By sarvika
CEDir
UNDERSTANDING ESTIMATED BREEDING VALUES (EBVS)
Genetic differences in the ability of a sire's calves to be born unassisted from 2 year old heifers. calving difficulties in 2 year old heifers.
Calving Ease/Birth
CEDtrs days
Genetic differences in the ability of a sire's daughters to calve unassisted at 2 years of age.
Higher EBVs indicate fewer calving difficulties in 2 year old heifers. Genetic differences between animals in the length of time from the date of conception to the Lower EBVs indicate shorter birth of the calf. gestation length. Lower EBVS indicate lighter birth weight.
Genetic differences between animals in live weight at 200 days of age due to genetics for Higher EBVS indicate heavier growth.
Genetic differences between animals in calf weight at birth.
Genetic differences between animals in live weight at 400 days of age.
Genetic differences between animals in live weight at 600 days of age.
Genetic differences between animals in the height of mature females.
Genetic differences between animals in the body condition of mature females.
Genetic differences between animals in live weight of cows at 5 years of age.
Higher EBVS indicate more body condition of mature females.
Higher EBVS indicate heavier mature weight.
Genetic differences between animals in live weight at 200 days of age due to the maternal Higher EBVS indicate heavier contribution of its dam. live weight.
Genetic differences between animals in the time from the start of the joining period (i.e. when the Lower EBVs indicate shorter female is introduced to a bull) until subsequent calving. time to calving.
Genetic differences between animals in scrotal circumference at 400 days of age.
Higher EBVs indicate larger scrotal circumference. Higher EBVS indicate heavier carcase weight.
Genetic differences between animals in hot standard carcase weight at 750 days of age. Genetic differences between animals in eye muscle area at the 12/13th rib site in a 400 kg Higher EBVs indicate larger cm²
Genetic differences between animals in fat depth at the 12/13th rib site in a 400 kg carcase.
Genetic differences between animals in fat depth at the P8 rump site in a 400 kg carcase.
Genetic differences between animals in boned out saleable meat from a 400 kg carcase. Genetic differences between animals in intramuscular fat (marbling) at the 12/13th rib site in Higher EBVs indicate more a 400 kg carcase. intramuscular fat.
Genetic differences between animals in feed intake at a standard weight and rate of weight Lower EBVS indicate more gain when animals are in a feedlot finishing phase.
Genetic differences in claw set structure (shape and evenness of claws).
Genetic differences in foot angle (strength of pastern, depth of heel).
Genetic differences in rear leg structure when viewed from the side (angle at front of the hock).
Genetic differences between animals in net profitability per cow joined in a typical commercial self replacing herd using Angus bulls. This selection index is not specific to a particular market end-point, but identifies animals that will improve overall net profitability in the majority of commercial, self replacing, grass and grain finishing beef production systems.
The $A-L index is similar to the $A index but is modelled on a production system where feed is surplus to requirements for the majority of the year, or the cost of supplying additional feed when animal feed requirements increase is low.
While the $A aims to maintain mature cow weight, the $A-L does not aim to limit the increase in mature cow weight as there is minimal cost incurred if the feed maintenance requirements of the female breeding herd increase as a result of selection decisions.
feed efficiency.
Higher EBVS indicate better temperament.
Lower EBVs indicate less curl of the claw set.
Lower EBVS indicate more heel depth.
Lower EBVs indicate a less angular leg angle.
Higher selection indexes indicate greater profitability.
Higher selection indexes indicate greater profitability.