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The summer of 2017 saw the publication of a scientific paper titled "Y Chromosome Uncovers the Recent Oriental Origin of Modern Stallions" with the outcomes found in this paper covered by Eric Mitchell in the Blood Horse that year. The paper at the time, while generally a broad discussion about the origins of the equine breed, did raise some questions about our...
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This morning you may see that we have extended the computations of the Coefficient of Inbreeding and Coefficient of Relatedness to 10 generations. These coefficients were previously calculated over 8 and 6 generations respectively and were done to that generation previously due to computational restrictions, i.e, the speed of the computers and the frequency of...
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A couple of weeks ago the manager of a TrueNicks enrolled stallion called to tell us that a hypothetical mating had generated Dosage Figures that were all zeroes – zeroes for each category in the Dosage Profile; a Dosage Index of zero; and a Center of Distribution of zero. A check confirmed that this was not an error, and nor was it the result of an obscure pedigree...
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A year or so ago another company that I am associated with, Performance Genetics, did a private study on mitochondrial DNA, the strand of DNA that is maternally inherited in all species and can be used to classify female lineages. We were specifically looking into the #1 family of Tregonwell's Natural Barb which is now that of the likes of Black Caviar, Super...
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Quite often in catalog pages you will see a nick where a full brother has been used in preference to another. We decided to take a look at the raw data and see what it says in practice. Is it in fact just a matter of names on the page, or is class really that important? There are a lot of circumstances where replacing full brothers in various positions is almost...
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