ALFRED: allele frequency database
      The ALlele FREquency Database   
ALFRED is a resource of gene frequency data on human populations
supported by the Yale Center for Medical Informatics.

Sample Information:

Population NameSample NameALFRED UIDNumber of Chromosomes

Relation to Other Samples: 
Estimated heterozygosities for various sites: 
Sample Description: 

This sample consists of individuals belonging to Pilões, an African-derived community located in the Ribeira River Valley in the southern part of São Paulo State, Brazil. This community has a total of 128 inhabitants. Informed consent was obtained from all participants.

Before the abolition of slavery in Brazil (1888), many communities (quilombos) were founded by fled or abandoned African slaves. It is estimated that there are at least 700 such communities within Brazilian territory. These communities can be regarded as relics of the original African contribution to the Brazilian population.

- Cotrim NH, Auricchio MT, Vicente JP, Otto PA, Mingroni-Netto RC. "Polymorphic Alu insertions in six Brazilian African-derived populations". Am J Hum Biol. 16:264-277. (2004) Online citation.

© 2019 Kenneth K Kidd, Yale University. All rights reserved. The full Copyright Notification is also available.
Originally prototyped by Michael Osier with the aid of Kei Cheung
Upgrades and maintenance since 2002 by Haseena Rajeevan