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Chapter 5 Experiments and Results
Probability of Identity
Table 12 shows the Probability of Identity (PI) values of the AmpFlSTR® Identifiler®
Plus Kit loci individually and combined.
Table 12 Probability of Identity values for the AmpFlSTR Identifiler Plus Kit
STR loci
AfricanAmerican
U.S.
Caucasian
U.S. Hispanic
Native
American
CSF1PO
0.079
0.132
0.141
0.123
D2S1338
0.023
0.027
0.038
0.043
D3S1358
0.097
0.076
0.112
0.158
D5S818
0.104
0.147
0.115
0.110
D7S820
0.085
0.063
0.083
0.081
D8S1179
0.074
0.064
0.089
0.104
D13S317
0.132
0.079
0.056
0.056
D16S539
0.077
0.097
0.090
0.082
D18S51
0.033
0.031
0.031
0.046
D19S433
0.042
0.087
0.049
0.044
D21S11
0.037
0.044
0.047
0.074
FGA
0.034
0.035
0.032
0.031
TH01
0.109
0.079
0.097
0.134
TPOX
0.089
0.188
0.168
0.159
vWA
0.066
Locus
Combined
1.31 ✕ 10
0.066
−18
5.01 ✕ 10
0.080
−18
7.65 ✕ 10
0.103
−18
3.62 ✕ 10−17
The PI value is the probability that two individuals selected at random will have an
identical AmpFlSTR Identifiler Plus Kit genotype (Sensabaugh, 1982). The PI values
for the populations described in this section are then approximately 1/7.64 ✕ 1017
(African-American), 1/2.00 ✕ 1017 (U.S. Caucasian), 1/1.31 ✕ 1017 (U.S. Hispanic),
and 1/2.76 ✕ 1016 (Native American).
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AmpFlSTR® Identifiler® Plus User Guide