Objective:       

To evaluate experimental winter wheat lines for stripe rust resistance and agronomic performance.

Results:           

Significant differences were observed in all response variables. Initial stripe rust rating averaged 15.6% on June 12, ranging from 0.0% for MT1564 to 78.7% for CDC Falcon. By June 26 stripe rust infection increased to an average of 27.7% ranging from 7.3 % for MT1564 to 81.3% for Decade. Heading date averaged 152 days (June 1), and spanned a 6 day period from 148 days for MT1564 to 154 days for MT1563. Plant height averaged 34.9 inches and ranged from 23.7 inches for MT 1599 to 39.7 inches for MT1561. Yield averaged 99.4 bu/A, ranging from 69.1 bu/A for Decade to 129.1 bu/A for MT1563. Protein averaged 10.8% and ranged from 9.6% for MT1561 to 12.1% for MT1566. Test weight averaged 62.7 lb/bu, ranging from 59.9 lb/bu for Decade to 64.9 lb/bu for Promontory.

Summary:       

MT1561 and MT1563 were the two highest yielding experimental varieties. Yellowstone was the highest yielding commercial variety. MT1564 and MT1569 showed the greatest resistance to stripe rust. However, nine other varieties produced statistically similar results. In conclusion winter wheat breeding efforts are producing varieties that have high levels of stripe rust resistance, are high yielding and suitable for growing in the northwest region of Montana.

 

Table 1. Materials and Methods - Winter Wheat Stripe Rust Screening   
Seeding Date: 9/29/2014 Harvest Date: 7/28/2015
Julian Date: 272 Julian Date: 209
Seeding Rate: 100 lb/A Soil Type: Creston SiL
Previous Crop: Canola Soil Test: 29-10-158
Tillage: Conventional Fertilizer: 9-40-70, 130-0-0 TD
Irrigation: None Herbicide: Huskie 11 oz/A

 

 

Table 2. Agronomic data from the winter wheat stripe rust nursery   
    6/12 6/26        
  HD SR SR HT YLD¹ PRO² TWT¹
Cultivar Julian % % in bu/A % lb/bu
MT1563 154 9.3 27.7 38.3 129.1 10.1 63.1
MT1561 153 7.7 15.7 39.7 120.2 9.6 62.4
Yellowstone 152 3.3 36.0 38.3 105.3 10.4 62.6
MT1564 148 0.0 7.3 36.0 104.7 11.4 63.7
MT1565 151 6.3 11.7 34.3 103.0 11.1 62.2
Promontory 152 3.0 14.0 36.0 101.4 10.6 64.9
MT1568 152 3.0 32.7 35.7 100.9 11.0 62.9
MT1567 151 5.0 31.0 34.0 98.4 11.2 62.6
MT1569 152 3.0 9.3 35.3 97.3 11.7 63.1
MT1562 151 7.3 20.0 34.7 96.9 11.0 63.0
MT1566 151 5.0 25.0 35.0 95.0 12.1 63.3
MT1599 152 10.0 20.3 23.7 91.7 10.2 61.3
CDC Falcon 153 78.7 73.0 32.7 78.6 10.3 62.2
Decade 152 77.3 81.3 35.3 69.1 10.2 59.9
Mean 152 15.6 28.9 34.9 99.4 10.8 62.7
CV 0.6 38.4 51.4 4.8 8.1 4.0 0.5
LSD 1.6 10.1 25.0 2.8 13.5 0.7 0.6
Pr>F 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001
HD: heading, SR: stripe rust, HT: height, YLD: yield, PRO: protein, TWT: test weight       
¹adjusted to 13% moisture, ²adjusted to 12% moisture