Spelt was an important staple food in parts of Europe from the Bronze Age to medieval times. Now it survives as a relict crop in Central Europe and northern Spain, and has also found a new market as a health food. Spelt is sometimes considered a subspecies of the closely related species common wheat (Triticum aestivum), in which case its botanical name is considered to be Triticum aestivum subsp. spelta. Like common wheat it is a hexaploid wheat, which means it has six sets of chromosomes.
Spelt has a complex history. It is a wheat species known from genetic evidence to have originated as a naturally occurring hybrid of a domesticated tetraploid wheat such as emmer wheat and the wild goat-grass Aegilops tauschii. This hybridisation must have taken place in the Near East because this is where Aegilops tauschii grows, and it must have taken place before the appearance of common or bread wheat (Triticum aestivum, a hexaploid free-threshing derivative of spelt) in the archaeological record about 8,000 years ago.[improper synthesis?]
Genetic evidence shows that spelt wheat can also arise as the result of the hybridisation of bread wheat and emmer wheat, although only at some date following the initial Aegilops-tetraploid wheat hybridisation. The much later appearance of spelt in Europe might thus be the result of a later, second, hybridisation between emmer and bread wheat. Recent DNA evidence supports an independent origin for European spelt through this hybridisation. Whether spelt has two separate origins in Asia and Europe, or single origin in the Near East, is currently unresolved.
In Greek mythology spelt (? [zeiá] in Greek) was a gift to the Greeks from the goddess Demeter. The earliest archaeological evidence of spelt is from the fifth millennium BC in Transcaucasia, north-east of the Black Sea, though the most abundant and best-documented archaeological evidence of spelt is in Europe. Remains of spelt have been found in some later Neolithic sites (2500-1700 BC) in Central Europe. During the Bronze Age, spelt spread widely in central Europe. In the Iron Age (750-15 BC), spelt became a principal wheat species in southern Germany and Switzerland, and by 500 BC, it was in common use in southern Britain.
In the Middle Ages, spelt was cultivated in parts of Switzerland, Tyrol, Germany, northern France and the southern Low Countries. Spelt became a major crop in Europe in the 9th century CE, possibly because it is husked, unlike other grains, and therefore more adaptable to cold climates and is more suitable for storage.
Spelt was introduced to the United States in the 1890s. In the 20th century, spelt was replaced by bread wheat in almost all areas where it was still grown. The organic farming movement revived its popularity somewhat toward the end of the century, as spelt requires less fertilizer. Since the beginning of the 21st century, spelt has become a common wheat substitute for making artisanal loaves of bread, kinds of pasta, and flakes. By 2014, the grain was popular in the UK with the crop being grown there as well as in Kazakhstan and Ukraine, with shortages reported.
A 100-gram (-ounce) reference serving of uncooked spelt provides 1,410 kilojoules (338 kilocalories) of food energy and is a rich source (20% or more of the Daily Value) of protein, dietary fiber, several B vitamins, and numerous dietary minerals (table). Highest nutrient contents include manganese (143% DV), phosphorus (57% DV), and niacin (46% DV). Spelt contains about 70% total carbohydrates, including 11% as dietary fibre, and is low in fat (table). Its high carbohydrate content led to it being called "marching grain" by the Romans.
Spelt contains gluten and is therefore suitable for baking, but this component also makes it unsuitable for people with gluten-related disorders, such as celiac disease,non-celiac gluten sensitivity, and wheat allergy. In comparison to hard red winter wheat, spelt has a more soluble protein matrix characterized by a higher gliadin:glutenin ratio.
In Germany and Austria, spelt loaves and rolls (Dinkelbrot) are widely available in bakeries as is spelt flour in supermarkets. The unripe spelt grains are dried and eaten as Grünkern ("green grain"). In Poland, spelt breads and flour are commonly available as health foods and easy to find in bakeries.
Spelt is currently a specialty crop, but its popularity in the past as a peasants' staple food has been attested in literature. Although today's Russian-speaking children perhaps do not know exactly what polba (spelt) looks or tastes like, they may recognize the word as something that can be made into porridge, having heard Pushkin's well-rhymed story in which the poor workman Balda asks his employer the priest "to feed me boiled spelt" ("? ? "). In Horace's Satire 2.6 (late 31-30 BC), which ends with the story of the Country Mouse and the City Mouse, the country mouse eats spelt at dinner while serving his city guest finer foods.
In The Divine Comedy of Dante Alighieri, Pietro della Vigna appears as a suicide in Circle VII, ring ii, Canto XIII of the Inferno. Pietro describes the fate awaiting souls guilty of suicide to Dante the Pilgrim and Virgil. According to Pietro, the soul of the suicide grows into a wild tree and is tormented by harpies that feast upon its leaves. Pietro likens the initial growth and transformation of the soul of the suicide to the germination of a grain of spelt (Inferno XIII, 94-102).
Spelt is also mentioned in the Bible. The seventh plague in Egypt in Exodus did not damage the harvest of wheat and spelt, as these were "late crops".Ezekiel 4:9 says: "Take thou also unto thee wheat, and barley, and beans, and lentils, and millet, and spelt, and put them in one vessel, and make thee bread thereof ...", though as noted above this is presumably a mistranslation and should be "emmer". It is mentioned again in Isaiah 28:25: "...and put in the wheat in rows and the barley in the appointed place and the spelt in the border thereof?"[non-primary source needed]