Abstract
An investigation concerning the occurrence of osteochondrosis and arthrosis in 2 materials totalling 63 pigs of the Landrace breed and 63 of the Yorkshire breed is described. The animals were bred under the same conditions of feeding and housing. The differences should therefore mainly be of genetic origin. Both breeds were highly improved, Landrace the most. In general, Yorkshire pigs showed a lower incidence and a less marked degree of osteochondrosis and arthrosis than Landrace pigs. Statistically significant differences (P < 0.01) were demonstrated in the distal epiphyseal plate of the ulna, in the intervertebral joints of the lumbar region and in the medial condyle of the femur in 1 of the materials. The Landrace pigs had longer bodies, broader hindquarters, shorter femurs, and the stifle had a different shape as compared with Yorkshire pigs. There thus seemed to be a connection between exterior features, joint and bone shape and the occurrence of joint lesions. Differences among litters within breed were also demonstrated.
Keywords: osteochondrosis, arthrosis, breed differences, pig
Sammendrag
Forekomst av Osteochondrose og arthrose er heskrevet etter undersøkelse av 63 landsvin og 63 yorkshire. Dyra ble oppdrettet i samme miljø. Forskjellene skulle derfor hovedsakelig være av genetisk natur. Begge rasene var sterkt foredlet, landsvin mest. Generelt hadde yorkshire lavere frekvens og mildere grad av Osteochondrose og arthrose enn landsvin. I distale epifyseplate av ulna, i intervertebralledda i lumbalregionen og i mediale condyl av femur var forskj ellen statistisk sikker (P < 0.01) i ett av materialene. Landsvin hadde lengre kropp, bredere bakpart, kortere femur og en annen utforming av kneleddet enn yorkshire. Det var derfor tilsynelatende en sammenheng mellom eksteriøre bygningstrekk, utforming av ledd og knokler og leddlesjoner. Det ble også påvist forskj eller mellom kull innen rase.
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