Load 5-generation pedigrees from CSV, analyze linebreeding & dosage, save results
This tool allows you to load horse pedigrees, analyze linebreeding patterns, calculate dosage profiles, view winning descendants, analyze discipline tendencies, find half-siblings, and trace female tail lines. Reports can be saved as PDF, text, or CSV files.
There are three ways to load a pedigree:
qhr_proxy.php to be present on the server in the same folder.AllBreedPedigree provides comprehensive pedigree data. Follow these steps:
Measures how strongly this pedigree's bloodlines are associated with each discipline using an over/under-representation ratio — a method that gives accurate results regardless of how many horses of each type are in your database.
How it works: For each ancestor in the pedigree (all 5 generations), the system scans your database and asks: "What fraction of heading horses carry this ancestor? What fraction of heeling horses? Barrel racers?" Each fraction is then divided by the overall fraction across the entire database. A ratio of 1.0 means the ancestor appears in that discipline at exactly the database average rate. A ratio of 1.5× means 50% more common in that discipline than average — a genuine tendency signal. Ratios below 1.0 indicate under-representation.
Generation weighting: Closer ancestors carry more weight since they represent intentional breeding decisions. Gen 1 (parents) are weighted 16×, Gen 2 eight times, Gen 3 four times, Gen 4 twice, and Gen 5 once. This means a direct sire with a strong heading association will dominate the result far more than a distant Gen 5 ancestor.
Minimum carrier threshold: To prevent rare ancestors shared by only one or two horses from inflating ratios artificially, an ancestor must appear in at least 5% of a discipline's horse pool before it contributes to that discipline's score. This threshold scales with pool size — for example, a discipline with 300 horses requires at least 15 carriers, while a smaller discipline with 58 horses requires at least 3. Ancestors below the threshold are ignored for scoring but may still appear in the Tendency Detail panel.
Discipline classification: Horses are classified by their discipline and champion fields. Futurity horses (discipline=t) use the champion field to identify their event. Open breakaway horses must have discipline=n with no champion value — horses with other discipline codes are not counted as breakaway even if they have a breakaway champion code.
Reading the results:
Tendency strength labels: Any ratio above 1.0 is a genuine tendency; below 1.0 means not favoured. Results above 1.0 are further labelled — Slight (1.0–1.25×), Moderate (1.25–1.75×), Strong (1.75–2.5×), Very Strong (>2.5×). A ratio of 1.48× means those bloodlines appear 48% more often in that discipline than the database average — labelled Moderate. The bar width scales relative to the highest ratio in the current result set.
Tendency Detail panel: A collapsible panel at the bottom of the results shows exactly which ancestors are driving each discipline's score, which generation they appear in, their individual ratio, and the names of the database horses that carry them. Useful for verifying results and understanding why a particular tendency is showing.
This method correctly handles databases with uneven discipline representation — a database with 288 heading horses and 38 reining horses will still produce accurate tendency signals for both disciplines.
Finds horses in your database that share the same sire or same dam as the selected horse. This is useful for:
Results are split into two groups: "Same Sire" and "Same Dam", showing each sibling's discipline and their other parent.
Traces the bottom female line of the pedigree (D → DD → DX → Q → QQQQ2) and finds other horses in your database that share this maternal ancestry. The system:
This helps identify maternal family lines that consistently produce winners.
| Ctrl+Shift+L | Highlight any horse name, then press to open their pedigree on AllBreedPedigree.com |
| Ctrl+Shift+D | Highlight any horse name, then press to search for descendants in your database |
The system recognizes these discipline codes in your data:
CSV with horse pedigrees to load from
For searching descendants & relatives
For dosage profile calculation
Type a registered AQHA horse name and fetch the full 5-generation pedigree directly from Quarter Horse Resource. No CSV needed.
Go to allbreedpedigree.com, find the horse, then save the page (Ctrl+S → HTML Only). Load that file here.
Load a previously saved horse CSV (single horse or multi-horse collection) to select from the dropdown below.
Descendants found in pedandfut.csv for Gen 1-4 ancestors
Analysis of what disciplines descendants of this pedigree excel in
Horses sharing the same sire or dam
Tracing the bottom female line to find related horses
Tracing the top sire line to find related horses
Horses in database sharing the same sire-line × dam-line cross
Save this horse's pedigree and info. Files download to your browser's download folder.