4.1.4 – Describe the principles of genetic improvement & selection: Performance & Progeny testing

Bulls are housed in similar conditions (ICBF, Tully, Co Kildare)

Fed similar diets

Traits measured:o Average daily gain (ADG)o Linear scoring -

visual muscle & skeletal measures

Temperamento Ultrasound fat & muscle

o Food conversion ratio (FCR)

Allows €uro-star index be computed

Performance Testing

Progeny TestingDetermines the true breeding value of an animal

Offspring of bull tested for: Ease of calving Milk yield Milk solids

Test of the value for selective breeding of an individual's genotype by looking at the progeny produced.

Allows €uro-star index be computed

Keywords: Performance, Progeny, similar, ADG, Linear Scoring, FCR, Euro star rating, ultrasound, true breedingNumeracy: Linear score values, ADG, Euro star rating, LWG, milk yield, milk solids

4.1.4 – Describe the principles of genetic improvement & selection: Performance & Progeny testing

Task:

Compare & contrast performance & progeny testing

Keywords: Performance, Progeny, similar, ADG, Linear Scoring, FCR, Euro star rating, ultrasound, true breedingNumeracy: Linear score values, ADG, Euro star rating, LWG, milk yield, milk solids

Performance Testing Progeny Testing