International genomic research has identified a combination of genomic markers (haplotype) which is strongly associated with reduced vitality in Brown calves when this combination is inherited from both parents.
The transmission of a recessive haplotype occurs according to the same process followed by other recessive genes (such as Weaver or SMA). Avoiding the mating of carriers of this haplotype is highly recommended.
Every genotyped animal with a 54k chip can be tested reliably for this haplotype.
An international list of the male carriers of haplotype BH2 is available: List of the male carriers of haplotype BH2
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