The important difference is that the gene contribution from the southern American group, mainly discovered on Easter Island, increased in proportion to the genetic material of European origin. When the researchers examined the DNA samples from the Pacific Ocean, they were surprised to find genetic material from both groups in the native Polynesian islanders from the easternmost Pacific islands. The southern group covered the indigenous peoples of southern Chile, such as the Mapuche people. The central group included DNA tests from indigenous groups from Mexico to northern Chile, including groups such as Zapotecs and Aymaras.
The researchers also analysed DNA taken from large numbers of Native American groups, from tropical Mexico in the north to the cool southernmost part of Chile.īased on DNA sequences that were characteristic of the various samples, they divided the indigenous peoples into two main groups - a "central" and a "southern" group. The research team collected DNA tests from 166 of the Easter Island's indigenous people, as well as from 188 Polynesians from islands across the vast Pacific Ocean. The researchers started with DNA testing, the same tool that over the years initially helped debunk Heyerdahl's theory.
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