Page 10 - Waitangi Catalogue ebook
P. 10

HERITABILITIES of TRAITS IN ANGUS


       Only part of the variation observed in animals is due to genetic difference. The majority
       of the variation is due to non-genetic factors such as the environment or nutrition.  The
       degree to which genetic differences influences performance varies from trait to trait and
       is explained by differences in “heritability” of the traits.  Growth and carcase traits have
       moderate  to  high heritabilities (20-60%), Whilst maternal  traits  have low heritabilities
       (10% or lower).  TACE takes into account the different degrees of heritability of various
       traits, and the known genetic relationships between the traits.

       All our bulls have been i50k tested for enhanced EBV predictability.










                         Heritability Estimates



          Calving Ease Dir  14% 86%
          Gestation Length                              65% 35%
                Birth Wt             32% 68%
              200-Day Wt  12% 88%
              400-Day Wt        23% 77%
              600-Day Wt               35% 65%
           Mature Cow Wt                  40% 60%
                  Milk  10% 90%
              Scrotal Size               39% 61%
           Days to Calving  7% 93%
              Carcass Wt                  41% 59%
           Eye Muscle Area            34% 66%
                 Rib Fat                    45% 55%
               Rump Fat              32% 68%
         Retail Beef Yield %                         60% 40%
       Intra-muscular Fat %          32% 68%
                         The amount of genetic      The amount of environmental
                         influence in a trait.   (non-genetic) influence in a trait.

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