Phenotypes

Fontanesi  et al. (2010): "[V]ariation in the white spotting in several cattle breeds is largely influenced by the multiple allelic series at the S locus, which includes at least four alleles (Olson 1999): SH (Hereford pattern), SP (Pinzgauer pattern or lineback), S+ (non-spotted) and s (spotting pattern). The SH allele gives white face, belly, feet and tail, often with a white stripe over the shoulder when homozygous. The SP allele gives pigm...

The double-muscle trait in cattle is characterised by an increase in muscle mass of approx 20%, resulting in substantially higher meat yield, a higher proportion of expensive cuts of meat, and lean and very tender meat, for which a substantial premium is paid. The trait is autosomal recessive, and the locus has been given the symbol mh. It occurs at such a high frequency in Piedmontese and Belgian Blue cattle that it is characteristic of these...

Michot et al. (2016): "a one base pair insertion (Chr14: g.23995411_23995412insA) that affects the retinitis pigmentosa-1 gene (RP1) . . . [and] is predicted to cause a frameshift at codon 791 and to terminate the protein 13 amino acids later (p. R791KfsX13)".