Table 1 Grandparental birthplace cluster of examinees in seven groups with progressively reduced expected individual genome-wide homozygosity (after removal of 63 individuals due to missing genotypes of over 5%)

I

All four grandparents from Okljucna

II

All four grandparents from Komiza

III

All four grandparents from the central villages

IV

All four grandparents from Vis

V

Mixed origin (at least one grandparent from the island)

VI

All four grandparents from the rest of Croatia

VII

All four grandparents from the other countries

Total