Genetic study traces Native Hawaiian origins to Mangareva, reveals health risks from founder effect

Stanford-led research finds closest ties between Hawaii and Rapa Nui, identifies mutations linked to rare diseases

By LineZotpaper AI staff

Published27 October 2026

Updated27 October 2026

Read Time2 min

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Illustration: Genetic study traces Native Hawaiian origins to Mangareva, reveals health risks from founder effect

A new genetic study has traced the origins of Native Hawaiians to the island of Mangareva, revealing that the closest genetic ties exist between the two most isolated islands in Polynesia: Hawaii and Rapa Nui. The research, published in Science, also identified three harmful mutations that arose from repeated population bottlenecks experienced by small groups voyaging across the Pacific.

The study, co-senior authored by Alexander Ioannidis, a genetics and biomedical data science researcher at Stanford University, analyzed whole-genome sequencing data from 1,050 individuals across French Polynesia, 12 unpublished genomes from Rapa Nui, and genomic data from Native Hawaiians, Samoans, and Tongans from the NIH's All of Us Biobank. Using a machine learning tool called Gnomix, the team isolated genetic segments of Polynesian ancestry and applied an identity-by-descent method to link living descendants to common ancestors.

"What we uncover in this paper is where the native people of Hawaii had come from," Ioannidis said. "Hawaii is the only Polynesian island in the Northern Hemisphere, so it's a long way from everything." The researchers found the closest genetic ties between Hawaii and Rapa Nui, with Mangareva Island suggested as the ancestral launching point for both populations.

The study highlights the founder effect: as small groups sailed between islands on double-hulled catamarans carrying only dozens of people, successive bottlenecks reduced genomic diversity and increased the odds of harmful mutations. Three mutations were associated with autosomal recessive conditions: a variant of ADAMTSL4 linked to detached lens in the eye, a PDE6B variant causing progressive vision loss, and a FAN1 variant associated with kidney failure. The FAN1 variant was so rare it was absent from the gnomAD database, which includes more than 800,000 combined genomes and exomes.

Ioannidis noted that these populations lack genetic testing recommendations and insurance coverage for conditions not yet documented. "We don't have recommendations for genetic testing, and there's no reimbursement from insurance because these are conditions we don't even know about," he said. "This is a population that should be getting research resources and attention from geneticists even more urgently."

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Analysis

Why This Matters

The study provides the clearest genetic evidence for the origins of Native Hawaiians, resolving a long-standing question in Pacific history.
The identified mutations pose real health risks to Polynesian populations, highlighting gaps in genetic testing and healthcare equity.
The findings underscore how human exploration and isolation shaped genetic diversity, with implications for understanding founder effects in other populations.

Background

The peopling of Polynesia began over 3,000 years ago as seafaring ancestors spread across the Pacific, covering an area the size of North and South America combined. Hawaii, the only Polynesian island in the Northern Hemisphere, is among the most isolated places on Earth. Previous genetic studies have traced Polynesian migrations from Samoa to Fiji and Tonga, then eastward through the Cook Islands and Society Islands. The new study builds on that work by pinpointing the specific ancestral connections between Hawaii and Rapa Nui.

What to Watch

Whether genetic screening guidelines from bodies like the American College of Medical Genetics and Genomics will be updated to include the newly identified mutations.
Future research using expanded genomic datasets from other isolated Polynesian islands to refine the migration timeline.
Potential policy changes in Hawaii and other Pacific regions to improve access to genetic testing and insurance coverage for rare conditions.

Sources

Scientists Have Discovered Where Native Hawaiians Came From, And The Genetic Effect of Their Long Voyage · ScienceAlert
Native Hawaiians and Easter Islanders came from same 'ultravoyager' group · Live Science

Checked

10 claims in this story checked against 1 source: 5 supported.

Show each claim

Partly supportedThe headline says the study traced Native Hawaiian origins to Mangareva.ScienceAlert: “They're a bit less related to people from Mangareva Island, suggesting this locality was the ancestral launching point for the modern populations of Hawaii and Rapa Nui.”
Partly supportedThe study found that three harmful mutations arose from repeated population bottlenecks.ScienceAlert: “This eventually led to one of the dark sides of exploration: the founder effect, a genetic bottleneck in which small founding populations experience reduced genomic variation and resilience, increasing the odds of harmful mutations.”
Partly supportedHawaii and Rapa Nui are the two most isolated islands in Polynesia and have the closest genetic ties.ScienceAlert: “the closest genetic ties are between the two most-separated islands: Hawaii and Rapa Nui”
Partly supportedThe research was Stanford-led.ScienceAlert: “Alexander Ioannidis, a genetics and biomedical data science researcher at Stanford University and the study's co-senior author.”
SupportedIoannidis said, “What we uncover in this paper is where the native people of Hawaii had come from,” and, “Hawaii is the only Polynesian island in the Northern Hemisphere, so it's a long way from everything.”ScienceAlert: ““What we uncover in this paper is where the native people of Hawaii had come from,” says Alexander Ioannidis, a genetics and biomedical data science researcher at Stanford University and the study's co-senior author. “Hawaii is the only Polynesian island in the Northern Hemisphere, so it's a long way from everything.””
SupportedThe study analyzed data from 1,050 people across French Polynesia, 12 unpublished Rapa Nui genomes, and genomic data from Native Hawaiians, Samoans and Tongans in the NIH's All of Us Biobank.ScienceAlert: “They explored these genetic histories and how they relate to founder effects by analyzing previously published whole-genome sequencing data from 1,050 individuals across French Polynesia. Also, 12 unpublished genomes from Rapa Nui, and genomic data from Native Hawaiians, Samoans, and Tongans from the NIH's All of Us Biobank.”
Partly supportedThe study identified three mutations associated with autosomal recessive conditions, including a PDE6B variant that causes progressive vision loss.ScienceAlert: “The researchers described three genetic mutations recently associated with autosomal recessive conditions, meaning they require two copies of a mutated gene, one from each parent, to potentially cause a certain condition. Similarly, the gene PDE6B helps us see, but its variant can cause progressive vision loss.”
SupportedThe FAN1 variant was absent from gnomAD, which contains more than 800,000 combined genomes and exomes.ScienceAlert: “The FAN1 variant, uniquely, was not found in a single individual in the gnomAD database, which includes more than 800,000 combined genomes and exomes”
SupportedIoannidis said, “We don't have recommendations for genetic testing, and there's no reimbursement from insurance because these are conditions we don't even know about.”ScienceAlert: ““We don't have recommendations for genetic testing, and there's no reimbursement from insurance because these are conditions we don't even know about,” Ioannidis concludes.”
SupportedIoannidis said, “This is a population that should be getting research resources and attention from geneticists even more urgently.”ScienceAlert: ““This is a population that should be getting research resources and attention from geneticists even more urgently.””