AUTHORCONTRIBUTIONS
P.Z conceived and designed the study. F.Y., and P.Z. collected the samples. P.Z. took the morphology picture of Chinese walnut. F.Y., P.P.C., R.M.X., R.X.S., Y.J.Y., and G.Y. and performed the experiments. F.Y., R.X.S., and P.Z. analyzed and interpreted the assembly and annotations. F.Y., P.P.C., M.D., G.Y., and M.Y. supported the software. F.Y. and P. Z. performed the comparative genome analysis. F.Y., and P.Z. performed the whole genome duplication analysis. F.Y., and P.Z. wrote the draft manuscript and then P.Z. and K.W. edited and revised the English writing of this manuscript. All authors contributed and approved the final manuscript.