The correlation between the true breeding value and the estimated breeding value is the accuracy of the estimated breeding value. The formula depends on the method of estimation i.e the source of information used for estimation of breeding value.

However, the second question is not clear to me.

breeding value

the sum of gene effects of a breeding animal as measured by the performance of its progeny.

estimated breeding value

an estimate of the ability of an individual to produce superior offspring; based on one or more measurements of performance, using phenotypic values, taken on the animal itself or, more commonly, on a number of its relatives.

true breeding value

genetic merit of an individual which can be conceptually defined as twice the average deviation of its offspring from the population mean when mated randomly to an infinite population.

true overall breeding value

the true, overall breeding value arrived at by the addition of the true breeding values for each selection objective with each true breeding value multiplied by the relevant net economic value.

The BV of the individual estimate from his ( her ) progeny performance as a deviation from the population mean , multiple by two ( × 2 ) , and refer to the additive genes effects .

The accuracy depend on the amount of deviation between EBV and true BV .

Good Luck

The EBV was consisted of relative and absolute EBV's. Each equation were:

EBV relative = h2 x (Pind - Ppop)

EBV absolute = h2 x( Pind - Ppop) + Ppop

Commonly, EBV relative was used for selection of bull of heifer in Indonesia. The negative value means that the animals were under the average population traits. Thanks

thanks

The accuracy of a breeding value is the correlation of the true breeding and tge EBV. Higher accuracy (>60%) means that the animals phenotypic records of that particular animal can be used as a measure of the genetic potential (BV) of that animal.