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Table 7 Impact of bias towards the reference allele due to alignment on concordance between low- and high-coverage sequence data by alignment with the original reference genome (REF), the tailored reference genome (ALT), or a combination of both (CIS and TRANS)

From: Impact of index hopping and bias towards the reference allele on accuracy of genotype calls from low-coverage sequencing

 

na

Genotype concordance (%)

Allele concordance (%)

Concordance by genotype (%)

True = 0

True = 1

True = 2

0|0

1|0

2|0

0|1

1|1

2|1

0|2

1|2

2|2

Best-guess

 REF

129,435

81.4

90.7

98.53

1.34

0.13

24.27

52.40

23.33

0.18

1.61

98.21

 ALT

129,327

81.4

90.7

98.36

1.49

0.14

23.66

52.42

23.92

0.17

1.47

98.36

 CIS

129,610

81.5

90.7

98.37

1.49

0.14

23.82

52.73

23.45

0.17

1.62

98.21

 TRANS

129,148

81.3

90.6

98.52

1.34

0.13

24.11

52.10

23.79

0.18

1.46

98.36

Probability ≥ 0.90

 REF

43,643

95.1

97.5

97.18

2.82

0.00

3.52

93.26

3.21

0.00

3.65

96.35

 ALT

43,489

95.0

97.5

96.75

3.25

0.00

3.35

93.30

3.36

0.00

3.22

96.78

 CIS

43,970

95.0

97.5

96.88

3.12

0.00

3.44

93.30

3.26

0.00

3.52

96.48

 TRANS

43,145

95.1

97.6

97.10

2.90

0.00

3.42

93.28

3.30

0.00

3.32

96.68

Probability ≥ 0.98

 REF

10,679

98.8

99.4

99.65

0.35

0.00

1.00

98.28

0.72

0.00

0.57

99.43

 ALT

10,638

98.8

99.4

99.64

0.36

0.00

0.92

98.26

0.81

0.00

0.41

99.59

 CIS

10,858

98.8

99.4

99.65

0.35

0.00

0.98

98.23

0.78

0.00

0.55

99.45

 TRANS

10,463

98.8

99.4

99.64

0.36

0.00

0.94

98.31

0.75

0.00

0.43

99.57

  1. aNumber of genotypes called for 5531 SNPs across 26 individuals