Oculoskeletal Dysplasia 1 (OSD1) / Retinal Dysplasia (RD) – Labrador Retriever
Oculoskeletal Dysplasia 1 (OSD1) is a genetic disorder characterized by dwarfism and retinal dysplasia (RD), potentially leading to joint deformities and vision loss. It can be caused by a recessive mutation in the collagen, type IX, alpha 3 (COL9A3) gene and has been identified specifically in the Labrador Retriever. COL9A3 plays an essential role in healthy cartilage and eye development. Therefore, a mutation in this gene can lead to skeletal and ocular abnormalities. A related variant also occurs in the Northern Inuit Dog, Tamaskan and British Timber Dog breeds.