From lemons to kumquats, roots of citrus variety dug up

Mix of male and female chloroplast DNA reveals rapid hybridization, new citrus family tree shows

Citrus fruits

CITRUS BOWL  The most detailed genetic analysis of citrus fruits to date reveals the maternal lineage and hints about who the daddies of some hybrid varieties might have been.

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The mother of all citrus plants lived about 13 million years ago, scientists have learned by tracing the maternal side of the citrus family tree.