Extracted genomic DNA was firstly fragmented by sonication to a size of 350 bp, before being end-repaired, A-tailed, and adaptor-ligated using the NEBNext® ΜLtra™ DNA Library Prep Kit for Illumina (NEB, USA) according to the preparation protocol. DNA fragments with lengths of 300–400 bp were amplified by PCR. Finally, PCR products were purified using the AMPure XP system (Beckman Coulter, Brea, CA, USA), and the libraries were analyzed for size distribution using a 2100 Bioanalyzer (Agilent, Santa Clara, CA, USA) and quantified using real-time PCR. Genome sequencing was performed using the Illumina NovaSeq 6000 sequencer with paired-end technology (PE 150) [22].
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