Name __________________

Problem Set 3

ANSI 5303 - Advanced Animal Breeding

There is a SAS program (with data) on the web page (program and data link) It is a TXT file. Open it in your web Browser and save it on a diskette. It contains a data set with 8000 milk production records on daughters of 29 sires with data from 11 herds over a seven year period. Open SAS and load heritmlk1.txt into the program editor. Since it is a .txt program, you will have to tell SAS to look for all files.

Run this program. Proc Mixed calculates components of variance and covariance. Under "Cov PARM" the sire line is the estimate of the sire variance and the residual line is the estimate of the within sire variance. Use these to calculate an estimate of heritability. Don't forget that the sire component of variance is an estimate of 1/4 of the additive variance.