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 $uperBorder$:

$uperBorder$ Logo is the brand name for Border Leicester Rams that are of high genetic merit in meat traits. They have been bred to quality standards in Border Leicester flocks and each ram has been measured for growth, fat and muscle by accredited operators and independently analysed by LAMBPLAN for genetic merit expressed as Estimated Breeding Values (EBVs). Each ram sold with EBVs which have been standardised between flocks by means of link sires and represent the value of the genes that will be passed on to the First-cross progeny.

Research station trials within the Maternal Central Progeny Test (MCPT) show that there are large differences in $ returns between prime lamb mothers bred from different sires. The Border breed is amongst the best, but choosing the best ram is more important than choosing the breed. You can use $uperBorder$ ratings to choose the best rams.

Each ram is presented with its EBVs, in the same way as the terminal sires, however there are more traits to assess than growth and carcass. These traits can be key profit drivers for prime lamb production as they largely reflect reproduction and the ewe's ability to rear their lambs. One of the major extra EBVs is Number of Lambs Weaned (NLW). Another is Milk Yield (shown as Maternal Weaning Weight (Mwwt), because it is assessed by san analysis of the growth to weaning of different sire lines traced through the ewe). Some breeders are also recording and selecting for worm resistance.

Rams are given an overall rating as a Dollar Index. This is built from the dollar values of each extra kg of weight or extra lamb weaned. As an example, an index of 105 would return an extra $5 for each ewe joined each year, or $1,000 for a lifetime's progeny of 200 lambs. This extra value would be shared by the First and Second-cross breeders.

A $uperBorder$ ram must be above breed average for growth and number of lambs weaned. They must also be within set limits for fat and eye-muscle depth. These rams are tagged with the special $uperBorder$ tag. Prime lamb breeders can use ewes bred from these rams with the confidence that they are the best of the breed.

First Cross Ewes

 

Reading an Estimated Breading Value (E.B.V.)

Each $uperBorder$ ram is sold with information about its separate estimated breeding values or EBVs, which can be used to choose the rams that suit your production system. A typical listing will show:-

  • Mwwt: Ewe effect on weaning weight (eg Milk)
  • Wwt: Weaning weight (kg)
  • Ywt: Yearling weight (kg)
  • Yfat: Yearling fat depth (mm)
  • Yemd: Yearling eye muscle depth (mm)
  • Ygfw: Yearling wool weight (kg)
  • Nlw: Number of lambs weaned (proportion)

A weight EBV of +2.0 means the ram has genes that are 2 kg better than the breed average. A lamb gets half its genetics from the ram, so will be 1kg heavier than the breed average when joined to equal quality ewes.

In a similar way, an Nlw EBV of +0.10 means the ram has genes for 10% more lambs above the breed average. The First-cross ewe bred from that ram will wean 5% more lambs then the breed average.

If you want more growth, higher fertility or less fat, choose the rams that have those characteristics.

More information can be found on the $uperborder$ web site: - www.superborders.com

 
   
   
    
 
   
   
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