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Genetic improvement of hip-extended scores in dogs

E. A. Leighton, D. Holle, D. N. Biery and others

PLoS ONE (2019) 14

doi: 10.1371/journal.pone.0212544

• What did the research find?

Estimates of heritability for the hip-extended score were 0.76, 0.72 and 0.41 in German shepherd dogs (GSDs), labrador retrievers (LRs) and golden retrievers (GRs), respectively. Among first-generation puppies, 34 per cent of GSDs, 55 per cent of LRs and 43 per cent of GRs had an excellent hip-extended score. After eight generations of selection, this improved to 93 per cent of GSDs, 94 per cent of LRs and 87 per cent of GRs. However, at least half of the dogs with an excellent hip-extended score remained susceptible to developing osteoarthritis.

Genetic selection for hip-extended score improves hip quality but does not eliminate the risk of dogs developing osteoarthritis

• How was it conducted?

Records for purebred GSDs (n=5201), LRs (n=4987) and GRs (n=2308) born at The Seeing Eye, New Jersey, USA, from 1976 to 2013 were included in the study if the dogs had been evaluated for hip quality. Hip-extended …

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