Rye is a cereal grain belonging to the wheat tribe (Triticeae), which also includes barley and wheat. It is primarily grown as a grain, a forage crop for animals, and a cover crop.
The crop is cultivated extensively across an area spanning from Eastern and Northern Europe into Russia. Due to its high tolerance for poor soil and cold weather, it is particularly useful in these regions, where its vigorous growth helps suppress weeds and provides early-year forage for livestock.
Historical evidence suggests that rye arrived in Europe as a secondary crop. It likely began as a minor admixture of wheat resulting from Vavilovian mimicry before eventually being cultivated as an independent crop.