Canine hip and elbow dysplasia have been reported as quantitative traits (e.g. Leighton et al., 1977 ; Swenson et al., 1997). In addition to the quantitative inheritance, a possibility of a major gene or mitochondrial inheritance has been suggested (e.g. Janss and Brascamp, 1998 ; Todhunter et al., 1999). Mäki et al. (2002) studied the mode of inheritance in four Finnish dog populations. Existence of segregating major genes was preliminarily assessed based on frequency distributions of hip and elbow dysplasia of the offspring of individual sires. These family specific distributions did not show any sign of major genes, for example multimodality. This does not, however, rule out the possibility of a major gene in either of the traits, as the effect of a major gene would have to be very large to affect the distributions of the traits. In this study a segregation analysis was applied in order to assess the possible existence of major genes affecting hip and/or elbow dysplasia in the Finnish Rottweiler population.

K. Maki, A. F Groen, L. LG Janss, A. E Liinamo, M. Ojala

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 2002. Session 13, , 13.14, 2002
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