1/6/2023 0 Comments Collie eye anomalyJournal of Small Animal Practice 41(2): 56-59, 2000Ĭollie eye anomaly in blind Collie pups. Influence of selective breeding on the prevalence of chorioretinal dysplasia and coloboma in the rough collie in Sweden. Journal of Small Animal Practice 42(4): 204, 2001 Journal of Small Animal Practice 32(2): 89-92, 1991Ĭollie eye anomaly in the rough collie. These results have important implications for breeding programmes and the genetic control of CEA.Ĭollie eye anomaly in the rough collie in norway. CRD prevalence in offspring of CRD X coloboma matings was significantly lower than in pups of CRD X CRD matings, reflecting effects of the coloboma genotype on vitality. The results are compatible with polygenic inheritance but not with simple autosomal recessive inheritance. The prevalence of CRD in pups from normal X normal matings and CRD X CRD matings was significantly different from that expected under simple autosomal recessive inheritance (43 per cent versus 25 per cent and 85 per cent versus 100 per cent). A significant decrease in litter size occurred if one of two affected parents had coloboma (3.8 pups) compared with litters from two chorioretinal dysplasia- (CRD-) affected collies (5.2 pups) or litters by two normal collies (5.0 pups), indicating an influence of the coloboma genotype on offspring vitality. All dogs were positively identified and the results were registered under the Swedish Kennel Club genetic health programme. Journal of Small Animal Practice 41(6): 254-258īetwrough collies were examined for collie eye anomaly (CEA) at up to 10 weeks of age. Collie eye anomaly in the rough collie in Sweden: genetic transmission and influence on offspring vitality
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