AS-449
STAGES provides performance pedi-3s, which document consistent performance testing and selection. Performance pedigrees allow STAGES participants to provide superior Seedstock developed from generations of genetically superior ancestors. Identification of the truly superior Seedstock (i.e., that which consistently improves pork production efficiency) is only possible when complete performance pedigrees are available.
Performance Data Collection, Analysis, and Output
To participate in STAGES, the purebred producer collects basic performance information and submits it to his breed association for analysis. Only four measurements are required — (1) days to 230 pounds or average daily gain; (2) backfat thickness obtained on boars, gilts and barrows; (3) litter size; and (4) 21 -day litter weight for all purebred sows with either purebred (registered and unregistered) or crossbred litters.
Complete herd testing is very important. F h individual will be more accurately evaluated with complete herd testing through the accumulation of additional information on relatives and larger contemporary group sizes.
Once the performance information is submitted, the STAGES computer program adjusts the data for fixed effects (e.g., sex, age, parity, weight), calculates contemporary group averages, identifies data from relatives, and combines each individual’s performance data with those from relatives to calculate the EPDs and indexes. The resulting output forms give a complete summary of the performance of each animal, its EPDs, and index values.
Importance of Commercial Producer Support
The newly developed Swine Testing and Genetic Evaluation System now makes possible a more thorough and accurate evaluation of purebred swine herds. Selection of superior individuals based on STAGES analyses can accelerate the genetic improvement so important to efficient pork production. STAGES analyses will allow purebred producers to provide you with the most superior, predictable Seedstock possible.
Commercial producers interest and support will ultimately determine the success of STAGES. Here’s how you can show that support:
1.	Before purchasing boars or gilts, identify purebred producers who are using STAGES to improve production efficiency;
2.	Ask these Seedstock producers to provide the performance pedigrees that document the selection history of their herds;
3.	Then select individuals based on the STAGES analyses.
Cooperative Extension work in Agriculture and Home Economics, state of Indiana, Purdue University, and U.S Department of Agriculture cooperating; H.A Wadsworth, Director, West Lafayette, IN Issued in furtherance of the acts of May 8 and June 30, 1914. The Cooperative Extension Service of Purdue University is an affirmative action/equal opportunity institution
Introducing
-STAGES-
An Evaluation System For Purebred Swine: Guidelines For Commercial Producers
Purdue University Cooperative Extension Service West Lafayette, Indiana
In cooperation with the
Agricultural Research Service and Extension Service U.S. Department of Agriculture
REV 5/88 (6M)