原级：lineage
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1. 血统,世系：Domains:域 | Lineages:血统,世系 | Proteobacteria:蛋白细菌
1. They created a " family tree " that traces the different DNA lineages found in today's Native Americans.
2. The researchers created a " family tree " that traces the different mitochondrial DNA lineages found in today's Native Americans.
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3. The work confirms previous indications of the six maternal lineages, he said.