|
2003 Colorado Winter Wheat Variety Performance Trial Results Performance trial results help Colorado wheat producers make better variety decisions. Colorado State University, with the support and cooperation of the Colorado wheat industry, conducts annual dryland (UVPT) and irrigated (IVPT) variety performance trials to obtain unbiased and reliable information for Colorado wheat producers to make better wheat variety decisions. Good variety decisions can return millions of dollars to Colorado wheat producers. The dryland UVPT was comprised of 66 entries grown at 10 locations. Of the 66 entries in this trial, approximately half were named varieties and the other half were experimental lines. In addition to CSU varieties and experimental lines, the trial included public varieties from Nebraska, Oklahoma, Kansas, and Texas, and private varieties from Cargill-Goertzen and AgriPro. A randomized complete block design with three replicates was used in all trials. Dryland trials were seeded at 600,000 seeds per acre, planted in 9 inch-spaced rows at Akron, Burlington, and Julesburg and 12 inch-spaced rows at the other locations. The irrigated IVPT was conducted at Rocky Ford, Ovid, and Fort Collins. The irrigated trials are managed for maximum yield and are seeded at 1.2 million seeds per acre with adequate fertilization to obtain or exceed 100 bushels per acre. The Ovid and Fort Collins trials were grown under sprinkler irrigation and the Rocky Ford trial was furrow-irrigated. All three irrigated trials provided excellent results. The Ovid trial was planted late to reflect results that might be obtained by planting winter wheat after harvesting corn in northeastern Colorado. Planting conditions in the fall of 2002, following the severe drought, ranged from adequate to excellent except at the Bennett and Genoa locations where planting conditions were extremely dry. The trial at Bennett partially emerged after the late March (2003) snowstorm but resulting stands were highly variable. Emergence at Genoa was uniform but only about half the desired level. In spite of generally good emergence and top soil moisture conditions at the other locations, poor sub-soil moisture levels throughout eastern Colorado were prevalent. Adequate fall and winter precipitation was followed by a dry spring and moderate drought stress conditions at Walsh, Lamar, Sheridan Lake, Cheyenne Wells, Burlington, Genoa, and Orchard. The spring drought was aggravated by limited sub-soil moisture. Russian wheat aphid pressure was higher this year than in recent years, especially in east-central and southeastern Colorado. A new Russian wheat aphid biotype was identified that overcomes the resistance in all RWA-resistant varieties released to date. Found in several places in eastern Colorado, it is feared that this new biotype (denoted as “biotype B”) will spread throughout the region and replace the original RWA biotype (denoted as “biotype A”). Russian wheat aphid damage was observed at Walsh, Bennett, and Fort Collins with sporadic infestations observed at several other locations. Wheat steak mosaic virus and high plains disease were not observed at any locations and slight barley yellow dwarf virus symptoms were only observed at one location. Stripe rust, which had been so severe in 2001, was observed at the dryland trials at Julesburg, Akron, Burlington, Genoa, and Orchard and the irrigated trials at Fort Collins and Ovid. Infestation levels at these locations were relatively light except at Akron (dryland) and Ovid (irrigated) where yields of some highly susceptible entries were reduced significantly. Leaf rust was observed at very low levels at some locations. Temperatures were quite moderate statewide throughout May and June except one brief high temperature event in late May. High temperatures began in early July and affected some of the more northern trials during the last two weeks of grain filling. Low grain protein content, indicative of low soil nitrogen levels, were observed in some parts of the state that had above average yields. Hail played a major role in reducing yields in 2003. Trials at Walsh,
Lamar, Sheridan Lake, Cheyenne Wells, Genoa, and Orchard were damaged,
to varying degrees, by early and late June hail events. Several locations
received hail twice. These hail events led to more severe shattering
than in previous years. All locations were harvested in 2003 but the
UVPT summary table of results only includes six of the ten locations
as emergence, drought, and hail conditions did not permit reliable
variety yield comparisons at Bennett, Lamar, Sheridan Lake, and Genoa. http://www.colostate.edu/Depts/SoilCrop/extension/CropVar/wheat1.html http://wheat.colostate.edu/vpt.html |
| Location |
2003 |
|||||||||||||||
| Akron |
Burlington |
Cheyenne
Wells |
Julesburg |
Orchard |
Walsh |
Averages |
||||||||||
| Variety1 | Yield
|
Test
Wt
|
Yield
|
Test
Wt
|
Yield
|
Test
Wt
|
Yield
|
Test
Wt
|
Yield
|
Test
Wt
|
Yield
|
Test
Wt
|
Yield
|
% of Trial
Average
|
Test
Wt
|
Plant Ht |
bu/ac
|
lb/bu
|
bu/ac
|
lb/bu
|
bu/ac
|
lb/bu
|
bu/ac
|
lb/bu
|
bu/ac
|
lb/bu
|
bu/ac
|
lb/bu
|
bu/ac
|
%
|
lb/bu
|
in | |
| Yuma | 93.4
|
59.5
|
56.0
|
56.9
|
42.5
|
59.4
|
75.9
|
59.0
|
33.0
|
61.4
|
17.2
|
59.7
|
53.0
|
109
|
59.3
|
28 |
| Trego | 92.8
|
61.0
|
48.3
|
59.7
|
41.9
|
60.3
|
74.0
|
60.7
|
35.3
|
63.3
|
24.9
|
60.5
|
52.9
|
109
|
60.9
|
26 |
| Above | 93.1
|
59.6
|
46.0
|
57.0
|
41.0
|
58.8
|
72.4
|
59.1
|
39.2
|
59.1
|
25.0
|
59.9
|
52.8
|
109
|
58.9
|
27 |
| TAM 111 | 101.3
|
60.8
|
46.5
|
57.8
|
41.4
|
61.1
|
72.6
|
59.1
|
35.4
|
62.8
|
18.7
|
60.2
|
52.6
|
109
|
60.3
|
28 |
| Ankor | 90.4
|
58.1
|
45.2
|
57.5
|
41.8
|
58.6
|
73.5
|
58.4
|
37.3
|
61.4
|
22.8
|
60.2
|
51.8
|
107
|
59.0
|
29 |
| Enhancer | 94.9
|
60.2
|
48.0
|
55.8
|
42.8
|
60.5
|
76.8
|
58.2
|
32.4
|
61.5
|
14.0
|
59.2
|
51.5
|
106
|
59.2
|
31 |
| Alliance | 92.2
|
59.5
|
42.7
|
56.6
|
39.3
|
60.9
|
74.2
|
58.8
|
34.4
|
61.9
|
20.4
|
58.9
|
50.5
|
104
|
59.4
|
27 |
| Avalanche | 89.9
|
61.0
|
47.7
|
58.7
|
42.3
|
60.5
|
65.4
|
60.7
|
34.4
|
61.8
|
22.9
|
61.1
|
50.4
|
104
|
60.6
|
28 |
| Yumar | 91.0
|
60.2
|
50.2
|
58.1
|
38.7
|
58.7
|
77.0
|
59.6
|
29.1
|
61.2
|
16.0
|
60.5
|
50.3
|
104
|
59.7
|
28 |
| Prairie Red | 88.5
|
59.2
|
48.8
|
56.9
|
40.7
|
57.2
|
68.2
|
59.0
|
32.3
|
61.4
|
22.6
|
59.2
|
50.2
|
104
|
58.8
|
28 |
| TAM 110 | 87.2
|
58.1
|
44.3
|
56.6
|
41.0
|
58.0
|
71.9
|
59.5
|
33.8
|
60.7
|
21.6
|
59.5
|
49.9
|
103
|
58.7
|
27 |
| Akron | 88.4
|
59.4
|
46.3
|
57.7
|
42.6
|
58.8
|
67.5
|
58.6
|
33.4
|
60.5
|
19.5
|
59.3
|
49.6
|
103
|
59.0
|
28 |
| Stanton | 92.2
|
60.3
|
41.7
|
58.4
|
39.7
|
59.3
|
69.9
|
59.0
|
31.7
|
62.1
|
21.0
|
60.5
|
49.4
|
102
|
59.9
|
29 |
| AP502 CL | 87.6
|
59.4
|
43.5
|
56.9
|
39.2
|
58.7
|
71.4
|
59.4
|
31.1
|
60.4
|
20.6
|
58.6
|
48.9
|
101
|
58.9
|
28 |
| Ok101 | 88.4
|
60.0
|
46.6
|
56.9
|
37.8
|
59.1
|
69.5
|
58.9
|
33.1
|
61.6
|
17.1
|
60.2
|
48.8
|
101
|
59.4
|
29 |
| Cisco | 88.9
|
60.5
|
48.3
|
56.6
|
37.5
|
57.9
|
57.2
|
59.6
|
32.5
|
60.5
|
22.4
|
60.4
|
47.8
|
99
|
59.2
|
28 |
| Lakin | 81.5
|
57.9
|
48.2
|
57.2
|
38.8
|
60.3
|
71.0
|
58.0
|
34.1
|
62.0
|
13.2
|
59.9
|
47.8
|
99
|
59.2
|
28 |
| 2137 | 85.7
|
59.3
|
45.8
|
58.0
|
38.0
|
59.0
|
71.5
|
59.4
|
30.2
|
61.3
|
13.1
|
59.1
|
47.4
|
98
|
59.4
|
27 |
| Ok102 | 84.7
|
60.5
|
44.8
|
57.6
|
39.8
|
58.5
|
64.1
|
59.5
|
30.7
|
61.9
|
19.2
|
60.3
|
47.2
|
98
|
59.7
|
27 |
| Halt | 85.4
|
58.3
|
41.7
|
56.0
|
33.1
|
59.6
|
71.5
|
58.0
|
30.5
|
61.0
|
17.8
|
59.1
|
46.7
|
96
|
58.7
|
27 |
| Jagalene | 90.6
|
61.4
|
41.7
|
57.6
|
37.9
|
58.1
|
67.3
|
59.6
|
26.7
|
63.0
|
15.4
|
61.0
|
46.6
|
96
|
60.1
|
27 |
| Jagger | 93.2
|
60.6
|
44.2
|
56.0
|
33.4
|
58.8
|
62.2
|
58.9
|
30.8
|
60.9
|
12.4
|
60.0
|
46.0
|
95
|
59.2
|
29 |
| Kalvesta | 87.8
|
59.8
|
40.8
|
56.2
|
35.2
|
59.7
|
66.0
|
58.6
|
31.4
|
61.6
|
14.1
|
59.5
|
45.9
|
95
|
59.2
|
27 |
| Prowers 99 | 83.3
|
61.4
|
40.0
|
58.0
|
40.2
|
61.5
|
62.2
|
60.5
|
31.4
|
62.2
|
15.2
|
60.4
|
45.4
|
94
|
60.7
|
32 |
| G980091-1 | 85.1
|
59.7
|
39.7
|
56.4
|
28.7
|
58.8
|
66.5
|
58.3
|
33.0
|
60.6
|
10.8
|
59.4
|
44.0
|
91
|
58.9
|
26 |
| Venango | 81.2
|
59.7
|
33.4
|
55.8
|
27.9
|
59.0
|
68.6
|
59.1
|
29.3
|
*
|
6.0
|
60.2
|
41.1
|
85
|
58.8
|
28 |
| Thunderbolt | 78.0
|
61.2
|
35.3
|
58.2
|
26.5
|
59.8
|
61.0
|
59.9
|
28.1
|
62.5
|
8.8
|
61.0
|
39.6
|
82
|
60.4
|
27 |
| Average | 88.8
|
59.9
|
44.7
|
57.2
|
38.1
|
59.3
|
69.2
|
59.2
|
32.4
|
61.5
|
17.5
|
59.9
|
48.4
|
100
|
59.5
|
28 |
| LSD(0.30) | 4.6
|
2.7
|
3.9
|
3.1
|
2.8
|
2.4
|
||||||||||
| 1Varieties in table ranked by the average yield over six locations in 2003.
*Inadequate grain for test weight determination. |
||||||||||||||||
| Averages | |||||||
| Variety1 | 3-Yr | 2-Yr | 2003 | 2002 | 2001 | 3-Yr | 2-Yr |
| --------------------Yield (bu/ac)-------------------- | ----Twt (lb/bu)---- | ||||||
| Trego (HWW) | 47.2 | 46.7 (3) | 52.9 | 34.3 | 42.5 | 59.8 | 60.8 |
| Enhancer | 45.0 | 44.4 | 51.5 | 30.3 | 40.5 | 57.8 | 58.9 |
| Stanton | 45.0 | 43.8 | 49.4 | 32.6 | 41.1 | 58.4 | 59.9 |
| Above (CL)* | 44.5 | 46.7 (2) | 52.8 | 34.5 | 37.3 | 57.4 | 59.0 |
| Yuma | 44.3 | 45.3 (5) | 53.0 | 30.0 | 38.3 | 57.7 | 59.2 |
| Alliance | 44.3 | 44.5 | 50.5 | 32.5 | 39.1 | 57.8 | 59.2 |
| Ankor | 43.8 | 45.8 (4) | 51.8 | 33.7 | 37.0 | 57.6 | 58.7 |
| Jagger | 43.8 | 41.3 | 46.0 | 31.7 | 41.5 | 58.1 | 59.2 |
| Akron | 43.7 | 44.1 | 49.6 | 33.2 | 38.4 | 57.7 | 58.8 |
| Prairie Red | 43.0 | 45.0 | 50.2 | 34.6 | 36.2 | 57.5 | 58.8 |
| Avalanche (HWW) | 42.8 | 44.1 | 50.4 | 31.6 | 36.7 | 59.2 | 60.6 |
| Halt | 42.8 | 42.7 | 46.7 | 34.7 | 38.1 | 57.4 | 58.6 |
| Yumar | 42.4 | 43.8 | 50.3 | 30.8 | 36.2 | 58.3 | 59.3 |
| AP502 CL* | 41.6 | 43.5 | 48.9 | 32.7 | 35.1 | 56.9 | 58.6 |
| TAM 110 | 41.2 | 44.1 | 49.9 | 32.3 | 33.7 | 57.0 | 58.8 |
| Prowers 99 | 41.1 | 40.9 | 45.4 | 31.8 | 36.8 | 59.5 | 60.3 |
| Lakin (HWW) | 40.8 | 43.2 | 47.8 | 33.9 | 33.9 | 58.3 | 59.3 |
| 2137 | 40.2 | 42.3 | 47.4 | 32.2 | 33.6 | 57.5 | 59.0 |
| Venango | 37.3 | 37.3 | 41.1 | 29.9 | 33.1 | 58.5 | 58.9 |
| TAM 111 | --- | 46.8 (1) | 52.6 | 35.0 | --- | --- | 59.9 |
| Jagalene | --- | 43.0 | 46.6 | 35.7 | --- | --- | 60.2 |
| Ok101 | --- | 42.8 | 48.8 | 30.9 | --- | --- | 59.2 |
| Cisco | --- | 42.5 | 47.8 | 31.7 | --- | --- | 59.1 |
| Thunderbolt | --- | 36.7 | 39.6 | 30.8 | --- | --- | 60.2 |
| 1Varieties in table ranked based
on 3-Yr average yields. 1…………5Variety rank based on 2-Yr average yields. *CL - CLEARFIELD* wheat variety. HWW - Hard white winter wheat variety. |
|||||||
Colorado winter wheat Irrigated Variety Performance Trial summary for 2003.
| Location |
2003 |
|||||||||||
| Fort Collins |
Ovid |
Rocky Ford |
Averages |
|||||||||
| Variety1 | Yield | Test Wt | Protein Content2 | Yield | Test Wt | Yield | Test Wt | Yield | % of Trial Average | Test Wt | Plant Ht | Lodging3 |
| bu/ac | lb/bu | % | bu/ac | lb/bu | bu/ac | lb/bu | bu/ac | % | lb/bu | in | 1-9 | |
| Jagalene | 128.0 | 60.4 | 14.2 | 100.6 | 57.6 | 116.8 | 59.3 | 115.1 | 116 | 59.1 | 37 | 4 |
| Prairie Red | 124.7 | 59.1 | 13.5 | 81.7 | 53.2 | 119.1 | 58.4 | 108.5 | 109 | 56.9 | 38 | 2 |
| Wesley | 113.1 | 57.6 | 15.3 | 91.7 | 58.2 | 116.6 | 60.0 | 107.1 | 108 | 58.6 | 35 | 1 |
| Yuma | 120.2 | 58.2 | 13.9 | 97.5 | 58.3 | 103.5 | 59.4 | 107.1 | 108 | 58.6 | 38 | 2 |
| G980091-1 | 116.8 | 58.4 | 14.1 | 92.4 | 56.0 | 106.7 | 61.6 | 105.3 | 106 | 58.7 | 35 | 3 |
| Cisco | 119.9 | 60.6 | 14.2 | 88.3 | 57.9 | 101.0 | 58.4 | 103.1 | 104 | 59.0 | 38 | 3 |
| Antelope | 107.1 | 58.0 | 14.6 | 90.8 | 56.8 | 106.5 | 61.5 | 101.5 | 102 | 58.7 | 39 | 4 |
| Ok101 | 115.2 | 58.9 | 13.3 | 79.8 | 53.1 | 107.7 | 59.4 | 100.9 | 101 | 57.1 | 39 | 3 |
| G980122 | 117.4 | 58.9 | 15.6 | 78.3 | 54.4 | 105.6 | 60.5 | 100.4 | 101 | 57.9 | 38 | 2 |
| Dumas | 126.4 | 60.7 | 12.9 | 78.5 | 53.2 | 96.1 | 61.3 | 100.3 | 101 | 58.4 | 37 | 2 |
| Platte | 121.5 | 61.5 | 13.8 | 53.2 | 47.5 | 121.8 | 60.6 | 98.8 | 99 | 56.5 | 37 | 2 |
| Kalvesta | 116.8 | 59.3 | 14.7 | 74.7 | 52.9 | 101.3 | 60.7 | 97.6 | 98 | 57.6 | 39 | 2 |
| 2137 | 121.4 | 59.1 | 14.5 | 76.0 | 54.3 | 94.9 | 60.1 | 97.4 | 98 | 57.8 | 39 | 1 |
| Ok102 | 113.8 | 58.9 | 15.1 | 73.9 | 54.0 | 101.0 | 60.4 | 96.2 | 97 | 57.8 | 38 | 1 |
| Ankor | 109.0 | 57.5 | 13.1 | 65.5 | 53.4 | 108.5 | 61.1 | 94.3 | 95 | 57.3 | 40 | 2 |
| Venango | 116.1 | 59.3 | 14.3 | 82.1 | 58.2 | 69.9 | 62.2 | 89.4 | 90 | 59.9 | 38 | 2 |
| Arrowsmith | 86.4 | 54.1 | 15.2 | 81.9 | 55.6 | 98.6 | 61.5 | 89.0 | 89 | 57.1 | 43 | 4 |
| Nuplains | 92.7 | 60.0 | 14.1 | 51.6 | 52.8 | 98.6 | 60.8 | 81.0 | 81 | 57.9 | 37 | 2 |
| Average | 114.8 | 58.9 | 14.2 | 79.9 | 54.9 | 104.1 | 60.4 | 99.6 | 100 | 58.1 | 38 | 2 |
| Minimum | 12.9 | |||||||||||
| Maximum | 15.6 | |||||||||||
| LSD(0.30) | 7.6 | 9.4 | 6.8 | |||||||||
| 1Varieties in table ranked
by the average yield over three locations in 2003. 2Protein contents adjusted to 12% moisture basis. 3Rating scale 1-9, with 1 = no lodging and 9 = completely lodged. |
||||||||||||
Colorado winter wheat 3-Yr and 2-Yr Irrigated Variety Performance Trial summary.
| Averages | |||||||
| Variety1 | 3-Yr | 2-Yr | 2003 | 2002 | 2001 | 3-Yr | 2-Yr |
| ---------------------Yield (bu/ac)--------------------- | ----Twt (lb/bu)---- | ||||||
| Wesley | 102.8 | 100.6 (4) | 107.1 | 91.0 | 108.2 | 59.8 | 58.9 |
| Antelope (HWW) | 99.7 | 95.6 | 101.5 | 86.9 | 109.7 | 60.1 | 58.8 |
| Yuma | 98.9 | 101.3 (3) | 107.1 | 92.6 | 92.9 | 59.4 | 58.3 |
| Prairie Red | 98.5 | 103.1 (2) | 108.5 | 94.9 | 87.0 | 58.5 | 57.5 |
| 2137 | 88.2 | 90.4 | 97.4 | 79.8 | 82.9 | 58.9 | 58.0 |
| Venango | 85.8 | 83.9 | 89.4 | 75.8 | 90.4 | 60.8 | 60.0 |
| Nuplains (HWW) | 83.2 | 84.4 | 81.0 | 89.5 | 80.3 | 59.7 | 58.8 |
| Jagalene | --- | 106.1 (1) | 115.1 | 92.5 | --- | --- | 59.4 |
| Platte (HWW) | --- | 97.6 (5) | 98.8 | 95.8 | --- | --- | 58.0 |
| Ok101 | --- | 97.4 | 100.9 | 92.2 | --- | --- | 57.2 |
| Dumas | --- | 93.9 | 100.3 | 84.3 | --- | --- | 59.6 |
| Ankor | --- | 92.1 | 94.3 | 88.8 | --- | --- | 56.7 |
| 1Varieties in table ranked
based on 3-Yr average yields. 1…………5Variety rank based on 2-Yr average yields. HWW - Hard white winter wheat variety. |
|||||||
|
|