Selection Criteria For Bulls
The selection of bulls rest on Phases A, B, C and D. Phase B is compulsory for all bulls. For AI. Bulls Phase C (FCR) or an intensive Phase D (Kleiber index) is compulsory. For commercial bulls an extensive Phase D test is recommended although Phase B data will suffice. BLUP estimated breeding values are very useful.
1.1 Minimum Standards
ADG/ADC indexes of at least 90 for Phase A, B, C and D. Minimum indexes of 90 are required for feed conversion (Phase C) and Kleiber indexes (Phase D).
1.2 Conformation And Maturing Class
The norms in respect of conformation traits are contained in the inspection policy and standards of excellence. For purposes of registration animals must conform to such standards.
1.3 Reproduction Traits
Scrotal circumference measured in relation to body weight and\or age.
Any morphological deviations are considered disqualifications. Bulls younger than 12 months are measured irrespective of whether they conform in terms of weight. The following minimum standards are applicable in respect of bulls between 12 and 36 months –
- Refer to minimum breed standards
Sheath size and shape
Discriminate against\disqualify for excessive size or abnormality.
2. Traits To Be Measured By Breeders For The Purpose Of Performance Testing:
2.1 Cow Weight
a) At weaning of calf
b) Within three days after calving*
- Optional for the time being, but highly recommended
2.2 Birth Weight Of Calves
2.3 Weight At 1 Year And 18 Months