Chromosome-level genome assembly of the freshwater bivalve Anodonta woodiana.

The freshwater bivalve Anodonta (Sinanodonta) woodiana originated in the Yangtze River basin of China and is now widely distributed in Asia, Europe, North America, and Africa. This species has important economic and ecological value. Using Illumina, PacBio, and Hi-C technology, a high-quality chromosome-level genome of A. woodiana was assembled. The genome size was 2.80 Gb, with a contig N50 of 4.01 Mb and a scaffold N50 of 143.34 Mb. In total, 1609 contigs, accounting for 99.57% of the total assembled genome, were anchored into 19 chromosomes. In total, 1.51 Gb repeat sequences were annotated and 44,785 protein-coding genes were predicted. This study is the first to reveal the genome of A. woodiana and the genus Anodonta, which will effectively contribute to investigations of this species' biology, molecular mechanisms in response to environmental stress, and resource management.