8-21-09 wheat variety tests

8-21-09 wheat variety tests

August 21, 2009

The attainable wheat yield in a particular season is mainly determined by the 

  • wheat variety,
  • management input, and
  • growing conditions Mother Nature provides.

Of these three factors, producers can exercise the maximum leverage for the minimum cost through variety selection. Variety selection can mean the difference between a most rewarding season or a disappointing one. Varieties selected to meet the needs of your operation are likely to generate the most return for comparatively less investment than other varieties. The UNL Variety Testing Program provides useful information on winter wheat varieties sold in Nebraska based on field trials conducted throughout the state under various conditions. Wheat varieties tested by the program come from

  • the UNL wheat breeding program,
  • public breeding programs from surrounding states such as Colorado, Kansas, and South Dakota, and
  • the private seed industry.

The Nebraska Wheat Board financially supports the testing of wheat varieties from other public institutions.

Accessing Wheat Variety Test Results

The results of these wheat variety tests are made available through the UNL Variety Test Web site and the Fall Seed Guide, Extension publication EC 101. (The publication is available from your local Extension office.) The Fall Seed Guide also contains information from the Nebraska Crop Improvement Association on certified seed sources and private industries developing and marketing wheat seeds in Nebraska.

This information is a good tool to help you make informed decisions when selecting varieties to plant for next year’s crop. It includes variety test results for yield, seed size, test weight, and grain protein at locations tested. Other important characteristics included are relative values for maturity, winter hardiness, straw strength, coleoptiles length, and disease and insect resistance.

Table 1 shows where trials were conducted this season and the yield potential and the mean yield of the top five and top ten varieties tested at each location. This information can help you get a glance of how various varieties performed at a location of interest. If the yield reported for the top five or ten doesn’t significantly differ from the current variety (ies) you use, it may not be necessary to look further. This is if yield is the only criteria. Use the LSD (Least Significant Difference) value to evaluate whether the observed difference in performance between varieties is significant. A 5% LSD value indicates a variety would yield better than the other variety at least 95 of 100 times due to real difference.

Table 2 shows the name and yield of the top five varieties for all locations by region. Some varieties were good across location and regions. Some performed well under regular and organic field management conditions. Varieties that ranked in the top five most frequently are shown in Table 3. When everything else remained the same, varieties that maintained reasonably high yield across locations and under different management conditions may show additional quality for stable yield performance.

Tips for Selecting Wheat Varieties Suited to Your Operation

Management information for all testing sites is given in the Fall Seed Guide (EC101). Producers are encouraged to relate the information given for the sites they’re interested in and consider how varietal response might transfer to their farm condition and management.

One advantage with comparing wheat test data over some other crops is the ease of finding three- to five-year averages. Wheat varieties have a longer field life than other crops such as corn. It is appropriate also to look at variety performance at different variety trial locations even when the location characteristics are far removed. Typically we conduct more than 20 wheat variety trials across the state each year. These trials are tested under rainfed, irrigated, and organic conditions. This gives an additional option for evaluating how some cultivars respond to a change in management.

  • Look at how a variety performed over several counties and several years. Information from one season to another and from one site to another varies with seasonal weather variation and associated effects on disease and pest dynamics. Comparing several sites and years can provide a more realistic average. Emphasize varieties that perform well over years and across locations. They’ll have more stability of performance and may do well under your specific conditions.

     

  • Consider factors such as soil type, seasonal rainfall amount and distribution, temperature, and management factors such as plot history, crop rotation, previous crop, residue management, tillage etc. These will have a significant effect on varietal performance in terms of yield, grain quality, and disease reaction.
  • Emphasize varieties that showed good disease and pest ratings at locations nearest to your farm or at locations with growing conditions similar to yours.

     

  • Depending on your farm condition and management style, consider potential benefit from stalks and crop aftermath.

     

  • Look for other agronomic characteristics that fit your management and production objective such as what you want to do with stables.

     

  • Also consider secondary benefits such as feed value after the field is harvested. 

Teshome Regassa
Extension Educator

Table 1.  Location Summary for Nebraska Winter Wheat Variety Tests, 2009.

 

 

Date

Location Mean Yields (bu/a)

Region

County

Planted

 Harvested

Top Yield

Top 5

Top 10

Southeast

Lancaster

Oct. 02, 2008

July 7, 2009

72.8

68.7

65.4

 

Saunders

Sept. 26, 2008

July 9, 2009

84.9

78.2

74.6

South Central

Clay

Sept. 19, 2008

July 8, 2009

66.0

62.6

61.2

South West

Furnas

Sept. 25, 2008

July 10, 2009

88.3

84.4

81.9

 

Keith

Sept. 16, 2008

July 17, 2009

51.5

50.1

49.4

 

Lincoln

Sept. 26, 2008

July 15, 2009

78.8

76.2

75.1

 

Red Willow

Sept. 23, 2008

July 9, 2009

81.2

78.9

76.8

Panhandle

Box Butte Rain-fed

Sept.  16, 2008

July 22, 2009

96.0

91.3

88.8

 

Cheyenne Rain-fed

Sept. 15, 2008

July 24, 2009

78.1

77.0

76.3

 

Deuel Rain-fed

Sept. 16, 2008

July 22, 2009

77.4

76.0

74.9

 

Morrill Rain-fed

Sept. 11, 2008

July 18, 2009

44.5

41.3

39.9

 

Scotts Bluff Rain-fed

Sept. 15, 2008

July 18, 2009

40.5

38.2

37.2

Southwest Irrigated

Chase

Oct. 3, 2008

July 22, 2009

78.5

80.1

77.7

Northeast Irrigated

Holt

Sept. 19, 2008

July 23, 2009

86.7

83.5

81.0

Organic

Cheyenne Organic

Sept. 19, 2008

July 24, 2009

44.0

42.3

41.7

 

Saunders organic

Oct. 9, 2008

July 15,2009

94.4

89.4

87.4

 

Clay Organic

Oct. 10, 2008

July 9, 2009

66.2

64.5

62.6

 

Dixon organic

Oct. 3, 2008

July 10, 2009

53.5

53.5

51.4

Table 2. Top Five High Yielding Varieties by County and Region

 

Deuel

bu/a

Cheyenne

bu/a

Morrill

bu/a

Scotts Bluff

bu/a

Box Butte

bu/a

West Dryland

NE03490

77

Keota

78

Settler CL

45

NE03490

41

NI04421

96

Alliance

77

Settler CL

77

NE03490

42

Settler CL

38

Winterhawk

95

Camelot

75

NE03490

77

Harry

41

Infinity CL

37

Harry

91

Harry

75

NE05496

77

Goodstreak

40

Winterhawk

37

NE05549

88

Smoky Hill

75

Harry

77

Alliance

40

NI04421

37

Settler CL

87

 

Lincoln

bu/a

Keith

bu/a

Furnas

bu/a

Red Willow

bu/a

 

 

West Central

Armour

79

NE05496

52

NE01481

88

NE01481

81

 

 

Goodstreak

76

NuDakota(W)

50

NE04490

85

NE05496

80

 

 

Art

76

Alliance

50

Camelot

84

NE03490

79

 

 

Camelot

75

NI04421

50

NX04Y2107

83

Alliance

79

 

 

Alliance

75

Aspen (W)

50

Millennium

82

NE05549

76

 

 

 

Lancaster

bu/a

Saunders

bu/a

 

Clay

bu/a

 

 

Southeast

Overland

73

Hallam

85

 

South Central

Wesley

66

 

 

Millennium

72

Hitch

79

 

NX04Y2107

63

 

 

Hitch

67

NE01481

79

 

NE05430

62

 

 

Wahoo

67

NE05403

74

 

NE04490

61

 

 

Infinity CL

66

NE04490

74

 

Settler CL

61

 

 

 

Holt

bu/a

Chase

bu/a

 

 

 

 

 

 

Irrigated

NI04420

87

Aspen (W)

88

 

 

 

 

 

 

PostRock

86

Armour

79

 

 

 

 

 

 

NE05426

82

NE04490

79

 

 

 

 

 

 

Art

82

Settler CL

78

 

 

 

 

 

 

NI04436

81

NE03490

77

 

 

 

 

 

 

Table 3. Most frequent high yielding wheat varieties by management

Conventional

Organic

All Management

Freq.
Variety Freq. Variety Freq. Variety Freq. Variety
Freq.
Variety

6

NE03490

2

Art

4

NE03490

10

NE03490

2

Aspen (W)

6

Settler CL

2

Aspen (W)

2

Camelot

6

Settler CL

2

Hatcher

5

Alliance

2

Goodstreak

2

Hatcher

5

Alliance

2

Hitch

4

Harry

2

Hitch

2

NE06469

5

Camelot

2

Infinity CL

4

NE04490

2

Infinity CL

2

Pronghorn

4

Harry

2

Millennium

3

Camelot

2

Millennium

2

Wahoo

4

NE04490

2

NE05549

3

NE01481

2

NE05549

 

 

3

Goodstreak

2

NE06469

3

NE05496

2

NX04Y2107

 

 

3

NE01481

2

NX04Y2107

3

NI04421

2

Winterhawk

 

3

NE05496

2

Pronghorn

2

Armour

 

 

 

 

3

NI04421

2

Wesley

 

 

 

 

 

 

3

Wahoo

2

Winterhawk

 

 

 

 

 

 

2

Armour

 

 

 

 

 

 

 

 

2

Art