Table 1 Correction of kinship coefficient for different genome coverage of ancient samples with known first-degree relation. High, medium, and low refer to coverage levels

Sample 1

Sample 2

Marker overlap fraction

Relation

Expected kinship coeff

Uncorrected kinship coeff

Corrected kinship coeff

Father high

Child high

0.933894

First degree

0.25

0.22883

0.24502

Father high

Child low

0.377769

First degree

0.25

0.09179

0.24297

Father medium

Child high

0.730011

First degree

0.25

0.17604

0.24114

Father medium

Child low

0.296127

First degree

0.25

0.07150

0.24144

Father low

Child high

0.511753

First degree

0.25

0.12239

0.23915

Father low

Child low

0.207545

First degree

0.25

0.05014

0.24160

Father high

Father medium

0.778247

Sample matching

0.5

0.38284

0.49193

Father high

Father low

0.545866

Sample matching

0.5

0.27020

0.49499

Father medium

Father low

0.427389

Sample matching

0.5

0.20863

0.48814

Child high

Child low

0.354511

Sample matching

0.5

0.17286

0.48761

Sample

Sample type

Coverage

Typed marker count (1240k)

Father high

Teeth

11.997

1,148,973

Father mid

Petrosa

3.057

896,623

Father low

Petrosa

1.546

630,405

Child high

Petrosa

5.510

1,075,845

Child low

Petrosa

0.879

435,005