Bull

VJ Rockit

NTM 25

Herdbook number: DNK 305193 Birthdate: 26 Dec 2021

Breed Jersey

Sire VJ Ribe

MGS VJ Nibali

Proven/Genomic Genomic

Beta casein A2A2

Kappa casein BB

Polled Horned

aAa 516

Recommended for

Milk Calving Ease Hoof health

Link to NAV Bull Data

NTM guide

Production & Efficiency

Trait Index 80 100 120
Production 121
Milk kg 107
Fat, kg 119
Fat, % 105
Protein kg 117
Protein % 109
Persistency 85
Growth 109
Saved feed 111
Maintenance efficiency 95

NAV proof run date: 12-08-2025 Reliability 87 % Number of daughters: 0

Expected Progeny Difference

Trait Index Bull effect Average
Milk kg, 305 days 107 200.5 7751
Fat kg, 305 days 119 20.0 460
Fat %, 305 days 105 0.13 6.0
Protein kg, 305 days 117 14.5 335
Protein %, 305 days 109 0.08 4.3

NAV proof run date: 12-08-2025 Reliability 87 % Number of daughters: 0

Health & Reproduction

Trait Index 80 100 120
Daughter fertility 97
Interval from calving to first insemination (cows) 101
Interval from first to last insemination (heifers) 108
Interval from first to last insemination (cows) 95
Number of inseminations (heifers) 102
Number of inseminations (cows) 94
Calving sire 110
Calving maternal 102
Udder health 110
General health 100
Longevity 100
Hoof health 112
Sole Ulcer 113
Sole Hemorrhage 104
Heel Horn Erosion 94
Digital dermatitis + Interdigital Dermatitis 108
Verrucose dermatitis + Interdigital Hyperplasia 112
Double sole + White line separation 113
Cork screw claw 92
Youngstock survival 107

NAV proof run date: 12-08-2025 Reliability 73 % Number of daughters: 0

Trait Index 80 100 120
Milkability 105
Temperament 100

NAV proof run date: 12-08-2025 Reliability 53 % Number of daughters: 0

Trait Index 80 100 120
Frame 88
Stature 107 Short Tall
Body depth 96 Shallow Deep
Chest width 98 Narrow Wide
Rib structure 106 Coarse Angular
Top line 96 Weak Strong
Rump width 98 Narrow pins Wide pins
Rump angle 105 High pins Low pins
Feet & legs 91
Rear legs, side view 109 Straight Sickled
Rear legs, back rear view 94 Toes out Parallel, bow-legged
Foot angle 97 Low Steep
Bone quality 94 Coarse Fine and thin
Hock quality 99 Filled Dry
Udder 97
Fore udder attachment 87 Loose Strong
Rear udder height 96 Low High
Rear udder width 97 Narrow Wide
Udder support 91 Weak Strong
Udder depth 98 Deep High
Udder balance 92 Deep rear udder Deep front udder
Teat length 108 Short Long
Teat thickness 115 Thin Thick
Teat placement (front) 95 Wide Close
Teat placement (back) 91 Wide Close

NAV proof run date: 12-08-2025 Reliability 53 % Number of daughters: 0

Name Scientific name Symptoms Code Result
JH1 Jersey Haplotype 1 (JH1F = Not carrier, JH1C = Single carrier, JH1S = Double carrier) JH1 is an autosomal Read more (JH1F = Not carrier, JH1C = Single carrier, JH1S = Double carrier) JH1 is an autosomal recessively inherited defect. The disorder was identified in the North American and the Nordic Jersey populations, however the frequency was somewhat lower in the Nordic population. JH1 primarily causes early embryonic death (spontaneous abortion), within the first 60 days of gestation. The key ancestor is believed to be Observer Chocolate Soldier (US 596832). https://omia.org/OMIA001697/9913/ JH1F Free

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