Page 10 - Puke-Nui Angus Catalogue eBook.pdf

indicate easier calving. 600-Day Weight EBV (kg) is calculated from the weight of progeny taken
CE % Direct = Direct Calving Ease - The EBV for direct calving ease between 501 and 900 days of age, adjusted to 600 days and for age of
indicates the influence of the sire on calving ease in purebred females dam. This EBV is the best single estimate of an animal’s genetic merit for
calving at two years of age. growth beyond yearling age.
CE % Daughters = Daughters’ Calving Ease - The EBV for daughters’ Mature Cow Weight EBV (kg) is based on the cow weight when the
calving ease indicates how easily that sire’s daughters will calve at two calf is weighed for weaning, adjusted to 5 years of age. This EBV is an
years of age. estimate of the genetic difference in cow weight at 5 years of age and
is an indicator of growth at later ages and potential feed maintenance
Gestation Length EBV (days) is an estimate of the time from conception requirements of the females in the breeding herd. Steer breeders
to the birth of the calf and is based on AI and hand mating records. wishing to grow animals out to a larger weight may also use the Mature
Lower (negative) GL EBVs indicate shorter gestation length and therefore Cow Weight EBV.
easier calving and increased growth after birth.
Birth Weight EBV (kg) is based on the measured birth weight of progeny, Milk EBV (kg) is an estimate of an animal’s milking ability. For sires, this
EBV indicates the effect of the daughter’s milking ability, inherited from
adjusted for dam age. The lower the value, the lighter the calf at birth and the sire, on the 200-day weights of her calves. For dams, it indicates her
the lower the likelihood of a difficult birth. This is particularly important milking ability.
when selecting sires for use over heifers.
200-Day Growth EBV (kg) is calculated from the weight of progeny taken Scrotal Size EBV (cm) is calculated from the circumference of the
scrotum taken between 300 and 700 days of age and adjusted to 400
between 80 and 300 days of age. Values are adjusted to 200 days and days of age. This EBV is an estimate of an animal’s genetic merit for
for age of dam. This EBV is the best single estimate of an animal’s genetic scrotal size. There is also a small negative correlation with age of puberty
merit for growth to early ages. in female progeny and therefore selection for increased scrotal size will
400-Day Weight EBV (kg) is calculated from the weight of progeny taken result in reduced age at calving of female progeny.
between 301 and 500 days of age, adjusted to 400 days and for age of Days to Calving EBV (days) indicates the fertility of the daughters of
dam. This EBV is the best single estimate of an animal’s genetic merit for the sire. It is the time interval between the day when the female is first
yearling weight. exposed to a bull in a paddock mating to the day when she subsequently

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