Draft genome assembly of a Japanese Oikopleura dioica male individual, using Nanopore long reads.

Genome sequence reads produced on a MinION sequencer (Oxford Nanopore Technologies) using high-molecular weight DNA from a male individual of the Oikopleura dioica species of zooplankton. The individual was related to the laboratory strain established from a western Japanese population that was used to produce the OSKA2016 reference genome (data released elsewhere). The raw reads submitted here were basecalled with the Guppy software version 3.3.0 using its dna_r9.4.1_450bps algorithm, and are also provided in raw FAST5 format to support re-basecalling with improved algorithms. A draft assembly was made with the Flye software version 2.7 with the options --genome-size 65m and --min-overlap 3000. This draft assembly was used to validate the chrY scaffolds of the OSKA2016 reference genome. It is provided for the reproducibility of this work; please note that no further polishing has been done to correct sequencing errors.