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Fructans are major nonstructural carbohydrates in wheat(Triticum aestivum L.).Fructan 1-fructosyltransferase(1-FFT)is the key enzyme in fructan biosynthesis.In this study,we analyzed the single nucleotide polymorphism(SNP)on 1-FFT-A1 locus in a diversity population of 25 hexaploid wheat(AABBDD)accessions and one wheat relative species UR208(AA)by means of direct sequencing.A total of 96 sequence variants were detected in the 1-FFT-A1 gene,and 15 of them result in amino acid substitutions,forming four haplotypes.