PMCCPMCCPMCC

Search tips
Search criteria 

Advanced

 
Logo of actavetsBioMed CentralBiomed Central Web Sitesearchsubmit a manuscriptregisterthis articleActa Veterinaria Scandinavica
 
Acta Vet Scand. 2012; 54(1): 22.
Published online Apr 2, 2012. doi:  10.1186/1751-0147-54-22
PMCID: PMC3384465
Pedigree analysis of Czech Holstein calves with schistosoma reflexum
Jindrich Citekcorresponding author1
1Department of Genetics and Animal Breeding, Faculty of Agriculture, South Bohemia University, Studentska 13, Ceske Budejovice CZ37005, Czech Republic
corresponding authorCorresponding author.
Jindrich Citek: citek/at/zf.jcu.cz
Received October 6, 2011; Accepted April 2, 2012.
Abstract
Background
Schistosoma reflexum (SR) is congenital syndrome briefly characterized by visceral eventration, severe dorsoflexion and ankylosis of the spine and arthrogryposis. A genetic etiology has been proposed, but conclusive evidence has not yet been provided.
Methods
Pedigree analysis was carried out in 29 cases of SR in Czech Holsteins and Holstein crosses. Genetic relationship was evaluated and inbreeding coefficients calculated. Pedigrees of 15 Czech Holsteins fathering non-SR affected calves were used for comparison.
Results
Twenty-one cases occurred in one pedigree founded by three sires while three SR calves occurred in another pedigree with a common grandfather. The sex ratio between affected males and females was 11:6. Affected calves shared common ancestors different from those shared by the unaffected calves. The inbreeding coefficient in the SR affected calves was not increased compared to unaffected calves.
Conclusions
The findings are consistent with SR being inherited autosomal recessively. Further studies are however needed to confirm this and therefore a breeding trial is recommended where a suspected heterozygous sire is mated to closely related females.
Keywords: Cattle, Schistosoma reflexum, Inheritance, Congenital, Malformation
Articles from Acta Veterinaria Scandinavica are provided here courtesy of
BioMed Central