AUTHOR CONTRIBUTIONS
X.C., K.K. and H.C. designed and led the project. N.L. and P.L. collected samples and determined hormone titers. H.C., X.L. and Q.L. accomplished the whole-genome sequencing and Hi-C assembly. H.C., Q.L., Y.F., K.K. and M.C. performed whole-genome assembly quality control and methylome analyses. Q.L., W.W. and P.L. afforded photos of fresh collection and designed the figures; X.L., N.L., X.Z., Q.L. and P.L. performed the functional experiments of RNA interference. H.C., M.C. and X.C. wrote the manuscript.; M.C. and K.K. improved the manuscript. All authors read and approved the final manuscript.