In January 2009, the first sires with genomic proofs made their debut and topped the lineup. With the addition of daughters, little has changed. The elite genomic sires of yesterday are now the elite daughter-proven sires of today. Believe in the power of genomics - we do and here's why:
The Genomics Report Card
By: Jenny DeMunck, Dairy Product Manager,
From the April 2012 Genex Dairy Horizons
To evaluate the precision of genomic proofs, the standard is to compare bulls' genomic genetic evaluations to their daughter-proven evaluations. This provides a sort of "report card" on genomic evaluations. The "report cards" below show minimal average changes in genetic evaluations as Holstein and Jersey sires go from genomic-proven evaluations to proofs primarily based on daughters.
Holsteins: How Much of a Change?
The two tables below show the average change as genomic-proven Holstein sires add milking daughters. The report card includes Holstein bulls that were genomic-proven in August 2010 and now have a minimum of 40 daughters in their production proof and a minimum of 10 daughters in their type proof.
For example, as Table 1 shows Holstein bulls industrywide average a $29 decrease in Lifetime Net Merit (LNM) as they gain milking daughters. This is based on data from more than 2,100 bulls that average 105 daughters. Table 2 shows Holstein bulls decrease 0.20 points in PTA Type as they gain daughters. This data is based on more than 1,500 bulls that average 59 daughters each.
Table 1. Industrywide Change for LNM, Production and Health Traits as Holstein Genomic Bulls Add Milking Daughters (Comparing August 2010 proofs to April 2012 proofs)1
1 40 daughter minimum requirement
Table 2. Industrywide Change for ConformationTraits as Holstein Genomic Bulls Add Milking Daughters (Comparing August 2010 proofs to April 2012 proofs)2
2 10 daughter minimum requirement
Jerseys: How Much of a Change?
The following tables show the average change in genetic traits as genomic-proven Jersey sires add a significant number of milking daughters (10 daughter minimum requirement for production proof, 10 daughter minimum requirement for type data).
Table 3 shows as Jersey bulls have gained milking daughters their proof for Cheese Merit (CM) increased $41. This is based on data from 265 sires that average 73 milking daughters. Similarly, Table 4 shows that as Jersey bulls transition to daughter proven they have averaged a 0.13 increase in JUI™.
Table 3. Industrywide Change for CM, Production and Health Traits as Jersey Genomic Bulls Add Milking Daughters (Comparing August 2010 proofs to April 2012 proofs)3
3 10 daughter minimum requirement
Table 4. Industrywide Change for Conformation Traits as Jersey Genomic Bulls Add Milking Daughters (Comparing August 2010 proofs to April 2012 proofs)4
4 10 daughter minimum requirement
Genomic-proven bulls provide unmatched and documented opportunity to accelerate genetic progress and improve farm profitability. The recommended best practice for any producer is to use a group of genomic-proven bulls that fit the herd's breeding goals. By using a group of bulls, producers will minimize impact of any one bull with significant changes in PTA and provide greater means to manage inbreeding and genetic diversity.
Learn more about genomics on the Genex Learning Center.
For further information, contact your local Genex representative.