Page 7 - Waiterenui Angus Sale 2021 ebook

TACE

CALVING EASE EBVS (%) are based on calving difficulty scores, animal’s genetic merit for yearling weight.
birth weights and gestation length information. More positive EBVs 600-DAY WEIGHT EBV (kg) is calculated from the weight of
are favourable and indicate easier calving. progeny taken between 501 and 900 days of age, adjusted to 600
CE % DIRECT = DIRECT CALVING EASE - The EBV for direct calving days and for age of dam. This EBV is the best single estimate of an
ease indicates the influence of the sire on calving ease in purebred animal’s genetic merit for growth beyond yearling age.
females calving at two years of age. MATURE COW WEIGHT EBV (kg) is based on the cow weight when
CE % DAUGHTERS = DAUGHTERS’ CALVING EASE - The EBV for the calf is weighed for weaning, adjusted to 5 years of age. This EBV
daughters’ calving ease indicates how easily that sire’s daughters is an estimate of the genetic difference in cow weight at 5 years of
will calve at two years of age. age and is an indicator of growth at later ages and potential feed
GESTATION LENGTH EBV (days) is an estimate of the time from maintenance requirements of the females in the breeding herd.
conception to the birth of the calf and is based on AI and hand Steer breeders wishing to grow animals out to a larger weight may
mating records. Lower (negative) GL EBVs indicate shorter gestation also use the Mature Cow Weight EBV.
length and therefore easier calving and increased growth after birth. MILK EBV (kg) is an estimate of an animal’s milking ability. For
BIRTH WEIGHT EBV (kg) is based on the measured birth weight of sires, this EBV indicates the effect of the daughter’s milking ability,
progeny, adjusted for dam age. The lower the value, the lighter the inherited from the sire, on the 200-day weights of her calves. For
calf at birth and the lower the likelihood of a difficult birth. This dams, it indicates her milking ability.
is particularly important when selecting sires for use over heifers. SCROTAL SIZE EBV (cm) is calculated from the circumference of
200-DAY GROWTH EBV (kg) is calculated from the weight of the scrotum taken between 300 and 700 days of age and adjusted to
progeny taken between 80 and 300 days of age. Values are adjusted 400 days of age. This EBV is an estimate of an animal’s genetic merit
to 200 days and for age of dam. This EBV is the best single estimate for scrotal size. There is also a small negative correlation with age
of an animal’s genetic merit for growth to early ages. of puberty in female progeny and therefore selection for increased
scrotal size will result in reduced age at calving of female progeny.
400-DAY WEIGHT EBV (kg) is calculated from the weight of
progeny taken between 301 and 500 days of age, adjusted to 400
days and for age of dam. This EBV is the best single estimate of an

W aiterenui Angus | 2 year old Bull Sale 20 2 1 | P age 5