Table 1.

Sample size (n) and frequency of the Thr-175 allele in different cattle populations

Sample	n	Frequency, %
Affected animals	122	97.95*
Declared carriers	95	50.00
German Braunvieh born 1985–1990	217	1.84
German Braunvieh born 2000–2006	486	4.42
Original Braunvieh	123	0.41†
Tyrolian Gray	48	0.00
Murnau-Werdenfelser	53	0.00
Murbodner	48	0.00

*Only three animals considered as phenocopies are not homozygous for the Thr-175 variant.

^†One Original Braunvieh animal shows the genotype and haplotype of typical SMA carriers.