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ICAR > Homepage > Certifications > DNA Certifications > Certification and accreditation of organisations offering DNA-based services > Two DNA-based services > Parentage Analysis SNP Exchange (GenoEx-PSE)

Parentage Analysis SNP Exchange (GenoEx-PSE)

About the Service

The main purpose of Genotype Exchange for Parentage Analysis (GenoEx-PSE) database is to provide a service for exchanging standardized sets of SNP for genotyped animals to facilitate parentage analysis activities carried out by authorized service users of the GenoEx-PSE service that are responsible and/or active in parentage integrity. 

Three sets of SNP were envisioned for this exchange service, among which only the first two (Groups A and B) are currently available. The groups are as follows:

  • Group A:  200 SNP recommended by ISAG for parentage verification
  • Group B:  354 SNP in addition to Group A to be used for parentage discovery
  • Group C:  980 SNP, different from those in Groups A or B, to be used for the imputation of microsatellite SNP profiles for parentage verification

Each authorized service user for GenoEx-PSE requires first completing the ICAR Certification for DNA Data Interpretation Centres for the appropriate level of parentage analysis service  which may be for parentage verification alone or for both parentage verification and discovery. Depending on the level of ICAR certification obtained, the GenoEx-PSE service user would be able to upload and download the group of SNP, as outlined above.

The following table provides the number of SNP within each group by chromosome. The complete list of SNP include in each group is available on GenoEx.org

Chromosome Group A Verification Group B Discovery Group C
MS Imputation		 Total
1 11 40 70 121
2 9 42 80 131
3 8 32 110 150
4 9 4   13
5 9 33 90 132
6 8 2   10
7 11 26   37
8 6 31   37
9 6 3 110 119
10 9 2   11
11 10 27   37
12 5 3   8
13 6 30   36
14 5 1   6
15 7 3 40 50
16 5 1 80 86
17 9 2   11
18 7 2 40 49
19 8 27 80 115
20 5 5 120 130
21 8 25 80 113
22 7 1   8
23 4 2 80 86
24 4 2   6
25 4 2   6
26 4 2   6
27 6 1   7
28 6 1   7
29 4 2   6
Total 200 354 980 1,534

The list of SNP included in Groups A, B and C have been discussed and recommended by the GenoEx-PSE Expert Group, reporting to the ICAR DNA Working Group. In addition to defining the list of SNPs to be initially included in the GenoEx-PSE service, the Expert Group also recommended file formats for the uploading and downloading of data into the GenoEx-PSE database.

Service users

Organisations wishing to join GenoEx-PSE services shall:

  1. Be member of ICAR or be nominated by an ICAR member;
  2. Have a valid “ICAR Certification for DNA Data Interpretation Centres”;
  3. Sign a Service User Agreement with the Interbull Centre.

All the information and administrative details related to the GenoEx PSE Exchange can be found on the Interbull Centre web site available here

According to the Service Agreement (SA) between Interbull and GenoEx-PSE users, all users are obliged to provide certain information, which is later to be stored and maintained by ICAR.

This information is:

  1. The area of responsibility (breed, region, herdbook status) for each of the authorized organization(s) within each country –
    SA Clause 3.5 and reported in the bottom of the page
  2. The eligibility for participating in the service – SA Clause 4 and reported in the bottom of the page
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