Table 4.

Total number of LA dogs DNA tested for PRA4, showing genotypes and allele frequencies of the LINE-1 insertion

Genotypea Cohort	PRA4 −/−	PRA4 −/+	PRA4 +/+	Total	Allele frequency
Across 22 countries	6	170	735	911	0.1
UK only	4	107	457	568	0.1

^aThe wild type allele is represented by ‘+’ and the mutant allele by ‘-‘