Yoruba in Ibadan, Nigeria [YRI]

Available Samples Family Relationships
Cell Cultures: 120
DNA: 120
DNA Sample Panel: MGP00013
 Trios:  60
 Parent-Child Duos:  9
 Unrelated Individuals:  31

Shared Samples

The 1000 Genomes Project shares some samples with the International HapMap Collection. The Family Relationships listed above includes those samples that were also part of the HapMap Project which can be found here.

Population Description

These cell lines and DNA samples were prepared from blood samples collected in a particular community in Ibadan, Nigeria. Samples are from 60 parent-child trios, 9 parent-child duos, and 31 unrelated individuals. All parents in the trios identified themselves as having four Yoruba grandparents.

Referring to Populations

It is important to include a reference to "Ibadan, Nigeria" when describing the source of these samples. Including the name of the city and the country where these samples were collected reinforces the point that the sample set, while not genetically atypical, does not necessarily represent all Yoruba people, whose population history is complex. The population should not be described merely as "African", "Sub-Saharan African", "West African", or "Nigerian", since each of those designators encompasses many populations with different geographic ancestries.

Note that the adjective form is "Yoruba", as in "the Yoruba samples", not "Yoruban". The accent is on the first syllable (YOR-u-ba).

The full population descriptor is Yoruba in Ibadan, Nigeria.” The shorthand label is Yoruba and the abbreviation is YRI.

It may be scientifically appropriate to pool data from these samples with data from other ancestrally related groups, when the data show that the groups have similar allele frequencies. If the groups all have African ancestry, the designation "African ancestry" (abbreviation: AFA) to describe the combined analysis panel is recommended. If only groups very closely related to the Yoruba have similar allele frequencies, then another abbreviation may need to be used.

Additional guidance about how to refer to the populations can be found at Guidelines for Referring to the Populations in Publications and Presentations. 

Principal Investigators 

  • Charles Rotimi -Howard University, Washington, DC 
  • Clement Adebamowo -University of Ibadan, Ibadan, Nigeria