Linear Ben Krahn Oregon State University Dairy Research Center.

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Presentation transcript:

Linear Ben Krahn Oregon State University Dairy Research Center

Linear Type Evaluation Frame-15% Dairy Character-20% Body Capacity-10% Feet and Legs-15% Udder-40% Purebred Dairy Cattle Association

Linear Type Evaluation 50 point scale Comparing against ideal Objective comparison Breed Classification

Frame 15% Rump Stature Front end Back Breed Characteristics

Rump Width between pins Slight slope from hips to pins Thurls wide and centered between pins

Rump Width 5-Extremely Narrow2.5” 25-Intermediate4.5” 45-Extremely Wide 6.5”

Rump Angle 5-High Pins1.5” 25-Slight Slope1.5” 45-Extreme Sloped4.5”

Stature Measured at the point of withers Height at point of withers and pins should be proportionate Varies by breed

Breed Holstein Jersey B. Swiss Guernsey Ayrshire Shorthorn Stature in Inches by Breed Linear Score

Strength 5-Extremely Narrow 25-Intermediate 45-Extremely Strong and Wide

Dairy Character-20% 5-Extremely Tight 25-Intermediate 45-Extrememly Open

Body Capacity-10% 5-Extremely Shallow 25-Intermediate 45-Extremely Deep

Feet and Legs-15% Foot angle-Pasterns Rear legs –Rear view –Side view

Foot Angle 5-Extremely Low 25-Intermediate 45 degrees 45-Extremely Steep

Rear Legs-Rear View 5-Extreme Hock-In 25-Slight Hock-In 45-Tracks Extremely Straight

Rear Legs-Side View 5-Extremely Posty 25-Intermediate 45-Extremely Sickled

Udder-40% Udder Depth Front Teat Placement Rear Udder –Height –Width Fore Udder Teat Length Udder Balance and Texture

Udder Depth 5-Extremely Deep-2” 25-Intermediate2” 45-Extremely Shallow6”

Front Teat Placement 5-Extremely Wide 25-Centrally Placed 45-Extremely Close

Rear Udder Height 5-Extremely Low13.3” 25-Intermediate10.5” 45-Extremely High8.7”

Rear Udder Width 5-Extremely Narrow5” 25-Intermediate5.5” 45-Extremely Wide7.5”

Udder Cleft 5-Extremely Weak flat1” 25-Intermediate1.25” 45-Extremely Strong2.5”

Fore Udder 5-Extremely Loose 25-Intermediate 45-Extremely Strong

Teat Length 5-Extremely Short1.25” 25-Intermediate2.25” 45-Extremely Long3.25”

Udder Tilt 5-Extreme Rearward Tilt2.5” 25-Nearly Level 45-Extreme Forward Tilt1.5”

References Purina Mills – Holstein Association – American Jersey Association – Hoards Dairyman – World Holstein Friesian Federation –