The Whole-Genome Sequencing and Hybrid Assembly of .

The hard-shelled mussel () is an economically important shellfish that has been cultivated for the last decade. Due to over-exploitation, most mussel stocks have dramatically declined. Efforts to study this species' natural distribution, genetics, breeding, and cultivation have been hindered by the lack of a high-quality reference genome. To address this, we produced a hybrid high-quality reference genome of using a long-read platform to assemble the genome and short-read, high-quality technology to accurately correct for sequence errors. The genome was assembled into 10,484 scaffolds, a total length of 1.90 Gb, and a scaffold N50 of 898 kb. annotation of the genome assembly identified a total of 42,684 genes. This accurate reference genome of provides an essential resource with the advantage of enabling the genome-scale selective breeding of . More importantly, it will also help in deciphering the speciation and local adaptation of the species.