mr norman storey - teagasc · 2019-06-25 · microsoft powerpoint - mr norman storey author:...
TRANSCRIPT
Linear Scoring as a Tool forSelecting Breeding Stock
Norman Storey B.Agr.Sc.Norman Storey B.Agr.Sc.Equine Specialist AdviserEquine Specialist Adviser
What is linear scoring?
Dictionary
LinearLinear –– relating to a linerelating to a lineScoringScoring –– a system ofa system ofunits for measurementunits for measurement
This is a grey horse
These are grey horses
Shades of Grey
Grey Scale
1 2 3 4 5 6 7
Grey Scale
Grey ScoreGrey Score
Condition ScoreCondition Score
Thin Fat1 4
Look at these Front LegsLook at these Front Legs
Describe ThemDescribe Them
Good Bad
Score Them
4
umping
umping
umping
A Linear Score more accuratelyA Linear Score more accuratelydescribes the traitdescribes the trait
Linear ScoreLinear Score• Identify the traits- Conformation traits- Performance traits- Economic traits- Heritable traits
Identify TraitsIdentify TraitsBody shapeAngle of shoulderHoof shapeKneeWalk - length of strideJumping - Technique of front legScope
Linear ScoreLinear Score
Identify the traitsDescribe the traitDefine the extremitiesPresent results
Describe the traitDescribe the trait
Jump - technique of backThe measure in which theneck and back follow thearc over the jump;bascule
Define ExtremitiesDefine ExtremitiesBody shapeAngle of shoulderHoof shapeKneeWalk length of
strideTechnique of front
legScope
- Rectangular Square- Upright Sloping- Wide Narrow- Over Back
- Long Short
- Folded Stretched- Much Little
Define ExtremitiesDefine ExtremitiesBody shapeAngle of shoulderHoof shapeKneeWalk length of
strideTechnique of front
legScope
- Rectangular Square- Upright Sloping- Wide Narrow- Over Back
- Long Short
- Folded Stretched- Much Little
TraitsTraits –– two typestwo typesOptimal – average score is mostdesired
e.g. Knee, hock angle, length of back
Maximum – the higher the better or theoptimum clearly lies above the average
e.g. slope of shoulder, technique of frontleg, length of stride
The Results
Long Av Short
Length of back
Long Av Short
JumpingJumping –– technique oftechnique ofbackback
Round Av Hollow
Linear Scoring Chart
BackOverKnee
FatThinBodycondition
LightDarkColour
ResultsResults
Long Av Short
65
85123
74
87
95
78
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Traits
Linear Scoring as a Tool forSelecting Breeding Stock
Accurate description of your mareAccurate description of stallionsAids selectionImprovement in progenyBreed improvementIndustry improvement
Breed ImprovementWith more accurate assessment ofbreeding stock we can select the betterone and cull the bad onesThere is correlation between performanceand conformation but not very strong.It is much stronger between young horsetesting and competition results in later life
Linear Scoring as a Tool forSelecting Breeding Stock
Compatible with other systemsCompatible with other systemsWe must understand itWe must understand it