The heritability of degenerative joint disease in the distal tarsal joints in Icelandic horses
| Autor: | J. Carlsten, Thorvaldur Árnason, Mats Axelsson, Sigrı́∂ur Björnsdóttir, Helgi Sigur∂sson, P. Eksell |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
education.field_of_study
General Veterinary biology business.industry Population biology.animal_breed Flexion Test Bone spavin Tarsal Joint Anatomy Genetic correlation body regions medicine.anatomical_structure Lameness Tarsus (skeleton) Icelandic horse Medicine Animal Science and Zoology business education |
| Zdroj: | Livestock Production Science. 63:77-83 |
| ISSN: | 0301-6226 |
| DOI: | 10.1016/s0301-6226(99)00112-8 |
| Popis: | The heritability of radiographic signs of degenerative joint disease (DJD) in the distal tarsal joints and hind limb lameness after flexion test of the tarsus was estimated in a population of Icelandic horses being used for riding. Furthermore, the genetic and phenotypic correlation between the radiographic signs and lameness was estimated. Of the 614 examined horses, aged 6–12 years, 420 belonged to progeny groups from 17 selected stallions and 194 were sired by unselected stallions. The heritability was analyzed by two statistical models based on the threshold liability concept, a non-linear sire model and a linear animal model. The heritability of radiographic signs of DJD in the distal tarsal joints was not found to be significantly different from zero. The h2 estimate for lameness was higher and in the order of 0.4. A positive genetic and phenotypic correlation was identified between radiographic signs of DJD in the distal tarsal joints and lameness. The results indicate that the prevalence of DJD in the distal tarsal joints could be reduced in Icelandic riding horses by breeding selection based on flexion test of the tarsus followed by radiographic examination. |
| Databáze: | OpenAIRE |
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