Chromosome level genome assembly of the American sloughgrass (Beckmannia syzigachne)

American sloughgrass [Beckmannia syzigachne (Steud.) Fernald] is a problematic annual grass weed in winter wheat fields of China, which causes great loss of wheat yield. A lack of high-quality genome resources has hindered understanding of the Herbicide resistance characteristics and ecological adaptations. Here, we combined Illumina short read, PacBio long-read, and high-throughput chromosome conformation capture (Hi-C) sequencing technologies to generate a high-quality, chromosome-scale genome assembly of B. syzigachne. The genome assembly was 3.19 Gb in size, consisting of seven pseudo-chromosomes. The contig and scaffold N50 values were 62.2 Mb and 431.7 Mb, respectively. The genome assembly completeness was estimated at 97.1% by BUSCO assessment. Annotation revealed 36,944 protein-coding genes and 88.83% repeat sequences. This high-quality genome assembly is a valuable resource for future fundamental research and agricultural management of B. syzigachne, and provides significant new insights into the herbicide resistance as well as the adaptive evolution of B. syzigachne.