The Bouvier des Flandres is a breed which exhibits a relatively high
level of homozygosity due to inbreeding and numerous inherited disorders are believed to have risen in prevalence as a result [25].
Absence or reduced heterozygosity means that a patient's genome contains long
stretches of homozygosity, which can be problematic if that region harbors a variant in an autosomal recessive disease gene.
The coefficient of inbreeding is an equation which expresses the expected
percentage of homozygosity arising from a given Sire and Dam, meaning, the probability of how genetically similar they are.
Moreover, there was a high level
of homozygosity among the dominant DLA class I (19 %) and II (42 %) haplotypes.
Ten English bulldogs and 10 Standard Poodles were randomly selected and their SNP arrays interrogated for
runs of homozygosity (ROH) using PLINK [30].
This study examines genetic diversity among 102 registered English Bulldogs used for breeding based on maternal and paternal haplotypes, allele frequencies in 33 highly polymorphic short tandem repeat (STR) loci on 25 chromosomes, STR - linked dog leukocyte antigen (DLA) class I and II haplotypes, and the number and size of genome - wide runs
of homozygosity (ROH) determined from high density SNP arrays.