Byron Rogers

Changing Pedigrees to reflect new data

9 posts in this topic

Genomics have changed a lot of industries and the Thoroughbred industry is one also with both mitochondrial DNA and Y-Chromosome DNA changing our historical record of ancestry. Changing the data for what we now know to be true and making the pedigree of Bend Or being out of Clemence (not Rouge Rose) and Galopin being by Delight and the pedigree of the leading racehorse and champion sire Teddy looks a lot different (and more interesting)

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As does the pedigree of the leading sire Tracery.

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thanks Byron.

Have always enjoyed reading your blogs.

While I really enjoyed your blog on mega nicks, could I ask you to do one that is from recent times.( Say last 10 years)

This will mean a smaller data set. Could you go down to a data set of 10 foals of racing age.

 

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The interesting aspect of the Bend Or finding is that the likely effective line breeding in the very successful and prolific blend with Macaroni mares remains the same with either Rouge Rose or Clemence. Whilst Clemence introduces line breeding to Banter, the line breeding to Derby winner Election and his full sister in blood the unnamed dam of Derby winner Moses (Sister to Castanea) remains intact. 

  

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HH88. 

Yes. A lot of the BendOr/Tadcaster - Macaroni cross remains the same. It does make the relationships to other stallions like Hampton (in Teddys pedigree as example) significantly different.

May I politely suggest that instead of using Lowe numbers you look at the actual mtDNA haplotypes. I think that you will find this more illuminating as relationships between horses become far more impactful when they share the same mtDNA haplotype.

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HH88 

As an example of the above.

Bend Or, with the pedigree of Tadcaster - With Doncaster (carrying Pocahontas + Banter) and Newminster (Banter) and Martha Lynn and hailing from the 2-H family, becomes a lot more interesting for Teddy's granddam Doremi who has Macaroni (Banter) but is out of a mare that has 2 strains of Touchstone (Banter) and Voltigeur (Martha Lynn) and is from the 2-N family.

An easy reading of the new Bend Or pedigree is that because he is from the 2-H family and Doremi is from the 2-N family they are distantly related. However, when you actually look at the mitochondrial DNA, which is inherited tail female, Teddy's pedigree becomes a little more interesting.

Bend Or/Tadcaster - L4 mtDNA haplotype

Doremi - L4 mtDNA haplotype

Ormonde - L3 mtDNA haplotype

Hampton - L2 haplotype

Lord Clifden - L4 Haplotype.

Lord Clifden, who is the same Newminster/Martha Lynn combination as the dam of Bend Or/Tadcaster is actually from the same mtDNA haplotype as Bend Or/Tadcaster and Doremi (who is also bred on the same name combinations). They are all - Ormonde and Hapton included - more distantly from the same "L" mtDNA haplogroup (the L Haplotype being the largest in the Thoroughbred breed). 

 

 

 

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Will all the by 'AAAA or BBBB' sires in pedigrees be eliminated now? Hope that the traditionalists don't retain their bewilderment, because it's traditional'.

Can the 'mystery' of Northern Dancer, as proposed by Harold Hampton, be solved now?

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