A burial site, marked by a pole at center left, where the remains of a boy who died more than 12,000 years ago was found in western Montana. (Mike Waters/Nature via AP)

The DNA of a baby boy who was buried in Montana 12,600 years ago has been recovered, and it provides new indications of the ancient roots of today’s American Indians and other native peoples of the Americas.

It’s the oldest genome ever recovered from the New World. Artifacts found with the body show the boy was part of the Clovis culture, which existed in North America from about 13,000 years ago to about 12,600 years ago and is named for an archaeological site near Clovis, N.M.

The boy’s genome showed his people were direct ancestors of many of today’s native peoples in the Americas, researchers of a study published last week said. He was more closely related to those in Central and South America than to those in Canada. The reason for that difference isn’t clear, scientists said.

The researchers said they had no Native American DNA from the United States available for comparison, but they assume the results would show that some Native Americans were direct descendants of the boy and others were closely related.

The DNA also indicates the boy’s ancestors came from Asia, supporting the standard idea of ancient migration to the Americas by way of a land bridge that disappeared long ago.

This undated photo provided by researcher Sarah L. Anzick shows a nearly-complete projectile point, top, a mid-stage point made of translucent quartz and an end-beveled rod of bone from a Clovis-era burial site found in 1968 in western Montana. (Sarah L. Anzick/Via AP)

The burial site, northeast of Livingston, Mont., is the only one known from the Clovis culture. The boy was between 1 year and 18 months old when he died of an unknown cause.

He was buried with 125 artifacts, including spear points and elk antler tools. Some were evidently ritual objects or heirlooms. The artifacts and the skeleton were covered with powdered red ochre, a natural pigment, indicating a burial ceremony.

The skeleton was discovered in 1968 next to a rock cliff, but it’s only in recent years that scientists have been able to recover and analyze complete genomes from such ancient samples.

One of the researchers, Shane Doyle of Montana State University, a member of the Crow tribe, said the indication of such ancient roots for American Indians fits with what many tribal people already believe. He also said plans are underway to rebury the boy’s remains at the site after the winter. The boy “was not a chief or a great hunter,” but his burial showed love and respect, Doyle said.

The researchers said that once they discovered the link between the boy and today’s Native Americans, they sought out American Indian groups to discuss the results. Eske Willerslev, an expert in deciphering ancient DNA at the University of Copenhagen, called for scientists to work closely with native peoples on such research.

Willerslev noted there were Native American groups who said their oral history showed that they were descendants of the first people in the Americas. “Well, they turned out to be right.”

— Associated Press