Scientists found 53 spots in the broccoli genome where genetic variation has been wiped out — likely because breeders picked plants with certain traits so often that other versions disappeared.

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From landrace to modern hybrid broccoli: the genomic and morphological domestication syndrome within a diverse B. oleracea collection.

Cross-Sectional Study

Scientists found that modern broccoli has lost a lot of its genetic variety and has specific spots in its DNA that were strongly chosen by breeders over time—this proves it was heavily shaped by human selection during domestication.

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Source Study

From landrace to modern hybrid broccoli: the genomic and morphological domestication syndrome within a diverse B. oleracea collection.

Score: 37

DOI: 10.1038/s41438-020-00375-0

Similar Assertions

The DNA of modern broccoli has more A and T building blocks than older types — a pattern also seen in corn and soybeans, likely from long-term breeding.

83%

The broccoli we buy in stores today has much less genetic variety than the old-fashioned types grown in southern Italy, meaning farmers have lost a lot of natural diversity by breeding for uniformity.

80%

Sprouting broccoli has way more unique genetic variants than store-bought broccoli, making it a treasure trove for breeders trying to add new traits.

75%

A specific spot on broccoli’s 9th chromosome — which controls when it flowers and how it handles heat — has been heavily selected by breeders, making it a key target for improvement.

73%