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A Summary of EBVs and $Index Values
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here for a comprehensive list of answers to Frequently
Asked Questions about Breedplan Accuracy (%) ~ Provides an indication of the reliability of an EBV. As more performance information becomes available on an animal (or it’s progeny, or relatives) then the accuracy of it’s EBVs for particular traits will increase. See Understanding Accuracies for a more detailed explanation. Calving Ease DIR (%) ~ Estimates of the genetic differences between animals in the ability of their calves from 2 year old heifers to be delivered without assistance. Calving Ease DTRS (%) ~ Estimates of the genetic differences between animals in the ability of their 2 year old daughters to calve without assistance. Gestation Length (Days) ~ Estimates of the genetic differences between animals in the number of days from the date of conception to the calf birth date. Birth Wt (kg) ~ Estimates of the genetic differences between animals in calf birth weight. 200-Day Wt (kg) ~ Estimates of the genetic differences between animals in liveweight at 200 days of age. 400-Day Wt (kg) ~ Estimates of the genetic differences between animals in liveweight at 400 days of age. 600-Day Wt (kg) ~ Estimates of the genetic differences between animals in liveweight at 600 days of age. Mature Cow Weight (kg) ~ Estimates of the genetic differences between animals in cow weight at 5 years of age. Milk (kg) ~ Estimates of the genetic differences between animals in milk production, expressed as variation in 200-day weight of daughter's calves. Scrotal Size (cm) ~ Estimates of the genetic differences between animals in scrotal circumference at 400 days of age. Days to Calving ~ Estimates of the genetic differences in female fertility, expressed as the number of days from the start of the joining period until subsequent calving. Carcase Weight (kg) ~ Estimates of the genetic differences between animals in carcase weight, adjusted to 650 days of age. Eye Muscle Area (cm2) ~ Estimates of the genetic differences between animals in eye muscle area at the 12/13th rib site, in a 300kg carcase. Rib Fat (mm) ~ Estimates of the genetic differences between animals in fat depth at the 12/13th rib site, in a 300 kg carcase. Rump Fat (mm) ~ Estimates of the genetic differences between animals in fat depth at the P8 rump site, in a 300kg carcase. Retail Beef Yield % (RBY%) ~ Estimates of the genetic differences between animals in percentage retail beef yield, in a 300kg carcase. Intra-Muscular Fat % (IMF%) ~ Estimates of the genetic differences between animals in percentage intra-muscular fat (marbling) at the 12/13th rib site, in a 300 kg carcase. Trial Net Feed Intake (NFI) ~ Estimates of the genetic differences in feed intake for animals adjusted to the same growth rate and weight base. Japan B3 Index ($) ~ Estimates of the genetic differences between animals in net profitability per cow joined for an example commercial herd targeting the production of steers for the Japanese B3 market. CAAB Index ($) ~ Estimates of the genetic differences between animals in net profitability per cow joined for an example commercial herd targeting Certified Australian Angus Beef production. Supermarket Index ($) ~ Estimates of the genetic differences between animals in net profitability per cow joined for an example commercial herd targeting the production of steers and heifers for the domestic supermarket trade. Northern Terminal Index ($) ~ Estimates of the genetic differences between animals in net profitability per cow joined for an example commercial crossbred herd in northern Australia using Angus bulls over tropical adapted cows to produce terminal progeny to be grain fed for the Japanese B2 market. NB. actual $Index Values for individual animals are sensitive to the assumptions used in the BREEDOBJECT analysis used to calculate the selection index. See Understanding $Index Values for a more detailed explanation. NB. EBVs and $Index Values are calculated using software developed by the Animal Genetics and Breeding Unit (AGBU), a joint institute of NSW Agriculture and The University of New England. Ongoing research and development at AGBU is supported by funding provided by Meat and Livestock Australia. |
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