Page 9 - Turihaua 2020
P. 9

Group Breedplan (EBVs)


      Breeders using the new BREEDPLAN system of performance
      recording use an Estimated Breeding Value (EBV) to rank
      animals on different traits.
      An EBV is based on the animals own performance plus the
      performance of all known relatives, as well as adjusting
      for many environmental factors which also contribute to an
      animal’s actual growth rate.
      EBVs are shown as + or - kg liveweight. This means that
      an animal is ranked in comparison to the breed average.

      Accuracies:
      As a general rule animals can be compared on EBV’s
      regardless of accuracies; however, where two animals have
      similar EBV’s the one with the higher accuracy could be the
      better choice. Animals with higher accuracies will tend to
      breed more predictably to their genetic potential.

                    How to use EBV’s
      The first step is to decide what characters are important in
      your breeding programme, then select the EBV’s which fits
      that production system best.

             Definition for Growth EBV’s


      EBV’s for Birth Weight:
      Birth weight is a major factor in calving ease. Use the EBV’s
      to  select  against  birth  weight  if  you  are  having  calving
      problems. The lower the EBV here, the lighter the calves
      will be born.
      EBV for 200 Day Weight and Milk:
      The vealer producer should place emphasis on the 200 day
      growth and milk genes. If a bull is to be used as a terminal
      sire, growth is most important. If a bull is to be used to breed
      replacement heifers with superior milking and mothering
      ability, then consider the “milk genes” (200-day milk).





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