Recording of conformation, gaits and jumping in young SWB horses. Lina Jönsson Department of animal breeding and genetics, SLU

Transcription

1 Recording of conformation, gaits and jumping in young SWB horses Lina Jönsson Department of animal breeding and genetics, SLU

2 Recording approach 1. Descriptive remarks (/1) 2. Evaluation of trait accordance to breeding goal (total scores 1 1) Protocol remark recording for standardised nomenclature and as support for judges and information to horse owners

3 Conformation (4 yrs) Type: Size Format Heavyness Harmony Head-neck-body Withers Shoulder angle Back Croup Chest Leg conformation General (joints, pasterns, hoofs) Forelimbs Hindlimbs Correctness, walk Stride length Rhythm Suppleness Correcness, trot Heavy/lightness Stride length Rhythm Suppleness

4 Gaits (4 year olds) Under rider: Walk Stride length Rhythm Suppleness Tension Impulsion Trot Stride length Rhythm Balance Suppleness Impulsion Canter Stride length Rhythm Balance Energy Suppleness General impression Forward willingness Cooperativeness Potential to develop

5 Jumping (4 year olds) Under rider or during free jumping: Technique and capacity Capacity Rhythm Balance Ability to find fence distance Forward/jumping willingness Back activity Front leg technique Hind leg technique Reactioness Ability to learn from mistakes Impulsion/strength Temp. & general impression Attentiveness Willingness to cooperate Trust Mind (unafraid, calm, energetic) Tension

6 Joint protocol (3 year olds) At hand: Forward willingness Cooperative Natural balance Type Head-neck-body Legs Walk Trot Canter Technique and ability Temperament and general impression

7 Distrubution of notes Type negative notes positive notes Head neck body n=3 n=81 n=284 n=33 n=732 n=4 n=1 n=2 n=2 n=24 n=424 n=3 Correct. of movements, walk Correct. of movements, trot n=2 n=48 n=771 n=3831 n=3123 n=49 n= n=1 n=69 n=18 n=431 n=187 n=381 n=18

8 Distrubution of notes, cont. Extremities positive notes, general positive notes, hindlimbs positive notes, forelimbs negative notes general negative notes, hindlimbs negative notes, forelimbs n=1 n=2 n=62 n=44 n=31 n=47

9 Forelimbs Observed heritability (/1) Underlying heritability % Toe in Narrow at the base Toe out bench knee Paddle (arch outwards) "Wing" (arch inwards) Narrow at the knee Buck knee Calf knee Outward rotated

10 Forelimbs h 2 obs H 2 underl Toe in Toe out Toe in-normal-toe out.2.3 Correlation (rg); -.9. Paddle arch outwards Winging" arch inwards Paddle -normal- winging.9.2 Correlation (rg); Buck knee Calf knee Buck knee-normal-calf knee.2.1 Correlation (rg);

11 Hindlimbs Observed heritability (/1) Underlying heritability 8 % Wide at the hocks Small hock angle (sickle hocked) Narrow at the base Large hock angle (straight in hock) Toe out Narrow at the hocks Wide at the base Delicate under hock

12 Hindlimbs h 2 obs H 2 underl Wide at hocks Narrow at hocks Wide-normal-narrow hocks.9.2 Correlation (rg); Small hock angle (sickle hocked) Large hock angle (straight) Sickle hocked-normal-straight.16.2 Correlation (rg); Narrow at the base Wide at the base Narrow-normal-wide at base.7.2 Correlation (rg); -.6.3

13 Joints, pasterns & hoofs % Delicate joints Heavy joints Long cannon bones Weak pasterns Stiff pasterns Long pasterns Flat hoofs Narrow hoofs Small hoofs h 2 obs H 2 underl Weak pasterns Stiff pasterns Weak-normal-stiff pasterns.9.2 Correlation (rg); Delicate joints Heavy joints Delicate-normal-heavy joints..3 Correlation (rg);

14 Type % Head neck body % 2 1 1

15 Type & head neck body h 2 obs H 2 underl Large type Small type Large-normal-small type.24.3 Correlation (rg); Long lines Short lines Long-normal-short lines.16.2 Correlation (rg); Long back Short back Long-normal-short back.1.4 Correlation (rg); Well positioned shoulder Sloping shoulder Well positioned-normal-sloping..1 Correlation (rg);