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Haplotype L4 classifies the numerous australian colonial family and with distaff family @ f.f. C6, this G3 winning filly Bridal Waltz belongs to these.

Female Family C6 @Haplotype L4 bases influences collectively @ 2 family, goes mentioned as Burton Barb mare, however by established ancestral, the Chestnut Thornton remains to this day enigmatic.

The home-bred filly by Snitzel out of an Lonhro unraced mare clearly expresses the true Australian blue-blood type. However never to be forgotten has 3x Star Kingdom son > 6×7 Todman 6th dam sire and again…additionally 2nd dam sire, seen to Rubiton. The other Star Kingdom male line is thru Redoute’s Choice, sire of Snitzel.

Todman’s distaff is f.f. 1-u Haplotype L3a1b, equivalent to f.f. 6-e that rings to Selene, thence profile encompasses 18x Hyperion. There the Todman incline to Northern Dancer >Nearctic b/m sire Hyperion. Recognizing f.f.6-e factors to Sir Tristram, male line to Lonhro. L3a1b also akin to family 8 & family 20 – Lonhro & Century.

Northern Dancer’s son Voodoo Rhythm may alight more so memories 25x G1 wins @Winx (Street Cry) her 2nd dam sire. Interestingly, the Winx 5-b distaff haplotype suggests @L3a1 screened to the dam The Giggler.

Voodoo Rhythm – 1 race as a two year old, defeating Key to Content over six furlongs. At three he won over a mile at Aqueduct (subsequently disqualified) and proceeded to two more wins at Belmonst over six furlongs. As a four year old he won over 1 1/8 miles at Belmont and was placed third to Engine one & MISWAKI over 6 furlongs.

It is with working pedigrees – profiling an integration @Byerley Turk bloodlines (or Godolphin Arabian/Barb male line for that fact) summons necessary integrity. Whilst narratives to these 2 formative TB sires falls to collapsed/extinct history ‘stayer’ T type, it appears science now engages a much finer determination why these gene carriers are so very important.

These bloodlines upgrade what modern breeding critique has likely overlooked heavily – placing dynamic sprinter speed ahead. (Selective breeding for speed in the racehorse has resulted in an unusually high frequency of the C-variant (g.66493737C/T) at the myostatin gene (MSTN) ref. 2012 https://www.nature.com/articles/ncomms1644

 Horses of the CC genotype are most suited to fast, short distance racing, those with the CT genotype are most suited to middle-distance races and those with the TT genotype are more suited to longer races which require stamina. In far simple terms anaerobic versus aerobic.

In Thoroughbreds, the T allele at g.65809482T>C is associated with increased vasodilation, meaning the blood vessels widen more effectively. To the Thoroughbred the T-allele is the ancestral ‘wild-type’ variant.

Implications for Breeding & Testing

The SINE insertion likely underpins historical selection toward sprinting traits in modern Thoroughbreds, particularly post-20th century.

Commercial genetic tests using the MSTN SNP may miss the mechanistic basis of performance.✅✅✅Hello?

Commercial speed is excessive, and racing programs may very will contribute to regression.

This diverse T Type – still critical to the racing thoroughbred – a genetic diversity essential for the continuing adaptability and resilience in the face of global contraction. Though intangible, breeding the asset is development and where pedigree interfaces with racehorse science.

From human athletic function: The Hercules Gene is labelled the MTSN (myostatin) gene and it controls how much Myostatin your body produces. One of the reasons you may not have seen it take over is because as with most mutations when you get an advantage you also accept some negatives. The Hercules gene allows you to exceed normal muscle growth but at a cost of excess stress to your bone structure, reduced speed and stamina.

The Equine Myostatin

  • Myostatin and Vasodilation:The myostatin gene (MSTN) plays a role in muscle growth and development, but it also influences blood vessel function. In Thoroughbreds, the T allele at g.65809482T>C is associated with increased vasodilation, meaning the blood vessels widen more effectively. 
  • Performance Implications:This vasodilation is beneficial for racing performance because it allows for better oxygen and nutrient delivery to muscles during exercise, particularly at shorter distances where bursts of speed are crucial. 
  • SNP Associations:The T allele at g.65809482T>C is not isolated. It’s associated with other SNPs within the MSTN gene, and these combinations can be used as genetic markers to predict a horse’s optimal racing distance. 
  • Speed Gene: the MSTN gene, is often referred to as the “speed gene” and is used to predict a horse’s optimal race distance.
  • Genetic Diversity:While the T allele is linked to speed, it’s important to note that other genetic factors also contribute to overall racing performance.✅✅ The C allele, has only become more common due to selective breeding for speed in Thoroughbreds. 

@ Bridal Waltz T allele’s are likely upon contribution @Rubiton male line https://www.ttrausnz.com.au/edition/2023-02-10/who-was-i & Lonhro https://www.ttrausnz.com.au/edition/2023-08-15/analyse-this-august-sire-focus-on-lonhro.

The tools (selection) are as always, in the hands of breeders. A special home-bred filly Bridal Waltz is deserving. https://www.ttrausnz.com.au/edition/2025-07-27/saturday-summary-3-year-olds-shine-across-australasia-as-spring-looms