Page 9 - Leafland Simmental

EBV’s EXPLAINED
Calving Ease EBVs (%) are based on calving difficulty scores, birth weights and gestation length information. More positive EBVs are favourable and indicate easier calving.
- CE % Dir = Direct Calving Ease - The EBV for direct calving ease indicates the influence of the sire on calving ease in purebred females calving at two years of age.
- CE % Daughters = Daughters’ Calving Ease - The EBV for daughters’ calving ease indicates how easily that sire’s daughters will calve at two years of age.
Birth Weight – Estimates the bull’s genetic contribution to the birth weight of his calves. The lower the value the lighter the calf at birth and the lower the likelihood of a difficult birth and more live calves. Important when selecting sires for use over heifers.
200 Day Growth – Growth potential of calf from birth to weaning.
400 Day Weight – Growth potential of calf to yearling weight.
600 Day Weight – Growth potential beyond yearling weight.
200 Day Milk – The sires genetic influence on his daughters milk producing ability. Important as this will influence their calves 200 day growth. No Milk no Beef.
SS Scrotal Size – Indicator of male fertility in regards to semen quality and quantity. Higher (positive) EBV’s indicate higher fertility. SS is also positively associated with female fertility.
CWT – Estimates the genetic difference in carcase weight in kilograms at 650 days. The more + the figure the heavier the carcase at 20 months.
EMA – Eye Muscle Area (in square centimetres) on the live animal. More positive EBV’s indicate better muscling on animals.
Rib and Rump Fat – Estimates fat depth using ultrasound. More fat indicates early maturity.
RBY% – Retail Beef Yield% represents total (boned out) meat yield as a % of a 300kg carcase. A more + EBV indicates a higher % yield for the 300kg carcase.
UNDERSTANDING THE INDEXES:
Index values are provided for each bull. These allow the
expected profitability of the progency of different bulls to
be compared.
The Maternal Index compares sires on the basis that a proportion of their female progency will be retained in the herd as breeding replacements.
The Terminal Index compares sires on the basis that all progency will be finished for slaughter (no females retained for breeding).
2020 GROUP BREEDPLAN AVERAGE EBV’S FOR 2018 BORN CALVES
INDEXES
Maternal
Terminal
+79
+42
DIR
DTRS
BW
200D
400D
600D
MILK
SS
CWT
EMA
RIB
RUMP
RBY
+2.2
+1.0
+0.7
+19
+34
+43
+8
+0.4
+24
+2.6
+0.3
+0.1
+0.5
~9~