a Hege plot combine. Yield and test weight differences were compared using ANOVA and least significant differences at the 5 percent probability level, LSD (0.05). Differences in yield or test weight between varieties should be equal to or greater than the corresponding LSD (0.05) value before any variety is considered different from another in this trial.


Results

The date of 50 percent heading in the Winter Elite Wheat Trial varieties, when half of the culms had extended the peduncle above the collar of the flag leaf, ranged from May 20 (day of year 140) for 'ORH010837' and 'Gene' to May 30 (day of year 150) for 'ARS00235' (Table 1). Height at maturity ranged from 35.3 inches for Gene to 43.7 inches for 'ARSC96059-1' and 'ID99-435'. No lodging was observed in any of the varieties. Test weights in this year ranged from 58.7 lb/bu for 'OR2050910' to 62.5 lb/bu for 'ORH010085'. Protein content of the grain ranged from 7.0 percent for 'ID9364901A' to 8.9 percent for Gene.

Yields ranged from 132.7 bu/acre for '99x1009-23' to 86.2 bu/acre for 'Cara' club wheat (Table 2). Among the highest yielding wheat varieties in 2007 were the top 17 lines in the trial from 99x1009-23 to 'Salute'. 'Stephens', a check variety in this trial, and the soft white winter wheat variety most commonly grown in this production area, continues to show excellent yield performance, placing among the top yielding varieties in the trial at 130.4 bu/acre.

Information on previous wheat trials at Malheur Experiment Station is available on the web at http://cropinfo.net. Information on the performance of the varieties in this trial at other Oregon locations is available on the web at http://cropandsoil.oregonstate.edu/wheat/state_performance_data.htm.








Table 1. Winter Elite Wheat Trial market class, test weight, percent moisture, protein, plant height, and 50 percent heading date, Malheur Experiment Station, Oregon State University, Ontario, OR, 2007.



2007 agronomic data

Variety

Class

Test weight

Harvest moisture

Plant height

Heading date

Protein



lb/bu

%

inches

DOY

%

99x1009-23

SWW

59.9

9.4

43.3

146.0

7.6

ID9364901A

SWW

60.5

9.3

41.3

142.0

7.0

STEPHENS

SWW

60.1

9.4

40.0

143.0

7.9

MASAMI

SWW

60.4

9.2

41.7

149.0

7.6

GOETZE (ORH010920)

SWW

59.9

9.2

37.7

141.0

8.2

TUBBS

SWW

60.8

8.8

42.0

143.0

8.0

ORH010085

SWW

62.5

9.3

37.7

145.0

8.4

XERPHA (WA 7973)

SWW

61.4

9.2

40.7

148.0

8.2

OSUPOP-27-3

SWW

60.8

9.3

40.7

148.0

7.8

WEATHERFORD

SWW

61.0

9.2

41.0

145.0

8.7

TUBBS-06/ROD BLEND

SWW

60.5

9.3

41.3

147.0

7.5

OR2050913

SWW

59.7

9.4

41.3

149.0

8.2

OR2050910

SWW

58.9

9.3

40.3

147.0

8.2

WESTBRED 528

SWW

61.4

9.4

39.7

141.0

8.0

ORH010837

SWW

59.1

9.3

37.7

140.0

7.9

IDAHO 587

SWW

60.4

9.4

39.7

145.0

7.9

SALUTE

SWW

60.9

9.2

41.0

145.0

7.9

BRUNDAGE 96

SWW

59.7

9.1

38.0

148.0

8.1

ARSC96059-1

Club

62.2

9.4

43.7

148.0

7.5

SIMON

SWW

60.6

9.3

40.3

148.0

8.1

BU6W00-523

SWW

60.9

9.3

39.7

146.0

7.7

OR2010239

SWW

59.2

9.3

39.3

144.0

7.8

ARS00235

Club

60.6

9.4

43.3

150.0

7.7

OR2050914

SWW

59.5

9.5

40.3

149.0

7.9

ID99-435

SWW

60.5

9.4

43.7

141.0

8.3

TUBBS-06

SWW

60.6

9.3

41.0

144.0

7.8

OR9901619

SWW

60.2

9.4

42.7

148.0

7.8

ORSS-1757

SWW

60.2

9.2

40.7

145.0

7.6

ARS970278-2

Club

60.1

9.4

41.7

145.0

8.1

ID92-22407A

SWW

60.8

9.3

43.0

145.0

7.5

GENE

SWW

60.3

9.2

35.3

140.0

8.9

ORI2042037

SWW

59.8

9.4

39.0

149.0

7.6

AP 700CL

SWW

61.9

9.3

41.7

143.0

7.9

MADSEN

SWW

60.6

9.1

38.0

147.0

7.6

ORCF-102

SWW

60.7

9.4

40.7

145.0

7.9

ORCF-101

SWW

60.5

9.3

38.3

145.0

8.2

CARA

Club

59.3

9.2

36.3

151.0

8.7

Site Average


60.5

9.3

40.4

145.5

7.9

LSD (0.05)


0.4

0.3

2.0


0.5

CV (%)


0.4

1.9

3.1


3.5






Table 2. Winter Elite Wheat Trial market class, yield ranked by 2007 productivity, and 2-year and 3-year average yields. All yields are at 12 percent moisture. Grain yields shaded in gray are not significantly different from the highest yield at this site. Malheur Experiment Station, Oregon State University, Ontario, OR, 2007.




2007 yields

2-year average yield

3-year average yield

Variety


Class

Yield

Rank

Yield

Rank

Yield

Rank




bu/acre


bu/acre


bu/acre


99x1009-23


SWW

132.7

1





ID9364901A


SWW

131.3

2





STEPHENS


SWW

130.4

3

118.5

1

123.4

2

MASAMI


SWW

128.1

4

111.6

5

118.6

6

GOETZE (ORH010920)


SWW

122.8

5

113.0

2

124.3

1

TUBBS


SWW

122.4

6

107.8

10

120.9

3

ORH010085


SWW

122.3

7

112.2

3

119.6

5

XERPHA (WA 7973)


SWW

121.9

8





OSUPOP-27-3


SWW

120.8

9





WEATHERFORD


SWW

120.6

10

111.7

4

116.8

9

TUBBS-06/ROD BLEND


SWW

120.3

11





OR2050913


SWW

120.2

12





OR2050910


SWW

119.0

13





WESTBRED 528


SWW

118.4

14

107.5

11

120.1

4

ORH010837


SWW

117.7

15

108.5

8



IDAHO 587


SWW

117.7

16

108.4

9

118.3

8

SALUTE


SWW

116.7

17





BRUNDAGE 96


SWW

116.3

18

104.3

14

112.5

13

ARSC96059-1


Club

115.6

19

105.0

13



SIMON


SWW

115.3

20

101.7

17

115.6

10

BU6W00-523


SWW

115.1

21





OR2010239


SWW

113.6

22

111.1

6

118.5

7

ARS00235


Club

113.0

23





OR2050914


SWW

113.0

24





ID99-435


SWW

112.3

25

103.4

16



TUBBS-06


SWW

111.9

26

111.0

7



OR9901619


SWW

111.0

27

104.3

15

113.2

12

ORSS-1757


SWW

109.3

28

98.7

21

111.9

15

ARS970278-2


Club

107.4

29





ID92-22407A


SWW

107.1

30

100.1

20

113.5

11

GENE


SWW

106.4

31

97.6

22

107.8

17

ORI2042037


SWW

105.7

32

105.7

12



AP 700CL


SWW

104.3

33





MADSEN


SWW

104.1

34

101.6

18

111.0

16

ORCF-102


SWW

101.4

35

100.2

19

112.0

14

ORCF-101


SWW

99.3

36

95.3

23

106.6

18

CARA


Club

86.2

37

83.1

24



Site Average



114.9


105.1


115.8


LSD (0.05)



16.3


12.4


9.2


CV (%)



8.7


10.3


8.5