Using Performance Data to pick the best sheep
-GROWTH

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Pick the ram most likely to improve weaning weight in your flock if you were given
performance data presented in the following three ways.

The following are Examples Only


A. Where only weaning weights of the rams are known.

Ram

120/02

143/02

Weaning Weight 35.0 kg 38.5 kg

B. Where weaning weights and dates of birth are known.

Ram

120/02

143/02

Weaning Weight 35.0kg 38.5kg
Date of Birth 10-Sep 30-Aug
Growth to Weaning 270g/day 273g/day
Adjusted weaning weight
(Adjusted to birth date of 1-Sep)
37.4 kg 37.5 kg

C. Where weaning weights, dates of birth, and the performance of other
progeny born to the sire and dam are known.

Ram

120/02

143/02

Weaning Weight 35.0kg 38.5kg
Date of Birth 10-Sep 30-Aug
Growth to Weaning 270g/day 273g/day
Adjusted weaning weight
(Adjusted to birth date of 1-Sep)
37.4 kg 37.5 kg
Family average growth rate 320g/day 260g/day
Weaning weight BV +1.9 kg +0.21 kg

Questions

Conclusions

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This info has been provided by S.I.L - Examples for breeders to use - 3rd April 2003

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Last revised: September 20, 2013
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