
Kentucky Derby start time:
Post time for the 151st running of the Kentucky Derby is 7:02 p.m. ET on Saturday, May 3.
Although the theme song of the TV show Mr. Ed tried to tell us all differently (“A horse is a horse, of course, of course…”), s0 a horse is not just any horse where Thoroughbreds are concerned. S0 I’m taking you way back to explore the “founding fathers” of the modern Thoroughbred racehorse.
Thoroughbred horses have minutely monitored family trees—called pedigrees—that allow their breeders, owners, and trainers to prove one very important fact: that every horse registered as a Thoroughbred must be able to trace its lineage far back to three influential horses, called “foundation sires.”
The Darley Arabian, the Godolphin Arabian, and the Byerly Turk landed on English soil from the Middle East in the seventeenth century, imported by three savvy horsemen intent on improving the native English breed.
Likewise, in 1730, another horseman sent a Thoroughbred named Bulle Rock—bred from the Darley Arabian and a Byerly Turk mare—to the colony of Virginia for the purpose of creating a faster, stronger, American-bred equine family.
Over the next century over 300 more imported Thoroughbreds would reach America to found dynasties of their own, many establishing kingdoms in the Bluegrass region of what would soon be the Commonwealth of Kentucky.



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The Darley Arabian
The Godolphin Arabian
The Byerly Turk
Julie Wear, 1991
Oil on canvas
Kentucky Derby Museum Permanent Collection
Godolphin’s Kentucky Derby hope! SOVEREIGNTY comes from last to first in 2025 Fountain of Youth! / The ancestry of thoroughbred horses can be traced back to one of three ‘foundation’ sires – the Darley Arabian, the Godolphin Arabian and the Byerly Turk. 1. Sovereignty is a serious Kentucky Derby contender 2 5 . He has a combination of tactical speed and finishing power that makes him a classic prospect 2 . Sovereignty is the initial stakes runner produced from the unraced Bernardini mare Crowned, 3 who is out of Grade-1 winning millionaire Mushka 1 4 .
Sovereignty wins the 151st running of the Kentucky Derby – NewsBreak
Over a century and a half after Bulle Rock reached American shores, fifteen horses went to post in the inaugural Kentucky Derby, held at the new Louisville Jockey Club course in Louisville, Kentucky on May 17, 1875. Each of the fifteen sported impressive pedigrees that included the names of the greatest sires in American history somewhere in their charts: thirteen could claim descent from Sir Archy (occasionally spelled “Archie”), twelve claimed Boston, nine claimed Lexington, and so on.
But all of them, through the many generations of sires and dams that came before, still carried the blood of those three stallions from the Middle East, by way of Britain.
Those bloodlines lived on in the twentieth century equine heroes and heroines of the Kentucky Derby. The 1926 first and second place finishers, Bubbling Over and Bagenbaggage, were bred by E. R. Bradley at his Idle Hour Stock Farm. One of Bradley’s most prolific and influential sires, Black Toney, would produce Derby winners Black Gold (1924) and Brokers Tip (1933).
Regret, the first filly to win the Kentucky Derby in 1915, came from another important sire line in Derby history. Her sire, Broomstick, was the progeny of Ben Brush, winner of the 1896 Kentucky Derby. Ben Brush’s line runs back to other Thoroughbreds, like: Bramble, Bonnie Scotland, Leamington, Eclipse, and Lexington. And, of course, the Darley and Godolphin Arabians and the Byerly Turk.
What Are The Three Sires The Thoroughbred Ancestry Traces Back To?
Published by Clayton Newton on November 29, 2022
Most racehorses traced back to single ancestor
Science Editor, Steve Connor
Do All Thoroughbred Horses Have A Common Ancestor? – Great American Adventures
A genetic analysis of more than 200 thoroughbreds and a computer check of a million race-horse pedigrees has confirmed the highly inbred status of the modern racing champion.
Professor Patrick Cunningham of Trinity College, Dublin, said a combination of modern molecular genetics and a trawl through 300 years of pedigree stud books has identified the key ancestors of the half-million thoroughbreds in the world today.
Scientists trace origin of ‘speed gene’ in modern racehorses to a British mare of 300 years ago. One stallion, a bay colt called the Darley Arabian, stands out.
The study found that his Y chromosome, which carries the male genes, is found in 95 per cent of modern thoroughbred stallions. The Darley Arabian was born in 1700 and brought to England from Syria in 1704 by the British consul of the day, Thomas Darley, who made the stallion into a champion stud.
A mare called Tregonwell’s Natural Barb contributed the largest proportion – 14 percent – of the genes passed down the female line of racehorses, Professor Cunningham told the British Association’s Festival of Science in Dublin. By analysing the pedigree status of all horses registered in the General Stud Book over the past three centuries, Professor Cunningham found that a small number of stallions began to emerge as the founders of the male line.
“In the early days there was some jockeying for position between the early stallions but after about 70 years, some dropped away and three survived,” he said. The three stallions found to contribute most of the genes to today’s stallions were the Darley Arabian, the Byerley Turk and the Godolphin Barb, “and eventually the Darley Arabian raced to supremacy,” Professor Cunningham told the conference.
The findings came out of a wider scientific investigation into the genetics of the thoroughbred racehorse, the origin of which began when about 80 horses from the Middle East and North Africa were imported into England for breeding. An analysis of the pedigree status and the DNA of about 211 race horses showed that most of the genes of this original group of 80 have been lost over time, Professor Cunningham said.
“The effective number of founders was about 28 – there were about 28 horses contributing pretty well to all the genes in today’s population, that’s despite the fact that there were about 80 horses recorded in the first stud book,” he said. “We’ve been able to measure the contribution of these founders to today’s population and the top 10 contribute about 80 per cent of the genes,” he said.
“We’ve measured the inbreeding over that time and there’s about a 15 per cent accumulation of inbreeding. For every two horses in our sample we were able to get a molecular measure of their relationship. It turned out that on average that was 47 per cent, so any two horses share 47 per cent of their genes,” he said.
Virtually all 500,000 of the world’s thoroughbred racehorses are descended from 28 ancestors, born in the 18th and 19th centuries 2. Up to 95% of male thoroughbreds can be traced back to just one stallion 2.
Researchers have claimed that all the best thoroughbreds of racing are very distantly related after tracing the ‘speed gene’ they all share to a single ancestor from the 17th century 3. These Arabian horses were imported into England between the late 17th and early 18th Century by gentlemen who wanted to breed better racehorses.
What are the three major bloodlines of horses?
THREE BLOODLINES THAT SHAPED HORSE RACING. History states that Henry VIII, his daughter, Elizabeth 1, and then the subsequent Stewart monarchs, had over time laid down rules and regulations to govern the breeding of horses and the records of which sire mated with which mate to produce which offspring.
What are thoroughbreds descended from?
All modern Thoroughbreds trace back to three stallions imported into England from the Middle East in the late 17th and early 18th centuries: the Byerley Turk (1680s), the Darley Arabian (1704), and the Godolphin Arabian (1729).
What are foundation sires names?
Foundation Sires. Breed histories of the Thoroughbred often focus on the three foundation sires — the Byerley Turk, Darley Arabian, and Godolphin Arabian — who were brought to England in the late seventeenth and early eighteenth centuries and crossed on English and imported mares.
Are there any horses with Secretariat bloodline?
Today, there are two living Secretariat offspring: 34-year-old Border Run and 33-year-old Trusted Company, both of whom celebrated birthdays on Jan. 1, reports Thoroughbred Racing Commentary.
What is the best bloodline horse?
When it comes to breeding, there are multiple ranch and Quarter horse bloodlines famous for producing top-quality horses. Seven of the most famous ranch and quarter horse bloodlines are Doc Bar, Driftwood, Two Eyed Jack, Joe Hancock, Playgun, Old Sorrel, and Peppy San Badger.
What are the 3 types of cowboy horses?
In the old west, cowboys rode all kinds of different breeds, but some were more popular than others-quarter horses were by far the favorite because of their speed, athletic ability, and hardiness. Other common breeds included the Appaloosa, Morgan, and American Quarter Horse.
What two breeds make a Morgan horse?
The founding stallion of the breed was a horse named Figure, owned by Vermont schoolteacher Justin Morgan in the late 1700s. No one knows for certain what Figure’s pedigree was, but it’s generally accepted that it was the offspring of horses with Arabian, thoroughbred, and perhaps Welsh cob or Friesian bloodlines.

Secretariat Heart Of A Champion
this is a short documentary on the amazing Secretariat who will be forever remembered!
What bloodline was Secretariat from?
Secretariat was sired by Bold Ruler and his dam was Somethingroyal, a daughter of Princequillo.
Bold Ruler was the leading sire in North America from 1963 to 1969 and again in 1973.
What breeds make up a Thoroughbred horse?
The term Thoroughbred describes a breed of horse whose ancestry traces back to three foundation sires — the Darley Arabian, the Godolphin Arabian and the Byerly Turk.
Are Thoroughbreds descended from Arabians?
The key to the Thoroughbred’s greatness is its speed and endurance, for which it has been bred for over 300 years. The Thoroughbred originated in Great Britain and its genetic origin is Arabian. The “foundation” stallions of the breed were: the Byerly Turk, the Darley Arabian and the Godolphin Arabian.
Do Thoroughbreds have Arabian in them?
One of the hard and fast rules of the Thoroughbred breed is that a registered horse must have descended from one of three foundation sires: The Darley Arabian, the Godolphin Arabian, or the Byerley Turk.
What are the 3 types of foundations?
There are three main foundation types: full basement, crawl space and concrete slab.
What are the three parts of a foundation?
First, the footing is placed. Second, the walls are constructed and poured. Lastly, the slab is placed.
What are the 4 types of foundation?
- Types of Foundation and their Uses.
- Spread footings or Strip footings and Wall footings.
- Raft or Mat Foundations.
- Pile Foundations.
- Drilled Shafts or Caisson Foundation.
Who owned Secretariat when he died?
Helen “Penny” Chenery, owner of 1973 Triple Crown winner Secretariat and a well-loved figure in her own right as a champion of Thoroughbreds and women in business and sports, died Sept. 16, in her Colorado home following complications from a stroke. She was 95.
Who is Secretariat’s most famous offspring?
Secretariat is best known for his daughters and in 1992 was the leading sire of broodmares in North America. The most successful racehorse he ever produced was Lady’s Secret, a multiple stakes winner that won an Eclipse Award as horse of the year.

Sovereignty is a fifth-generation descendant of Secretariat,
and just won this year’s Kentucky Derby
Is the Secretariat buried whole?
Secretariat, Mr. Prospector, Round Table, Nijinsky and Swale are all buried whole. Even more rare than being buried whole, Secretariat and Man O’ War were both embalmed as well. Secretariat’s last footage.
10 Things you didn’t know about Secretariat
And of course, this horse went Last to First Secretariat – Preakness Stakes
We all know Secretariat is Truly Epic, but let’s not forget how good of a horse Sham was.
Who was the greatest racehorse sire of all time?
No. 1: First Down Dash, $89,707,366. Inducted into the American Quarter Horse Hall of Fame in 2011, First Down Dash is arguably the greatest race sire of all time. From 31 crops to race, First Down Dash has sired 1,462 winners, which includes 258 stakes winners.
What is the rarest horse breed on earth?
The rarest horse breeds in the world are the Sorraia, Nokota Horse, Galiceño, Dales Pony, and the Choctaw Indian Pony. There are less than 250 of each of these horse breeds globally, making them critically endangered. Conservation efforts are currently ongoing to try and save these endangered horse breeds.
15 Greatest Race Horses That Have Ever Graced Our Planet !
🏇 Greatest Horse Races: Legends of the Turf Unveiled! 🏇 Watch our “Top 10 Legendary Racehorses of the 21st Century!” video here: • Top 10 Legendary Racehorses of the 21st Century | Unforgettable Champions and Their Stories – YouTube
🔥 #HorseRacingHistory #EquestrianTales 🔥 Seabiscuit – Dive into Seabiscuit’s legacy, an emblem of American horse racing.
Witness how this underdog inspired a nation during its toughest times, showcasing the #PowerOfPerseverance.
Red Rum – Relive the drama of the British Isles with Red Rum, a symbol of endurance and #TripleCrown aspirations. Discover the legend that left the world in awe.
Spectacular Bid – Step into the vibrant 70s, unveiling Spectacular Bid’s thrilling escapades. With unmatched prowess, this #RacingProdigy changed the course of horse racing.
Kincsem – Venture into Europe’s rich tapestry with Kincsem, the unbeatable mare. Explore her tales that made her a horse racing sensation, setting the #GoldStandard in equestrian performances. Sea Bird – Experience the beauty of French racing history with Sea Bird. His tales of sheer excellence are a testament to the #EleganceOfHorseRacing.
Makybe Diva – Celebrate Makybe Diva, the pride of Australia’s horse racing scene. Dive deep into her unmatched legacy, an epitome of #EquestrianBrilliance.
Seattle Slew – Relish the legacy of Seattle Slew, a 70s icon who combined grace with unmatched power, marking his name in the #HorseRacingHallOfFame.
American Pharoah – Explore the tales of American Pharoah, who not only clinched titles but also captured hearts, showcasing #RacingRoyalty at its finest. Cigar – Step into the 90s with Cigar, whose victories and global appeal reshaped the #WorldOfHorseRacing.
Zenyatta – Experience Zenyatta, the equine queen of the 21st century. Her tales of drama and determination have redefined #EquestrianLegends.
Phar Lap – Explore Phar Lap’s mystique, whose tales of victories and undying spirit remain a cornerstone in the #EpicsofEquine.
Black Caviar – Celebrate the tales of Black Caviar, Australia’s sprinting sensation, setting #RacecourseRecords that still dazzle.
Frankel – Dive into the modern legends with Frankel, the UK’s unbeaten marvel, a testament to #BritishHorseRacing supremacy.
Man o’ War – Revel in the tales of Man o’ War, a timeless icon, and discover why he remains the #EquineGoldStandard.
Secretariat – Stand in awe of Secretariat, the ultimate racing legend, whose tales of unmatched brilliance resonate in every #RacingChronicle.
Thoroughbreds get their speed from just a few ancestors
Conclusion: From the racecourses to legends, these titans have left legacies that inspire.
Relive these tales of determination, brilliance, and unparalleled spirit.
#ThoroughbredHeroes #EquineEpics #RacecourseRoyalty #TurfTitans #GallopingGlory 🌌🏇
Legends of Horse Racing: TOP 10 Greatest Thoroughbreds of All Time
Horse racing, a sport steeped in tradition and adrenaline, has witnessed the rise of numerous extraordinary athletes over the years. Among them, a select few have etched their names into the annals of history as the greatest thoroughbreds to ever grace the tracks. In this video, we embark on a thrilling journey through time to uncover the top 10 legendary horses whose feats of speed, endurance, and sheer brilliance have captivated the hearts of racing enthusiasts worldwide.
👉 Get expert race tips & strategies here: https://topracetips.com/ 🐴: Spectacular Bid, Black Caviar, Zenyatta, Frankel, Seabiscuit, Citation, Deep Impact, Phar Lap, Man o’ War, Secretariat
Legends of Horse Racing: TOP 10 Greatest Thoroughbreds of All Time
HORSES WHO NEVER LOST A SINGLE RACE IN THEIR WHOLE LIFE.
Peppers Pride – Unmatched Perfection in New Mexico 🇺🇲 Discover Peppers Pride, the embodiment of resilience and excellence in horse racing. 🏇✨ Born in New Mexico, she captured hearts with a perfect record of 19 wins, becoming a local legend. A beacon of perfection, her story is a testament to the pursuit of excellence. #PeppersPride #PerfectRecord #RacingLegend
Personal Ensign – The Epitome of Will and Perfection 🇺🇲 Celebrate Personal Ensign, a symbol of undying will and racing perfection. 🌟🐴 With 13 wins from 13 starts, her dramatic victory in the 1988 Breeders’ Cup Distaff left an indelible mark on the sport. Her legacy lives on, inspiring both fans and future generations. #PersonalEnsign #UndefeatedLegend #HorseRacingHistory
Ribot – European Racing’s Unparalleled Legend Honor Ribot, the unparalleled legend of European horse racing. 🏆🇬🇧 With a flawless record of 16 wins, his back-to-back Prix de l’Arc de Triomphe victories showcase his exceptional talent. Ribot’s legacy as one of the greatest racehorses endures through his significant impact on the sport. #Ribot #RacingPerfection #LegendaryRacehorse
Black Caviar – Australia’s Racing Titan Witness the legendary Black Caviar, Australia’s titan of horse racing. 🇦🇺🏇 Her unmatched 25 wins from 25 starts, including a triumphant victory at Royal Ascot, have captivated the world, making her an icon of sporting perfection and a beloved figure in racing folklore. #BlackCaviar #AustralianLegend #RacingIcon
Frankel – The Embodiment of Racing Perfection Behold Frankel, the pinnacle of racing perfection and equine excellence. 🌟🏇 Born in Great Britain, 🇬🇧 his legendary unbeaten record of 14 wins has set him apart as the greatest racehorse of his generation, captivating fans worldwide with his power and speed. #Frankel #RacingGreatness #UnbeatenLegend
Join us in celebrating these incredible stories of undefeated racehorses, whose legacies of perfection and resilience continue to inspire and awe. Which legend amazed you the most? Share your thoughts and join our community of horse racing enthusiasts. Don’t forget to like, subscribe, and support our journey through the annals of horse racing history. #UndefeatedRacehorses #HorseRacingLegends #subscribeformore
R.I.P Secretariat, the greatest racehorse to ever set four hooves on a racetrack.
History of the Thoroughbred: Racing Before The Breed for Speed (Part 1) – Diary of an OTTB
History of the Thoroughbred: The Three Foundation Stallions (Part 2) – Diary of an OTTB
History of the Thoroughbred: American Triple Crowns & A Lasting Legacy (Part 3) – Diary of an OTTB
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