Page 7 - Waiterenui 2020
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BREEDPLAN


       CE  %  DAUGHTERS  =  DAUGHTERS’  CALVING  EASE - The EBV for daughters’   age and is an indicator of growth at later ages and potential feed
       calving ease indicates how easily that sire’s daughters will calve at   maintenance requirements of the females in the breeding herd.
       two years of age.                                       Steer breeders wishing to grow animals out to a larger weight may
       GESTATION LENGTH EBV (days) is an estimate of the time from conception   also use the Mature Cow Weight EBV.
       to the birth of the calf and is based on AI and hand mating records.   MILK EBV (kg) is an estimate of an animal’s milking ability. For sires, this
       Lower (negative) GL EBVs indicate shorter gestation length and   EBV indicates the effect of the daughter’s milking ability, inherited
       therefore easier calving and increased growth after birth.   from the sire, on the 200-day weights of her calves. For dams, it
       BIRTH WEIGHT EBV (kg) is based on the measured birth weight of progeny,   indicates her milking ability.
       adjusted for dam age. The lower the value, the lighter the calf at birth   SCROTAL SIZE EBV (cm) is calculated from the circumference of the
       and the lower the likelihood of a difficult birth. This is particularly   scrotum taken between 300 and 700 days of age and adjusted to
       important when selecting sires for use over heifers.    400 days of age. This EBV is an estimate of an animal’s genetic merit
       200-DAY GROWTH EBV (kg) is calculated from the weight of progeny   for scrotal size. There is also a small negative correlation with age
       taken between 80 and 300 days of age. Values are adjusted to 200   of puberty in female progeny and therefore selection for increased
       days and for age of dam. This EBV is the best single estimate of an   scrotal size will result in reduced age at calving of female progeny.
       animal’s genetic merit for growth to early ages.        DAYS TO CALVING EBV (days) indicates the fertility of the daughters of the
       400-DAY WEIGHT EBV (kg) is calculated from the weight of progeny   sire. It is the time interval between the day when the female is first
       taken between 301 and 500 days of age, adjusted to 400 days and   exposed to a bull in a paddock mating to the day when she subsequently
       for age of dam. This EBV is the best single estimate of an animal’s   calves. A negative EBV for days to calving indicates a shorter interval
       genetic merit for yearling weight.                      from bull-in date to calving and therefore higher fertility.
       600-DAY WEIGHT EBV (kg) is calculated from the weight of progeny   CARCASE WEIGHT EBV (kg) is based on abattoir carcase records and is
       taken between 501 and 900 days of age, adjusted to 600 days and   an indicator of the genetic differences in carcase weight at the
       for age of dam. This EBV is the best single estimate of an animal’s   standard age of 750 days.
       genetic merit for growth beyond yearling age.           EYE MUSCLE AREA EBV (sq cm) is calculated from measurements from live
       MATURE COW WEIGHT EBV (kg) is based on the cow weight when the   animal ultrasound scans and from abattoir carcase data, adjusted to
       calf is weighed for weaning, adjusted to 5 years of age. This EBV is   a standard 400 kg carcase. This EBV estimates genetic differences in
       an estimate of the genetic difference in cow weight at 5 years of   eye muscle area at the 12/13th rib site of a 400 kg dressed carcase.
                                                               More positive EBVs indicate better muscling on animals. Sires with

                                                                      W aiterenui Angus    |    2 year old  Bull Sale 20 20    |     P age   5
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