Selection indexes are used to assign emphasis to each trait and provide a single value to use when comparing animals. Terminal indexes for the five boars in Table 5 show that when selecting for both growth and fat boar C rises in the ranking. Terminal Indexes for five boars. None of the procedures discussed presently account for genetic differences across breeds or lines of hogs. However, research is currently underway, developing procedures for multi-breed genetic evaluations.
Limited information is available from research trials and progeny tests that have been conducted.
Also, the National Pork Producers is currently conducting a National Genetic Evaluation Program. NO genetic information can be compared across breeds of swine and most types of genetic information can only be used when making selections within a contemporary group. To make sound selection decisions you must understand how the measuring is done, what equipment is being used, and how the data is being reported. Suggested Reading Belonsky, G.M. and B.W. Kennedy. Selection on individual phenotype and best linear unbiased predictor of breeding value in a closed swine herd.