Ancient Migration Linked to Genetic Health Risks for Native Hawaiians
Summary
A genome study found that repeated migrations by small groups across Polynesia created strong founder effects, which can make rare inherited disease variants more common. The researchers said some variants may matter for Native Hawaiian and other Eastern Polynesian health, while warning that these populations are underrepresented in major genetic databases.Key Facts
- Researchers analyzed whole-genome data from 1,050 people across French Polynesia and used additional data from Rapa Nui, Native Hawaiians, Samoans and Tongans.
- The study found founder effects in Polynesian populations at least 10 times stronger than those documented among Finns.
- The findings suggest Hawaiʻi and Rapa Nui were settled by the same long-distance voyaging population, with earlier ancestral roots in Mangareva.
- Small founding populations carried only part of the genetic diversity of their source populations, allowing some rare variants to become more common over generations.
- The researchers examined variants linked to ADAMTSL4-related lens displacement, PDE6B-related retinal disease and FAN1-related kidney disease.
- The three variants were found in about 2 to 3 percent of the Eastern Polynesians studied; all three conditions are recessive.
- The article says the study highlights a gap in genomic medicine because variants relevant to Native Hawaiian health may be missing from major genetic databases.
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