design: High-molecular-weight DNA was extracted using a modified CTAB-based method (https://dx.doi.org/10.17504/protocols.io.b5qyq5xw) with precipitation in 40% isopropanol on glass beads. A short-insert library (400 bp) was constructed from 1 ug DNA using NEBNext dsDNA Fragmentase (M0348, NEB) and a MGIEasy Universal DNA Library Prep kit (1000006985, MGI) and was sequenced on DNBSEQ-G50 in the PE150 mode.