Transcript Variety Testing and Variety Selection

Variety Testing and Variety Selection
2016 Wheat Academy
Pullman, WA
Ryan Higginbotham
[email protected]
Office:509-335-1205
Cell: 509-641-0549
Objectives
• Understand the “how” and “why”
behind the WSU Cereal Variety
Testing Program
• Be able to find and use location maps
and results files
• Understand how to use the Variety
Selection Tool
Technicians:
Vadim Jitkov
Andrew Horton
Choices
Mission
• Provide growers and industry with
independent, objective variety
performance information.
• Support breeding programs with
performance results of advanced
breeding lines.
Factors to Consider
• Accessibility of data
• Location-years
• Inclusiveness
Field Trials
• Winter: 23 Winter Locations
1. <16”
2. >16”
3. Irrigated
• Spring: Same trial at all locations
– 18 Spring Wheat Sites
– 12 Barley Sites
Entries
• Winter Wheat
– 105 Unique Entries
– 56% Public; 44% Private
• Spring Wheat
– 66 Unique Entries
– 51% Public; 49% Private
• 8,442 individual plots
Locations
<12”
Bickleton
Connell
Harrington
H. Heaven
Lind
Ritzville
St. Andrews
12”-16”
Almira
Anatone
Creston
Dusty
Endicott
Eureka
Lamont
Reardan
16”-20”
>20”
Dayton
Colton
Mayview
Fairfield
Plaza
Farmington
St. John
Palouse
Walla Walla
Pullman
Irrigated
Moses Lake
Pasco
Cereal Variety Testing Program
Falling Number End-use Quality
Rust
Screening
Hessian Fly
AGRONOMIC
DATA
VTP
FGIS
Low pH
Fusarium &
Snow mold
Wireworm
Cold Tolerance
WSU Extension Programming
• Field tours ~ 20/year
• Winter Grower Meetings
• Website:
• http://smallgrains.wsu.edu/variety
• Variety Selection Tool
• Email list
• Annual Report
• Wheat Life Articles
Seed Prep
Seed Prep
Seed Prep
Seed Prep
http://smallgrains.wsu.edu/variety
Maps
Maps
Results
• Three types of data files:
– 1) Individual location file
– 2) Yearly summary across
precipitation zone
– 3) 5-year summary across
precipitation zone
Statistics
• Coefficient of Variation (C.V.)
– Expressed as a percentage
– An indication of the amount of
variation in a trial, relative to mean
Individual= Standard Deviation
Mean
Model=Root Mean Squared Error
Mean
Statistics
• Least Significant Difference (LSD)
– Determines whether the difference
between two varieties is due to
genetics or random chance
– LSD (0.05)
• Alpha level—indicator of confidence
or the risk of differences not being
real
Application
• What pass/range is LCS Jet in the
third rep of the 2017 Pullman HRW
trial?
• Pass (column) 3, Range (row) 7
• What is the LSD for yield in the 2016
SWS trial at Palouse?
• LSD=6
• What SWW variety has the highest
3-year average across the 12-16”
precipitation zone?
• Xerpha
Quality
Quality
• Varieties Ranked by T-Score Values
• SWW T-Score
• 10% Grain Characteristics (Test Weight and Protein)
• 40% Milling Characteristics (Break Flour Yield and Milling score)
• 50% Baking Characteristics (Cookie Diameter and Water SRC)
• Compared to Check Variety
• Quality Ranking
• MD, D, A, LD, UCS
Website:
http://variety.wsu.edu
Cell: 509-641-0549
Email: [email protected]