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Nymphoides indica, an aquatic plant, is an invasive species that causes both ecological and economic damage in North America and elsewhere. However, the lack of genomic data of N. indica limits the in-depth analysis of this invasive species. Here, we report a chromosome-level genome assembly of nine pseudochromosomes of N. indica with a total size of ∼ 520 Mb. More than half of the N. indica genome consists of transposable elements (TEs), and a higher density of TEs around genes may play a significant role in response to an ever-changing environment by regulating the nearby gene. Additionally, our analysis revealed that N. indica only experienced a gamma (γ) whole-genome triplication event. Functional enrichment of the N. indica-specific and expanded gene families highlighted genes involved in the responses to hypoxia and plant-pathogen interactions, which may strengthen the ability to adapt to external challenges and improve ecological fitness. Furthermore, we identified 160 members of the nucleotide-binding site and leucine-rich repeat gene family, which may be linked to the defence response. Collectively, the high-quality N. indica genome reported here opens a novel avenue to understand the evolution and rapid invasion of Nymphoides spp.

dna research

Chromosome-level genome assembly of the aquatic plant <i>Nymphoides indica</i> reveals transposable element bursts and NBS-LRR gene family expansion shedding light on its invasiveness

Chromosome-level genome assembly of the aquatic plant Nymphoides indica reveals transposable element bursts and NBS-LRR gene family expansion shedding light on its invasiveness