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Table 5 Y- chromosome short tandem repeat (Y-STR) combinations with minimum match probability (MP) for a specified number of Y-STR markers.1

From: Developing criteria and data to determine best options for expanding the core CODIS loci

Number

of loci

Y-STR combinations with minimum MP2

MP

KI = 1/MP3

1

15

0.1748

5.72

24

5, 15

0.0477

20.95

3

3, 5, 15

0.0178

56.25

4

1, 3, 5, 15

0.0083

121.1

5

1, 2, 3, 5, 15

0.0045

223.65

6

1, 2, 3, 5, 13, 15

0.0027

372.45

7

1, 2, 3, 5, 9, 13, 15

0.0020

501.29

8

1, 2, 3, 5, 9, 13, 14, 15

0.0016

620.91

9

1, 2, 3, 5, 9, 10, 13, 14, 15

0.0014

711.62

10

1, 2, 3, 5, 8, 9, 10, 13, 14, 15

0.0013

770.27

11

1, 2, 3, 4, 5, 8, 9, 10, 13, 14, 15

0.0012

819.92

12

0, 1, 2, 3, 4, 5, 8, 9, 10, 13, 14, 15

0.0012

847.22

13

1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 13, 14, 15

0.0012

866.46

14

0, 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 13, 14, 15

0.0011

876.41

15

0, 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15

0.0011

886.59

16

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15

0.0011

891.77

  1. 1This table was generated from the data of Budowle et al [9].
  2. 20 = DYS389I, 1 = DYS389II, 2 = DYS390, 3 = DYS456, 4 = DYS19, 5 = DYS458, 6 = DYS437, 7 = DYS438, 8 = DYS448, 9 = Y GATA H4, 10 = DYS391, 11 = DYS392, 12 = DYS393, 13 = DYS439, 14 = DYS635, and 15 = DYS385.
  3. 3Kinship index (KI) for true paternal lineage is the inverse of MP.
  4. 4For example, in all 2-loci Y-STR haplotype combinations (total 16 × 15 ÷ 2 = 120), the combination DYS458 and DYS385 ('5, 15' in the second row) had the lowest MP.
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Investigative Genetics

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