Page 11 - Heart River Ranch and Open A Angus Bull Production Sale – March 9, 2022
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Reference Sires                                        Quality Genetics Built on a Heritage of Commitment – 9


          RED ANGUS GUIDE TO EPDS                              YW ........Yearling Weight predicts differences in 365-day yearling weight.
                                                               (Pounds/High Value)
                          RedAngus.org                         ADG .......Average Daily Gain predicts differences in weight gain between 205 and
                                                               365 days of age. (Pounds/High Value)
          ProS .....Profi tability and Sustainability is an all-purpose index that predicts average   DMI .......Dry Matter Intake predicts differences in daily feed intake as measured in
          economic differences in all segments in the beef supply chain. This index is a   a feedlot during the post-weaning period. (Pounds/Low Value)
          combination of the breeding objectives modeled in the HerdBuilder and GridMaster
          selection indexes. In this index, replacement heifers are retained from within the   MILK .....Milk predicts differences in weaning weight attributed to the milking
          herd and all remaining progeny are fed out to slaughter and sold on a quality-based   ability of the animal’s daughters. (Pounds/High Value)
          grid. Traits included in this index include calving ease, growth, HPG, STAY, Mature
          Weight, Dry Matter Intake and carcass traits. The resulting index is expressed in   ME ........Maintenance Energy predicts the difference in maintence energy
          dollars per head born (Index/High Value).            requirements. (Mcal per Month/Low Value)
          HB .......HerdBuilder is a maternal selection index that predicts the economic   HPG .......Heifer Pregnancy predicts differences in the percent of daughters who
          differences of animals for traits that are important from conception through   are able to conceive and calve at 2 years of age following exposure to breeding.
          weaning. Expressed as dollars per head born, HB is calculated based on the scenario   (Percent/High Value)
          that bulls are mated to heifers and cows, replacement heifers are retained and all   CEM ......Calving Ease Maternal predicts differences in the percent of daughters
          remaining progeny are marketed at weaning. Traits included in the HB index include   who are able to calve unassisted as 2-year-old heifers. (Percent/High Value)
          Calving Ease Direct, Calving Ease Maternal, Weaning Weight, Milk, Mature Weight,
          Heifer Pregnancy and Stayability (Index/High Value).  STAY......Stayability predicts differences in the ability of an animals’ retained
          GM.......GridMaster is a selection index that predicts the average economic   daughters to remain productive in the herd – calve every year – through 6 years of
          difference of non-replacement calves through the post-weaning phase of production.   age. (Percent/High Value)
          GM places selection pressure on growth, feedyard performance and carcass traits.   MARB ....Marbling predicts differences in marbling score – amount of
          Expressed as dollars per head born, GM is calculated based on the scenario that   intramuscular fat measured at the 13th rib. (Marbling Score Units/High Value)
          progeny are fed out to slaughter and marketed on a quality-based carcass grid.
          Traits included in GM include Average Daily Gain, Carcass Weight, Dry Matter Intake,   YG .........Yield Grade predicts differences in USDA Yield Grade, which is calculated
          Marbling, Back Fat and Rib Eye Area (Index/High Value).  using CW, REA and Fat. (Yield Grade Units/Low Value)
          CED ........Calving Ease Direct predicts differences in the percent of calves born   CW ........Carcass Weight predicts differences in actual hot carcass weight.
          unassisted out of 2-year-old dams. (Percent/High Value)  (Pounds/High Value)
          BW ........Birth Weight predicts differences in actual birth weight of progeny.   REA .......Ribeye Area predicts differences in square inches of ribeye area
          (Pounds/Low Value)                                   measured at the 13th rib.(Square Inches/High Value)
          WW .......Weaning Weight predicts differences in 205-day weaning weight.   FAT ........Fat predicts differences in the depth of backfat measured between the
          (Pounds/High Value)                                  12th and 13th ribs. (Inches/Low Value)




           AMERICAN ANGUS ASSOCIATION SELECTION TOOLS  Maternal Milk (Milk), is a predictor of a sire’s genetic merit for milk and mothering  $VALUE INDEXES
                                              ability in his daughters compared to daughters of other sires. In other words, it is   $Value Indexes, reported in dollars per head, are multi-trait economic selection
           Expected Progeny Difference (EPD), is the prediction of how future progeny of   that part of a calf’s weaning weight attributed to milk and mothering ability.   indexes where a higher values suggest more profit when comparing two individuals.
           each animal are expected to perform relative to the progeny of other animals listed  Mature Weight (MW), expressed in pounds, is a predictor of the difference in   Maternal Weaned Calf Value ($M), expressed in dollars per head, predicts prof-
           in the database. EPDs are expressed in units of measure for the trait, plus or minus.   mature weight of daughters of a sire compared to the daughters of other sires.   itability differences in progeny from conception to weaning by decreasing mature
           Accuracy (ACC), is the reliability that can be placed on the EPD. An accuracy of   Mature Height (MH), expressed in inches, is a predictor of the difference in mature  cow size and improving docility, foot structure and fertility while maintaining
           close to 1.0 indicates higher reliability. Accuracy is impacted whether the animal   height of a sire’s daughters compared to daughters of other sires.  weaning weights consistent with current production.
           has a genotype and the number of progeny and ancestral records included in the   Weaned Calf Value ($W), expressed in dollars per head, provides the expected
           analysis.                          MANAGEMENT                        difference in future progeny preweaning performance from birth to weaning.
           Calving Ease Direct (CED), is expressed as a difference in percentage of unassisted  Docility (DOC), is expressed as a difference in yearling cattle temperament, with   Cow Energy Value ($EN), is expressed in dollar savings per cow each year due to
           births, with a higher value indicating greater calving ease in first-calf heifers. It   a higher value indicating more favorable docility in a sire’s offspring compared to   lower cow maintenance energy requirements (due to lactation and body size) with a
           predicts the average difference in ease with which a sire’s calves will be born when  another sire.   larger number being more favorable.
           he is bred to first-calf heifers.   Claw Set (Claw), is expressed in units of claw-set score, a lower EPD is more   Feedlot Value ($F), expressed in dollars per head, is the expected average
           Birth Weight (BW), expressed in pounds, is a predictor of a sire’s ability to transmit  favorable, indicating a sire will produce progeny with more symmetrical, even and   difference in future progeny performance for postweaning feedlot merit (growth
           birth weight to his progeny compared to that of other sires.   appropriately spaced toes.  and feed efficiency) compared to progeny of other sires assuming producers retain
           Weaning Weight (WW), expressed in pounds, is a predictor of a sire’s ability to   Foot Angle (Angle), is expressed in units of foot-angle score, a lower EPD is more   ownership of cattle and sell on a carcass weight basis.
           transmit weaning growth to his progeny compared to that of other sires.   favorable, indicating a sire will produce progeny with an angle closer to 45 degrees  Grid Value ($G), expressed in dollars per carcass, is the expected average
           Residual Average Daily Gain (RADG), feed efficiency expressed in pounds per   at the pastern and appropriate toe length and heel depth.  difference in future progeny performance for carcass grid merit, including quality
           day, is a predictor of a sire’s genetic ability for postweaning gain in future progeny   Pulmonary arterial pressure EPD (PAP), is expressed in millimeters of Mercury   and yield grade attributes, compared to progeny of other sires.
           compared to that of other sires, given a constant amount of feed consumed.   (mmHg), with a lower EPD being more favorable indicating a sire should produce   Beef Value ($B),  expressed in dollars per carcass, represents the expected average
           Yearling Weight (YW), expressed in pounds, is a predictor of a sire’s ability to   progeny with a lower PAP score to decrease the risk of progeny contracting high   differences in the progeny postweaning performance and carcass value compared
           transmit yearling growth to his progeny compared to that of other sires.   altitude disease most commonly experienced at 5,500 ft or greater in elevation.  to progeny of other sires. This index assumes commercial pro ducers wean all male
           Yearling Height (YH), is a predictor of a sire’s ability to transmit yearling height,   and female progeny, retain ownership of these animals through the feedlot and sell
           expressed in inches, compared to the that of other sires.  CARCASS   on a carcass merit grid.
           Scrotal Circumference (SC), expressed in centimeters, is a predictor of the   Carcass Weight (CW), expressed in pounds, is a predictor of the differences in hot  Combined Value ($C), an index, expressed in dollars per head, includes all traits
           difference in transmitting ability for scrotal size compared to that of other sires.   carcass weight of a sire’s progeny compared to progeny of other sires.   that make up both $M and $B with the objective that commercial producers will
                                              Marbling (Marb), is expressed as a fraction of the difference in USDA marbling   replace 20% of their breeding females per year with replacement heifers retained
           MATERNAL                           score of a sire’s progeny compared to progeny of other sires.   within their own herd. The remaining cull heifer and steer progeny are then assumed
           Heifer Pregnancy (HP), is a selection tool to increase the probability or chance of   Ribeye Area (RE), expressed in square inches, is a predictor of the difference in   to be sent to the feedlot where the producers retain ownership of those cattle and
           a sire’s daughters becoming pregnant as first–calf heifers during a normal breeding  ribeye area of a sire’s progeny compared to progeny of other sires.   sell them on a quality-based carcass merit grid.
           season. A higher EPD is more favorable.   Fat Thickness (Fat), expressed in inches, is a predictor of the differences in
           Calving Ease Maternal (CEM), is expressed as a difference in percentage of   external fat thickness at the 12th rib (as measured between the 12th and 13th ribs) of
           unassisted births, with a higher value indicating greater calving ease in first-calf   a sire’s progeny compared to progeny of other sires.
           daughters. It predicts the average ease with which a sire’s daughters will calve as
           first-calf heifers when compared to daughters of other sires.
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