Abstract
Mitochondrial DNA, often a forgotten or neglected tool for genetic genealogists, came roaring back into view in 2025. Mitotree, five years in the making, was released, along with multiple updates, adding more than 40,000 branches to the mitochondrial DNA phylogenetic tree. This fundamentally revises our understanding of the tree of humankind and maps the path from Mitochondrial Eve to our ancestors and then to us.
The new mtDNA Discover tool, updated weekly, provides a dozen reports explaining testers’ results in both a genealogical and historical context.
The new Mitotree rewrote the tree of humankind, incorporating the DNA of half a million testers. Refined haplogroups, plus the introduction of haplotypes and haplotype clusters, bring mitochondrial DNA into a genealogically useful timeframe. Additional tools, such as the Time Tree, the Match Time Tree, and Ancient DNA matches, combined with WikiTree integration, help genealogists place their results in context with other testers. Now, instead of just a list of full-sequence matches, testers have new, more detailed information for each match, plus a dozen new mtDNA Discover reports to determine where to focus their research.
Revised haplogroups and new haplotypes show testers how closely they are, or aren’t, related to other matches, providing new hints and research focus, including geographic locations. Join me for an overview of the new Mitotree and Discover features and how you can apply them to genealogy.
Speaker biography
Roberta Estes, MS, MBA, author of the books, DNA for Native American Genealogy and The Complete Guide to FamilyTreeDNA: Y-DNA, Mitochondrial, Autosomal and X-DNA, is a scientist, National Geographic Genographic affiliate researcher, Million Mito team member, and founding pioneer in the genetic genealogy field.
An avid 40-year genealogist, Roberta has written over 1800 articles at her popular blog, https://dna-explained.com/ , about genetic genealogy and how to combine traditional genealogy research with DNA to solve stubborn ancestor puzzles. Roberta provides consulting and analysis to major news outlets, including The Wall Street Journal and The New York Times, as well as to documentary and educational producers such as the History Channel, and regularly presents at major genealogy conferences, including RootsTech.