Phil Bruckner and Jim Berg, Winter Wheat Breeding Program
Updated 12/2018

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SY Clearstone 2CL is a 2-gene CLEARFIELD hard red winter wheat developev by Montana Agricultural Experiemnt Station in 2012 and licensed exclusively to Syngenta Seeds. SY Clearstone 2CL wheat is very similar to Yellowstone. It is a medium maturing, medium tall, white chaffed wheat with average winter hardiness. It is a high yielding wheat (Tables 1,2) with average test weight and protein (Table 3). SY Clearstone 2CL is resistant to stripe rust and has moderate resistance to stem rust, the latter an improvement over Yellowstone. SY Clearstone 2CL is a medium PPO variety with average mill and above average bake properties (Table 4). 
PVP Title V has been issued (Certificate #201300357). Additionally, the CLEARFIELD genes are patented.

 

Table 1. Yield of SY Clearstone 2CL vs. a Set of Varieties (2012-2018)1/

Variety
Districts
All Locations
1
2
3
4
5
5
6
Kalispell
Bozeman
Huntley2/
Moccasin3/
Conrad4/
Havre5/
Sidney & Williston
Location years 6 6 36 31 27 19 9 134
Yellowstone
 111.4 99.8 72.4 59.3 57.8 57.4 59.3 70.0
Northern
 113.1 97.0 72.2 58.6 73.7 57.5 55.6 69.1
SY Clearstone 2CL
 113.2 97.7 70.7 59.4 73.9 56.0 52.1 68.5
Decade
 50.1 81.5 69.2 56.6 69.8 52.4 53.0 62.6
LSD (0.05) 19.0 11.6 ns ns 2.8 2.6 4.3 2.1
  • bold-italics indicates highest value within a column
  • bold indicates values equal to highest variety within a column based on Fisher's Protected LSD (p = 0.05)
  • ns = non-significant
  • 1/ 2012-1016, 2018 intrastate and 2013-2018 off station tests
  • 2/ includes data from Forsyth, Fort Smith, Hardin area, Hysham, Lodge Grass, Molt Rapelje
  • 3/ includes data from Belt, Denton, Geraldine, Highwood, Winifred
  • 4/ includes data from Choteau, The Knees, Shelby
  • 5/ includes data from Fort Benton, Loma, Turner

 

Table 2. Yield of SY Clearstone 2CL vs. a set of CLEARFIELD Varieties (2015-2018) Intrastate Tests

Variety
Districts
All Locations
1
2
3
4
5
5
6
Kalispell
Bozeman
Huntley
Moccasin
Conrad
Havre1/
Sidney & Williston
Location years 3 4 3 4 4 7 6 31
SY Clearston 2CL
 112.9 103.5 111.8 63.8 81.8 64.3 52.1 78.5
WB4623CLP
 116.1 99.9 105.7 54.8 75.7 57.3 36.2 71.1
Brawl CL Plus
 77.3 82.7 112.9 58.7 81.2 61.2 46.3 69.9
LSD (0.05) ns 16.2 ns 5.3 ns 5.1 12.0 5.9
  • bold-italics indicates highest value within a column
  • bold indicates values equal to highest variety within a column based on Fisher's Protected LSD (p = 0.05)
  • ns = non-significant
  • 1/ includes Fort Benton

 

Table 3. Agronomic Characteristics of SY Clearstone 2CL vs. a Set of Recomended Varieties (2012-2018)1/

Variety
Test weight (lb/bu)
Winter survival (%)
Heading date
Plant heaigh (in)
Lodging (%)
Protein (%)
Sawfly cutting (%)
Stripe rust (%)
Coleoptile length (in)
Julian
Calendar
Location years 134 6 58   132 22 131 18 8 2
Decade
 59.6 53 159.4 8-Jun 31.3 23 12.9 28 71 3.2
Northern
 59.7 41 162.6 12-Jun 31.3 22 12.9 29 22 2.5
SY Clearstone 2CL
 59.1 36 161.5 11-Jun 33.7 28 12.5 38 34 3.0
Yellowstone
 59.5 48 161.7 11-Jun 32.9 24 12.5 35 33 2.7
LSD (0.05) 0.3 10 0.4   0.3 ns 0.1 7 14 0.2
  • bold-italics indicates highest value within a column
  • bold indicates values equal to highest variety within a column based on Fisher's Protected LSD (p = 0.05)
  • ns = non-significant
  • 1/ 2012-2016, 2018 intrastate and 2013-2018 off station tests

 

Table 4. Mill and Bake Characteristics of SY Clearstone 2CL vs. a Set of varieties (2012-2016)

Variety
PPO1/
Kernel hardness
Flour
Mixograph
Baking
Yield (%)
Protein (%)
Ash (%)
Tolerance (1-6)
Mix time (min)
Absorption (%)
Mix time (min)
Absorption (%)
Volume (cc)
Location years 20 20 20 20 20 20 20 20 20 20 20
Decade
 0.285 75.7 68.6 11.5 0.42 4.6 7.9 64.9 19.2 75.3 1044
Northern
 0.104 86.2 69.7 11.8 0.45 3.5 4.1 62.4 6.2 72.2 1076
SY Clearstone 2CL
 0.300 77.8 67.8 11.1 0.43 4.0 6.1 62.2 9.9 72.6 1038
Yellowstone
 0.217 78.9 68.9 11.3 0.43 4.4 8.3 64.2 16.0 75.0 1052
LSD (0.05) 0.032 2.4 0.7 0.3 0.01 0.4 0.7 1.2 2.0 1.2 ns
  • bold-italics indicates highest value within a column
  • bold indicates values equal to highest variety within a column based on Fisher's Protected LSD (p = 0.05)
  • ns = non-significant
  • 1/ polyphenol oxidase, low is best for noodles