Genomic sequencing of wheat can be simplified through constructing chromosome specific library. Synchronization of cells is propitious to high mitosis index (MI), which results in the accumulation of metaphase chromosomes and a successful flow sorting. In the present study, we used a double-blocked strategy in the synchronization treatment of wheat (Triticum aestivum L. cv. Chinese Spring) root-tip cells with 50 μmol L?1 hydroxyurea (HU) and 100 μmol L?1 trifluralin. The effects of treatments were evaluated...