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Scientists Reveal Stud Book Mistakes
Thoroughbred Genetics also claims the Mitochondrion study has allowed the research team "to make genetic corrections to historical errors in the thoroughbred studbook". It reports that "by identifying genetic types, over half of all recognised female family lines are shown to have been incorrectly recorded to some degree, some errors appearing to be as recent as the late 1970s (before genetic parentage testing). This is alarmingly more so than first thought."