δ-aminoaevulinic acid dehydratase(ALAD)is necessary to the biosynthesis of porphyrin compounds in all organisms.Bioinformatic approaches were employed to identify TaALADgenes,and expression analysis as well as mutation analysis based on the model plant ALAD gene sequences were conducted.A total of six ALADgenes were identified,TaALAD-A1,TaALAD-B1 and TaALAD-D1 located on the long arm of group 7 chromosomes,and TaALAD-A2,TaALAD-B2 and TaALAD-D2 located on the short arm of group 6 chromosomes.All TaALAD genes...