Objective:       

To evaluate insect resistance and agronomic performance of experimental spring wheat lines northwestern Montana.

Results:           

Despite record low rain fall, significant differences were observed for height, test weight, thousand kernel weight, and number of OWBM per spike. The average number of OWBM per spike was 0.03 and ranged from 0.0 to 0.5 OWBM per spike. Plant height averaged 20.0 inches and ranged from 19.3 inches to 21.3 inches. Test weight averaged 55.9 lb/bu and ranged from 54.3 lb/bu for 12401227 to 57.6 lb/bu for 12401424 and 12400038. Thousand kernel weights averaged 25.5 grams, ranging from 21.5 grams for 12400817 to 31.9 grams for Hank.

Summary:       

Midge pressure was low at this location. Never the less, Hank, a non-resistant variety, had the greatest number of OWBM larvae per spike in comparison to the cultivars with the Sm1 resistant gene.

 

Table 1. Materials and Methods - Sm1 Advanced Lines  
Seeding Date: 5/6/2015 Harvest Date: 8/12/2015
Julian Date: 125 Julian Date: 224
Seeding Rate: 80 lb/A Soil Type: Somers Silty Clay Loam
Previous Crop: Spring Wheat Fertilizer (PP): 23-55-30-22
Tillage: Conventional Fertilizer (TD): 1.4Zn-200N
Irrigation: None Pesticide: None
PP: pre-plant, TD: top dress   

 

Table 2. Agronomic data from the evaluation of Sm1 Advanced Spring Wheat Lines
  HT LOD YLD¹ PRO² TWT¹ TKW¹ FN OWBM
Cultivar in % bu/A % lb/bu g sec #/spk
12401424 20.3 0.0 28.3 15.6 57.6 26.0 305 0.0
12400725 20.7 0.0 28.2 15.9 54.4 26.3 486 0.0
12401218 20.3 0.0 28.1 14.7 57.1 24.5 439 0.0
12401117 19.7 0.0 27.7 14.4 56.9 26.5 445 0.0
EGAN 21.0 0.0 27.1 15.6 54.4 25.8 506 0.0
12401161 19.7 0.0 26.8 15.2 55.0 24.3 503 0.0
12401322 20.0 0.0 26.7 16.4 56.9 31.4 456 0.0
12400976 19.3 0.0 26.4 15.9 55.3 24.7 479 0.0
12401236 19.7 0.0 26.4 15.2 56.8 28.8 483 0.1
12401182 20.7 0.0 25.8 15.4 56.6 23.7 473 0.0
12400038 19.3 0.0 25.3 14.8 57.6 25.2 429 0.0
12401502 20.3 0.0 24.8 16.1 55.0 24.9 474 0.0
HANK 20.3 0.0 24.5 15.4 55.2 31.9 428 0.5
12401277 20.0 0.0 24.4 16.8 56.9 25.6 466 0.0
12401227 21.3 0.0 24.2 15.1 54.3 23.2 448 0.0
12401935 19.7 0.0 23.9 15.7 55.2 22.4 455 0.0
12400877 19.3 0.0 23.5 16.2 55.3 22.5 453 0.1
12400592 20.7 0.0 22.4 15.7 55.4 24.4 492 0.0
12400986 19.3 0.0 22.2 16.1 55.5 22.5 479 0.0
12400817 19.7 0.0 21.9 17.0 55.9 21.5 466 0.1
12401161 19.3 0.0 20.4 16.7 56.6 28.7 485 0.0
Mean 20.0 0.0 25.2 15.7 55.9 25.5 459.5 0.03
CV 3.7 0.0 15.4 6.5 2.1 8.1 17.5 424.8
LSD 1.2 ns ns ns 1.9 3.4 ns 0.2
Pr>F 0.0318 1.0000 0.4728 0.1724 0.0056 0.0001 0.6918 0.0343
HT: height, LOD: lodging, YLD: yield, PRO: protein, TWT: test weight, TKW: thousand kernel weight, FN: falling number, OWBM: orange wheat blossom midge, ns: nonsignificant        
¹adjusted to 13% moisture, ²adjusted to 12% moisture