Charolais Bulls
USING CHAROLAIS EPDS FOR SELECTION
• Birth Weight EPD (BW) The expected difference in average birth weight (pounds) of progeny. Birth weight reflects prenatal growth. • Calving Ease Direct (CE) is expressed as a difference in percentage of unassisted births in first calf heifers. A higher value indicates greater calving ease. It predicts the average difference in unassisted births with which a sire’s calves will be born when bred to first-calf heifers. • Calving Ease Maternal (MCE) is expressed as a difference in percentage of unassisted births in first calf daughters. A higher value indicates greater calving ease. It predicts the average difference in unassisted births with which a sire’s daughters will calve as first-calf heifers when compared to daughters of other sires. • Weaning Weight EPD (WW) The expected difference in average weaning weight of calves. The evaluation reflects the genetic influence on pre-weaning growth rate. • Yearling Weight EPD (YW) The expected difference in average yearling weight of progeny. The evaluation reflects genetic influence on both pre-weaning and post-weaning growth rate. • Maternal Milk EPD (Milk) The genetic ability of a sire’s or dam’s daughters to express in pounds of weaning weight in her calves due to her maternal ability through mothering instinct and milk. • Total Maternal EPD (MTL) A value to predict the weaning weight performance of calves from a animal’s daughters due to genetics for growth and maternal ability. Total Maternal is calculated by adding ½ the WW EPD to the Maternal Milk EPD. • Scrotal Circumference EPD (SC) The expected difference in scrotal circumference (expressed in centimeters) of a bull’s or dam’s male offspring at yearling compared to progeny of all other animals evaluated. Research has also indicated a relationship between increased SC EPD and decreased age at puberty for daughters. • Carcass records are adjusted to an age constant endpoint. Therefore selection based on any or all of the carcass merit EPD are comparable among cattle at the same age endpoint. For example selection based on increased EPD for carcass weight will result in heavier carcass weights than those animals with lower EPD for carcass weights when the cattle are harvested at the same age. • Carcass Weight EPD (CW) Expected progeny differences for Carcass Weight is a predictor of pounds of retail product at a constant age endpoint. Selection for increased values should result in heavier carcasses, while selection for decreased values should result in lighter carcass weights at the same age endpoint. Carcass Weight EPD are expressed in pounds and is a predictor of the
differences in hot carcass weight between parents progeny at an age constant endpoint. • Ribeye Area EPD (REA) Ribeye area is measured from a cross-sectional area of the longissimus dorsi muscle at the 12th rib. Ribeye area is a major component of the USDA yield grade equation and selection for increased ribeye area should result in larger ribeyes and lower yield grades between animals with the same carcass weight. Ribeye area has a positive relationship with weight, the larger the animal the larger the ribeye area. Ribeye Area EPD are expressed in square inches and is a predictor of differences in ribeye area between parents progeny at a constant age endpoint. • Fat Thickness EPD (FAT) Fat thickness is measured at the 12th rib and is the primary component to the USDA Yield Grade equation. Fat thickness has a negative relationship to cutability; therefore, selection base on decreased fat thickness should result in lower yield grades and leaner cattle given the same age endpoint. Fat Thickness EPD are expressed in inches and are a predictor of differences in fat thickness between parent’s progeny at an age constant endpoint. • Marbling Score (MARB) Marbling is a subjective measure of the amount of intramuscular fat in the ribeye muscle. Marbling score is the primary component of USDA Quality grade and selection for increased Marbling Score EPD should result in cattle with higher quality grades at the same age endpoints. Marbling score has a small genetic correlation with fat, therefore producers may select for increased marbling score EPD while not changing external fat thickness when cattle are harvested at the same age-constant endpoint. Marbling EPD is a prediction of the differences in the USDA subjective marbling score between parent’s progeny at an age constant endpoint. Marbling is expressed in the same units as the USDA Marbling Score (see table below), see the accompanying table for USDA Marbling Score in the Carcass Section. • Terminal Sire Index (TSI) The AICA Terminal Sire Index (TSI) is a formal method of combing Expected Progeny Differences (EPD) – BW, WW, YW, REA, CW, MARB and FAT – into one single value on which to base selection decisions. The TSI uses estimates of the genetic relationships between traits with an economic default value based on three year rolling USDA data. • The TSI represents a dollar index per terminal progeny produced for a bull in the AICA database, ranking them for profit potential. This dollar index is to be interpreted much like single trait EPD. For example, if Sire A’s index is $191.66 and Sire B’s index is $200.00, then we would expect Sire B’s offspring to average $8.34 more net return ($200.00 minus $191.66) than Sire A’s offspring.
58
SWCC TURTON 5111
PB Charolais• DOB: 2/18/25•AICA# N/R
ACT BW 81 BWR ADJ WW 670 WWR ADJ YW 1167 YWR
TR MR FIREWATER 5792 ET
TR/PZC MR TURTON 0794
THOMAS MS IMPRESSIVE 0641
WELLS MISS MIMI 9724 JBJ BLIZETTE 724 JDSF JR PLATINUM 20K
CE BW WW YW Milk ME RE BFAT TSI %RK 8.6 0.8 59 103 31 7.7 0.79 0.013 256 56 These two Charolais bulls are consigned by Sioux Warrior Cattle Com- pany and are full sibling ET bulls just separated by one year birth. Lot 58 is an attractive, strong topped, soggy middled, and fleshy.
59
SWCC TURTON 475
PB Charolais• DOB: 2/12/24•AICA# N/R
ACT BW 80 BWR ADJ WW 684 WWR ADJ YW 1118 YWR
TR MR FIREWATER 5792 ET
TR/PZC MR TURTON 0794
THOMAS MS IMPRESSIVE 0641
Lot 58
WELLS MISS MIMI 9724 JBJ BLIZETTE 724 JDSF JR PLATINUM 20K
Homestake Ranch 12 th Annual Production Sale • February 25,2026 • 1pm @ Huron Continental Marketing • 23 • CE BW WW YW Milk ME RE BFAT TSI %RK 8.6 0.8 59 103 31 7.7 0.79 0.013 256 56 475 is the only 2-year old in the sale this year. He was held back to go in SWCC’s show pen. This bull is out of the well-known Turton bull of Thomas Ranch. His dam was full sister to the 2005 BHSS Grand Champion female. He is long bodied, wide based, and thick as they come.
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