Table 1.

Variation in the frequency of inbreeding events depending on the depth of the pedigree.

Inbreeding group	N (both parents and at least one grandparent known)	% of inbred	N (all 4 grandparents known)	% of inbred
>0.25	0	0.0	0	0.0
0.25	9	2.2	2	0.6
<0.25>0.125	3	0.7	3	0.9
0.125	24	5.9	23	6.6
<0.125>0.0625	9	2.2	8	2.3
0.0625	34	8.4	28	8.1
<0.0625>0.03125	31	7.7	27	7.8
0.03125	46	11.4	40	11.6
<0.03125>0.015625	23	5.7	21	6.1
0.015625	56	13.8	45	13.0
<0.015625<0.0078125	28	6.9	26	7.5
0.0078125	47	11.6	43	12.4
<0.0078125>0	95	23.5	80	23.1
Total with F>0	405	100	346	100
Total with F = 0	1443		475

Inbreeding events are split into well known groups (e.g. 0.25 - parent-offspring, full-siblings etc; 0.125 - half-siblings, uncle-niece etc; 0.0625 - first cousin, half-uncle-niece etc; 0.03125 - first cousins once removed, half-first cousins etc; 0.015625 - second cousins, first cousins twice removed etc; 0.0078125 - second cousins once removed, half-second cousins etc.) and those that require more complex relationships. The relative frequency of types of inbreeding event is similar when considering datasets of individuals with both parents and at least one grandparent known or with all four grandparents known.