Chromosome-scale, haplotype-resolved genome assembly of Suaeda glauca

Suaeda glaucais an annual herb of Suaeda and an important saline-alkali plant resource, which is widespread on beaches and saline lands around the world. It is also a good candidate for food, feed, and drug development. There has been no publication of the Suaeda glaucagenome assembly, limiting the evolutionary study of Amaranthaceae and the bioavailability of Suaeda glauca.

Using PacBio HiFi and Hi-C sequencing data, we successfully generated chromosome-scale, haplotype-resolved assemblies of the Suaeda glaucagenome. The size of the final primary assembly was 622.95 Mb, and the contig N50 was 19.42 Mb, which was successfully anchored to 9 chromosomes, accounting for 96.79% of the total assembly size. The repeat content and genome size of Suaeda glaucaare much higher than those of the same genus Suaeda aralocaspica, presumably due to a recent burst of LTR insertions. Using HiFi reads, we assembled the complete circular chloroplast genome of Suaeda glauca. Through gene family and phylogenetic tree analysis, it was shown that Suaeda glaucaand Suaeda aralocaspicadifferentiated at ~26.36 million years ago (MYA), and Amaranthaceae species began to differentiate at ~52.00 MYA.