Mid-Coast_Cattleman's_Opportunity_Sale_Catalog

S ANTA G ERTRUDIS G ENETICS

The foundation of breed associations’ genetic evaluations is expected progeny differences (EPDs). EPDs are predictions of how an animal’s future progeny are expected to perform relative to other animals’ progeny listed in the breed association’s database. EPDs are expressed in units of measure (plus or minus) consistent with each trait being evaluated, and calculated utilizing pedigree and performance information. Years of research demonstrates that EPDs are the most reliable indicator of an animal’s true genetic merit. EPDs should be used to select for more or less of a trait, with the goal of finding the optimum trait(s) for an operation’s environment and marketing plan. Santa Gertrudis Breeders International (SGBI), an industry leader in genomic technology, was the first beef breed association to utilize the single-step method for incorporating DNA into EPD calculations. The SGBI single-step genomic prediction utilizes DNA information to measure the actual amount of relationship between animals in an evaluation. In 2013, SGBI released the first genomic-enhanced expected progeny differences (DNA verified) for Bos indicus-influenced cattle. The incorporation of DNA into the breed’s genetic evaluation results in information that is more accurate and predicable than a pedigree and performance prediction alone. SGBI’s genetic evaluation has been reviewed by the nation’s leading animal geneticists and utilizes more than 10,000 genotypes. Thousands of ranch phenotypes and scan records collected over a 30-year period support the evaluation. The SGBI genetic evaluation is recognized by industry members as one of the most comprehensive among the Bos indicus breeds. SGBI’s reliable genetic evaluation ensures that cattlemen can make sound comparisons, identifying animals that will perform at the highest level in the most challenging environmental conditions. SGBI offers three selection indexes for commercial cattlemen. Indexes are multi-trait selection tools designed to assist commercial producers by adding simplicity to genetic selection decisions. Indexes provide an estimate of how each sire’s future progeny are expected to perform, on average, compared to progeny of other sires in the database, if the sires were randomly mated to cows and if calves were exposed to the same environment. Selection indices are reported as a percentile ranking (top 1 percent – bottom 99 percent). SGBI Balanced Index – This index assumes that producers are keeping replacement heifers from the bulls they purchase. It further assumes that producers are either 1) marketing carcasses on the grid or 2) that buyers of their feeder calves base pricing on feedlot and carcass performance. Most large cow-calf operations fall into this category. SGBI Cow/Calf Index – This index assumes that producers are keeping replacement heifers from the bulls they purchase. However, it assumes all calves are marketed at weaning or soon thereafter. It further assumes that feeder calf buyers don’t base decisions on feedlot or carcass performance, making these traits less relevant to profitability. Many small- to mid-sized herd operations fall into this category. SGBI Terminal Index – This index assumes that producers are not keeping replacement heifers from the bulls they purchase. It assumes that producers are marketing carcasses on the grid, making carcass traits relevant to their business.

SGBI PERCENTILE RANKING FOR EPD TRAITS

March 2022

GROWTH & MATERNAL

INTAKE & CARCASS

INDEX VALUES

Percentile BW WW YW Milk TM SC HP BB HCW REA

Marb

Fat

Balanced Cow/Calf

Terminal 109.64

Best

5.8

56 38 33 30 29 28 23 18 14 12

92

17

32

1.18 0.90 0.85 0.80 0.77 0.74 0.66 0.53 0.45 0.40 0.36 0.33 0.30 0.27

6.50 4.52 3.84 3.42 3.15 2.96 2.22 1.64 1.28 1.07 0.91 0.79 0.62 0.32

7.08 4.10 3.62 3.14 2.87 2.59 1.90 1.16 0.90 0.76 0.64 0.56 0.40 0.15

36 20 16 14 13 12

0.7310 0.3672 0.3060 0.2772 0.2574 0.2436 0.1854 0.1205 0.0697 0.0326 0.0013 -0.0292

0.8979 0.4665 0.3953 0.3505 0.3097 0.2903 0.1873 0.0938 0.0422 0.0046 -0.0217 -0.0457

0.1111 -0.0441 -0.0373 -0.0316 -0.0292 -0.0268 -0.0197 -0.0118 -0.0081 -0.0052 -0.0027 0.0001 0.0034

81.85 50.00 44.50 41.63 39.48 37.29 31.60 24.59 20.14 16.56 13.28 10.27 7.26 4.17 -0.40

69.57 51.58 46.71 44.08 41.87 39.76 33.58 27.56 23.15 19.92 17.11 14.69 12.07

Top 1% Top 2% Top 3% Top 4% Top 5% Top 10% Top 20% Top 30% Top 40% Top 50% Top 60% Top 70% Top 80% Top 90%

-2.0 -1.7 -1.6 -1.4 -1.4 -1.1 -0.8 -0.5 -0.2

55 11 23

59.79 52.12 47.09 42.67 39.86 31.80 23.65 17.43 12.67 8.77 4.90 1.34 -2.15 -7.04

46 42 40 38 32 24 19 14 11

10

21 20 19 18 16 13 12 10

9 8 8 6 4 2 1 0

9 4 2

-1 -3 -5 -6 -8

0.0 0.3 0.6 0.9 1.5

9 7 4 1

8 7 6 4 2

7 4

-1 -2 -3 -5

-0.0563 -0.0717

-0 -6

-0.0858 -0.1263

-0.1010 0.0085

8.97 4.31

-4

0.20 -0.28 -0.54

-11

-0.1370

0.0180

2

CATTLEMAN'S OPPORTUNITY SALE • MAY 7, 2022