Symmetry of hip dysplasia traits in the German Shepherd Dog in Australia

Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie
B J WilsonPeter C Thomson

Abstract

Canine hip dysplasia (CHD) is a common and debilitating developmental condition of the canine coxofemoral (hip) joint, exhibiting a multifactorial pattern of inheritance. British Veterinary Association hip traits (BVAHTs) are nine radiographic features of hips used in several countries to ordinally score both the right and left hip of potential breeding candidates to assess their suitability for breeding. The objective of this study was to examine some aspects of the relationship between contralateral scores for each BVAHT in a cohort of 13 124 Australian-registered German Shepherd Dogs. Goodman and Kruskal gamma coefficients of 0.48-0.95 and correlation coefficients of 0.50-0.74 demonstrate that the association between right and left hip scores varies between moderate and strong for BVAHTs. Principal component analysis of scores detected a sizeable left-versus-right effect, a finding supported by symmetry and quasi-symmetry analyses which found that seven of the nine BVAHTs display significant marginal asymmetry. Dogs showing asymmetry for one BVAHT are significantly more likely to display asymmetry at other BVAHTs. When asymmetry is expressed as a binary trait (either symmetrical or asymmetrical), it displays low to moderate ...Continue Reading

References

May 1, 1992·The Veterinary Clinics of North America. Small Animal Practice·D C Richardson
Mar 1, 1989·Otolaryngology--head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery·R Willis
Jan 25, 2003·Behavioural Processes·Deborah L. Wells
Nov 4, 2005·The Journal of Heredity·V JanuttaO Distl
Aug 8, 2008·Laterality·Lara BattPaul McGreevy
Jan 1, 2010·The Veterinary Journal·Peter C ThomsonFrank W Nicholas

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Citations

Jun 15, 2013·The Veterinary Record·B FreemanN R McEwan
Jul 6, 2011·The Veterinary Journal·Bethany WilsonPeter C Thomson
Mar 31, 2015·The Veterinary Record·H S Humphreys, N R McEwan

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