Genebank details

Genetic Resources Unit, ICRAF

The ICRAF genebank in Nairobi, Kenya, conserves the diversity of a wide range of agroforestry tree species, most of which are a source of food or forage. Accessions are stored as seed and in field genebanks in the regions where ICRAF works.

The seed genebank currently holds over 6000 accessions of 190 species. Of these, information on 6456 is available through Genesys. Seed is maintained in an active collection at 5°C, and for long-term conservation ICRAF works with the Millennium Seed Bank in the United Kingdom and the Kunming Institute of Botany genebank in China.

Conservation of tree species poses special difficulties, including the large number of genera -- each with specific requirements -- long generation times and seeds that often cannot be dried for conventional storage. As a result, ICRAF has to maintain decentralised field genebanks. These field genebanks both conserve diversity and offer a source of sexual and clonal reproductive material. The field genebanks are also research sites for evaluation and characterisation. Overall, 12,000 accessions of 67 diverse tree and shrub species are maintained in field genebanks spread across 42 sites in 16 countries of which, 6769 Field Genebank accessions  are available through Genesys.

The seed and field genebanks supply germplasm for ICRAF's research to domesticate some species, and to others wanting access to agroforestry plant genetic resources.

About 19% of the seed accessions are safety duplicated at the Svalbard Global Seed Vault. About 8% of the accessions are maintained in long-term storage at Kunming Institute of Botany (KIB) in China.

A database -- the Agroforestry Species Switchboard -- gives access to "information sources to support tree research and development activities".

Institute code
KEN056
Type
CGIAR
Country
Accessions in Genesys
Location
Latitude
-1.2368
Longitude
36.81906
Most represented Crop names
Spiny monkey ball,Natal orange
1,625
Marula
1,382
Wild Loquat
1,253
African Mesquite
933
Apple-ring acacia
822
Other
6,542
Not specified
875
Most represented Genera
Strychnos
Sclerocarya
Uapaca
Acacia
Leucaena
Other
6,856
Most represented Species
Strychnos cocculoides
Sclerocarya birrea
Uapaca kirkiana
Prosopis africana
Faidherbia albida
Other
7,360
Last updates of passport data
20 May 2019
29 April 2019
29 January 2019
17 January 2019
29 June 2018
19 February 2018
Passport Data Completeness Index (PDCI)
Genesys uses the PDCI as an indicator of the completeness of published passport data. The PDCI uses the presence or absence of data points in the documentation of a genebank accession, taking into account the presence or value of other data points (van Hintum et al. 2011). For example, a wild accession should have a well-defined collection site but no variety name. The PDCI ranges from 0 to 10, where 0 is the minimum score assigned to rather incomplete passport records and 10 is the maximum score assigned to very complete passport records. Any type of accession, wild, landrace, breeding material or modern variety, can attain the PDCI’s maximal score.
Number of passport records
8000
6000
4000
2000
0 1 2 3 4 5 6 7 8 9 10
Passport Data Completeness Index (PDCI)
Average PDCI score for 13,225 accessions is 6.33, with minimum score of 3.10 and maximum score of 7.80.