Genomic DNA extraction was performed according to TaKaRa MiniBEST Universal Genomic DNA Extraction Kit protocol. The concentration and quality of extracted DNA was determined using NanoDrop2000 spectrophotometer (Thermo Scientific, Wilmington, DE, USA), Quant-iT PicoGreen dsDNA assay kit (Thermo Fisher Scientific, Wilmington, DE, USA) and agarose gel electrophoresis. Purified genomic DNA was sequenced on PromethION according to manufacturers instructions.