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GSG-Cow-Quartile-table-2013.jpgThe GSG Cow Report divides the herd into four quartiles. Quartile averages for NM$ are listed in Block A of the report. Block C provides information on the individual cows. As shown in the sample Cow Report in Figure 2, NM$ values are highlighted according to the cow's ranking. Blue is Quartile 1, yellow indicates Quartile 2, and orange and red represent Quartiles 3 and 4 respectively.

In addition to the NM$ value, if the cow's genetic information is based on genomic data, either a "G1", "G2" or "G3" genomic indicator will be listed next to the NM$ value. To make the decision process more complete each cow record includes milk, fat and protein production compared to the rest of the herd along with average Linear Score based on SCC, reproductive performance based on her average days open and her Transition Cow Index® if the herd is on a TCI option. If Dam production information was available, then milk, fat and protein production compared to the rest of the herd for the Dam will be listed as well.

The GSG and all other AgSource reports are available on MyAgSource. Information can be sorted, exported and is available whenever you need it online. Click here to see the demo page for the Genetic Selection Guides for cows. 

Figure 2) Example GSG Cow Report

Click a section of the report to learn more. 

Block ABlock BBlock C
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Genetic Selection Guide - Cow Definitions

Block A

All cows are divided into quartiles based on their NetMerit$. The average NM$ for each quartile is listed. The highest 25% (Quartile 1) have a light blue background, the second highest 25% have a yellow background and the bottom two quartiles are orange and red. This color coordination is followed throughout Block C.

The paper reports are generated starting a week after each USDA genetic evaluation in April, August and December. The Genetic Selection Guide, with all fields updated, will be mailed with the test day reports for the first test following the genetic evaluation.

Block B

Comment Box - Refer to this block for news and updates from AgSource.

Block C

First four columns - Four types of identification are listed. Herds electing to stay on the paper report may choose whether to sort their cows by visible ID (default), barn name or control number.

Lact Num

This is the current lactation number for this cow.


NM$ is the additional lifetime profit an animal is expected to make compared to an average animal (average animal = 0 NM$). The profit function approach used in deriving NM$ lets breeders select for many traits by combining the incomes and expenses for each trait into an accurate measure of overall profit. The reliability of a cow's NM$ increase 1.5% with every additional lactation. On the Cow Genetic Selection Guide you may see asterisks (*) after certain NM$ values. These are first lactation animals that calved after the most recent USDA sire proofs were run. The asterisk signifies that her NM$ value is an estimated one = (Her sire's NM$ + Her dam's NM$) / 2. After the next USDA sire proofs are run, these animals will have their own NM$ values and the asterisks will disappear from their records.

Genomic Indicator
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The genomic indicator identifies if the genetic proof includes information derived from genomic testing of the animal itself, its ancestors, or progeny. Cow NM$ values that include genomic information would have higher reliability compared to cows not genomically tested.

G1: Animal was genotyped and evaluation was computed using its genotype.
G2: Evaluation includes information from genotypes (or imputed genotypes) of ancestors, but the animal was not genotyped.
G3: Animal's genotype was imputed from progeny and the imputed genotype was used in the evaluation.
GU: Genomics Unknown.

Due Date If a pregnancy confirmation has been recorded with AgSource, the cow's due date will show up here.

Avg Dev From Herd 305 ME

Adjusting production records with Mature Equivalent 305 day factors creates a level playing field for comparing different aged cows with lactations longer than 305 days.

The Milk, Fat and Protein average deviations from herd 305 day Mature Equivalent are calculated on a lactation by lactation basis. For example, if a cow has three lactations, her first lactation's 305 day ME production is compared against her herdmates' 305 day ME production in the same year. The same is done on each of her subsequent lactations. Her 305 ME projection is used on lactations in progress. Then the production deviations for each lactation are averaged to create the values displayed in these columns.

Avg Days Open

This column contains the average days open of all lactations for the cow listed. Herd owners who do not report pregnancy confirmations will have blanks in this column. First lactation dams that do not have a pregnancy confirmation will not have any value for days open. As a comparison of individual animals to a herd average, Block I of the Herd Summary has the herd's current average "Days Open, PG".

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Avg LS

Average Linear Scores are calculated by converting each cow's end of lactation average SCC to a Linear Score and then averaging all the lactation Linear Scores. The industry average Linear Score is very close to 2.7.

Avg TCI®

The Transition Cow Index® has a genetic component much like SCC does. It is also a measure of a cow's resilience. Only those herds on a TCI option will have information in this column. For those members receiving a Fresh Cow Summary, their herd's average TCI is in Block A.


Sire and Maternal Grandsire NAAB numbers and the Dam's ID are listed. If any of these fields are blank or incorrect, provide your Field Technician with the correct data or call AgSource Customer Service at 800-236-4995.

Dam Production Data

Many times the "Dam Production" columns will be blank. Generally, the reason is that the cow has not been tested for the past five years and her records have been archived. Another possible reason is the dam or the animal herself may have been purchased and AgSource never received earlier records.