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Better Mothers
To ensure a more profitable sheep stock, a hill farmer needs ewes to be better mothers.
Compare:
- 2 tups, bought at a top breeders’ sale in the early 1990’s, (these were obviously bought by eye with no performance data available)
The tups Sire X and Sire Y were
- Bought by the same buyer
- Used on the same farm,
- To produce ewes lambs born in the same year.
- These ewe lambs were kept as breeding stock
- The ewes bred by these two sires were then compared over their productive life.
- Daughters of Sire X produced on average almost twice as much weight of lamb
at 8 weeks each (and every) year, as daughters of Sire Y
The Signet “Sheepbreeder” scheme updates all the performance records of every animal ever recorded and we can now look at the Estimated Breeding Values (EBVs) of Sire X and Sire Y by calculation from their descendants.
Compare these to the scheme average for bfelite animals in 2005.
EBVs |
Sire X |
Sire Y |
2005 bfelite Average |
8 week Weight |
0.04 |
-0.17 |
0.64 |
Mature Size |
0.15 |
-2.63 |
2.02 |
Litter Size |
0.18 |
-0.31 |
0.07 |
Maternal |
0.29 |
-1.36 |
0.36 |
Scan Weight |
-0.25 |
-1.23 |
1.60 |
Muscle Depth |
1.04 |
-1.16 |
0.55 |
Fat Depth |
0.27 |
-0.56 |
0.06 |
Hill 2 Index |
151 |
-51 |
141 |
None of us wants a tup that performs like Sire Y – but how do you tell when your money is on the line? The answer is to use EBV's
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