Genetic and phenological variation of tocochromanol(vitamin E)content in wild(Daucus carota L.var.carota)and domesticated carrot(D.carota L.var.sativa)

Carrot roots(Daucus carota L.var.sativa)produce tocochromanol compounds,collectively known as vitamin E.However,little is known about their types and amounts.Here we determined the range and variation in types and amounts of tocochromanols in a variety of cultivated carrot accessions throughout carrot postharvest storage and reproductive stages and in wild-type roots(Daucus carota L.var.carota).Of eight possible tocochromanol compounds,we detected and quantified α-,and the combined peak for β-and γ-forms of tocopherols and tocotrienols.Significant variation in amounts of tocochromanol compounds was observed across accessions and over time.Large increases in a-tocopherol were noted during both reproductive growth and the postharvest stages.The variation of tocochromanols in carrot root tissue provides useful information for future research seeking to understand the role of these compounds in carrot root tissue or to breed varieties with increased levels of these compounds.