Page 4 - Rock-End Herefords Catalogue ebook
P. 4

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                                                                        Milk
                         Rump Fat
                                                              SS
                                           EMA
                                                                                  600D
             IMF
                                                                                                                 Birth Wt
                                                                                            400D
                                                                                                      200D
                                                     CWT
                                  Rib Fat
                                                                                            2021 HEREFORD GROUP BREEDPLAN FOR 2019 BORN CALVES
                                                                                                                  progeny taken between 501 and 900 days of age, adjusted to 600
                                                                                                                  600:   600-day Weight EBV (kg) is calculated from the weight of
                                                           larger more positive values are generally more favourable.
                                                                                                                  animal’s genetic merit for yearling weight.
                                                           12/13  rib site in a 300kg carcase.  Depending on target markets,
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                                                                                                                  days and for dam age.   This EBV is the best single estimate of an
                                                           genetic difference in the percentage of intra-muscular fat at the
                                                                                                                  progeny taken between 301 and 500 days of age, adjusted to 400
                                                           IMF %:   Intra-muscular Fat Percent EBV (%) is an estimate of the
                                                                                                                  400:  400-day Weight EBV (kg) is calculated from the weight of
                                                           carcase.   More positive EBVs indicate better muscling on animals.
                                                                                                                  estimate of an animal’s genetic merit for growth to weaning.
                                                           in eye muscle area at the 12/13  rib site of a 300kg dressed
                                                                                                                  adjusted to 200 days and for dam age.   This EBV is the best single
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                                                           EMA:  Eye Muscle Area EBV (cm ) estimates genetic differences
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                                                                                                                  of animals taken between 80 and 300 days of age. Values are
                                                                                                                  200:  200-day Growth EBV (kg) is calculated from the weight
                                                           maturity.
                                                           More positive EBVs indicate more subcutaneous fat and earlier
                                                                                                                  affects the 200 day weight of their calves.
                                                           differences in fat depth at the P8 site of a 300kg dressed carcase.
                                                                                                                  sires, this EBV is indicative of their daughter’s milking ability as it
                                                           RUMP FAT:   Rump Fat EBV (mm) estimates the genetic
                                                                                                                  Milk EBV (kg) is an estimate of an animal’s milking ability.   For
                                                           positive EBVs indicate more subcutaneous fat and earlier maturity.
                                                                                                                  heifers.
                                                           fat depth at the 12/13  rib in a 300 kg dressed carcase.   More
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                                                                                                                  This is particularly important when selecting sires for use over
                                                           RIB FAT:  Rib Fat EBV (mm)  estimates the genetic differences in
                                                                                                                  lighter the calf at birth and the lower the likelihood of a difficult birth.
                                                                                                                  weight of animals, adjusted for dam age.   The lower the value the
                                                           animal’s genetic merit for growth beyond yearling age.
                                                                                                                  BWT:  Birth Weight EBV (kg) is based on the measured birth
                                                           days and for dam age.   This EBV is the best single estimate of an
                                                                                                                  young bulls with performance data but no progeny will all have similarly low accuracies.
                                                                                                                  animal’s EBV as more information is analysed for that animal or it’s relatives.   Accuracy below 75% should be considered low, however
                                                                                                                  amount of information that has been used in the calculation of that EBV.   The higher the accuracy the lower the likelihood of change in the
                                                                                                                  An EBV is the best estimate of an animal’s genetic merit for that trait.  An accuracy is presented with every EBV and is an indication of the
                                                                                                                  EBVs EXPLAINED - Estimated Breeding Values (EBVs)
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