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Leg Weakness in Pigs
„Leg weakness“ hos gris. II. Kullforskjeller i „leg weakness“, skjelettlesjoner, leddutforming og eksteriør
II. Litter Differences in Leg Weakness, Skeletal Lesions, Joint Shape and Exterior Conformation
Acta Veterinaria Scandinavica volume 15, pages 574–586 (1974)
Abstract
Investigations were carried out concerning possible litter differences in locomotory ability and exterior conformation, and possible litter and sire group differences in the occurrence of skeletal lesions and in joint shape. The animals were from a breed experiment involving 6 litters, 8 feeding experiments involving 64 litters, and a selection experiment totalling 70 litters and 25 sire groups distributed in 3 lines. One hundred and twenty-one out of 285 P values for litter or sire group differences were statistically significant (P < 0.05). This shows, with reservations concerning the possibility that different environmental conditions up to 20 kg live weight may have produced a litter effect on pigs from the breed and feeding experiments, that heredity plays a significant part in the leg weakness complex. It seems justified to conclude that it partly is the inheritance of certain joint shapes and exterior conformational features, which influence the degree of joint lesions and locomotory ability and give rise to litter differences. This gives the theoretical possibility of selecting for more lasting joints and better locomotory ability using criteria based on joint shape and exterior conformation.
Sammendrag
Det er undersøkt for kullforskjeller i bevegelsesevne og eksteriør og kull- og fedregruppeforskjeller i leddlesjoner og leddutforming. Grisene var fra et raseforsøk med 6 kull, 8 foringsforsøk med tilsammen 64 kull og et seleksjonsforsøk med tilsammen 70 kull og 25 fedregrupper fordelt på 3 linjer. Etthundreogtjueen av de 285 P-verdiene for kull- eller fedregruppeforskjeller en har omtalt i denne artikkelen, var statistisk sikre (P < 0,05). Dette viser, med forbehold for muligheter for kulleffekt av forskjellig miljø fram til 20 kg levende vekt for dyr fra rase- og foringsforsøkene, at arv spiller en vesentlig rolle i „leg weakness“-komplekset. En mener å ha vist at det delvis er nedarving av spesiell leddutforming og eksteriør som påvirker grad av leddlesjoner og bevegelsesevne og fører til kullforskjeller. Dette gir teoretisk en mulighet for seleksjon for mer holdbare ledd og bedre bevegelsesevne ved hjelp av kriterier som angår leddutforming og eksteriør.
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Grøndalen, T. Leg Weakness in Pigs. Acta Vet Scand 15, 574–586 (1974). https://doi.org/10.1186/BF03547227
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DOI: https://doi.org/10.1186/BF03547227