EPD Test Questions and Correct Answers

EPD Test Questions and Correct Answers What does the abbreviation EPD stand for? - Answer-Expected Progeny Difference The first performance records measured what and at what age? - Answer-Measured weight/weight gains at weaning or yearling What does the abbreviation EBV stand for? - Answer-Estimated Breeding Value What made the EBV statistic useful? - Answer-It combined an animals own records to those of relatives and progeny and included heritability What is one disadvantage of EBV? - Answer-it consisted mostly of in group records, causing faulty comparisons between groups or herds. What two advantage do EPDs have over EBVs? - Answer-EPDs have more scope and precision. EPDs allow you to make a more valid comparison between groups, not just within a single group. What does the abbreviation NSE stand for? - Answer-National Sire Evaluation What was the NSE? - Answer-A program conducted by some breed registry associations to compare performance using Reference Sires. It was the first practical implementation of EPDs What are some assumptions that limited the validity of the NSE? - Answer-Bulls are not genetically related. Bulls mated to females of equal genetic merit. No progeny was culled before records were collected. Breed averages do not change over time. What does the abbreviation NCE stand for? - Answer-National Cattle Evaluation What is NCE? - Answer-A more precise and accurate program to caluclate EPDs within breeds that incorporates more information to determine the EPD than NSE. What information does NCE include that NSE did not? - Answer-Adjustment for differences in genetic merit of females. Genetic correlation between traits.