Agrobiodiversity, pangenomes and the future of food

Comparing commonly grown species and native varieties is a winning strategy for making the former more resilient and the latter more productive.

You all know tomatoes and potatoes. African eggplants, maybe not—but when ripe, they turn red just like tomatoes. The lulo, for its part, is an orange fruit with citrusy notes, which is why in Ecuador it’s called naranjilla, or “little orange.” The Andean pepino, on the other hand, has juicy flesh that makes it resemble a melon. Their sizes, colors, and flavors may vary, but all of these plants belong to the same taxonomic group. In fact, they represent some of the species sequenced to produce a remarkable collection of related genomes—remarkable because it aims to span the entire Solanum genus.

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Check out the pangenome, the graph of us all

The new pangenome reference is a collection of different genomes from which to compare an individual genome sequence. Like a map of the subway system, the pangenome graph has many possible routes for a sequence to take, represented by the different colors. Credit: Darryl Leja, NHGRI

We used to imagine DNA as the book of life, the code, the Rosetta stone of Homo sapiens. But the repertoire of metaphors needs updating. Today, our species portrait has taken on the appearance of a network of nodes and relationships. Welcome to the age of the pangenome: the collective genome (pan in Greek means everything) that aspires to become more and more complex, plural, cosmopolitan and inclusive.

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