The Solanaceae species Nicotiana tabacum, an economically important crop plant cultivated worldwide, is an allotetraploid species that appeared about 200,000 years ago as the result of the hybridization of diploid ancestors of Nicotiana sylvestris and Nicotiana tomentosiformis. The previously published genome assemblies for these three species relied primarily on short-reads, and the obtained pseudochromosomes only partially covered the genomes. In this study, we generated annotated de novo chromosome-level genomes of N. tabacum, N. sylvestris, and N. tomentosiformis, which contain 3.99 Gb, 2.32 Gb, and 1.74 Gb, respectively of sequence data, with 97.6%, 99.5%, and 95.9% aligned in chromosomes, and represent 99.2%, 98.3%, and 98.5% of the near-universal single-copy orthologs Solanaceae genes. The completion levels of these chromosome-level genomes for N. tabacum, N. sylvestris, and N. tomentosiformis are comparable to other reference Solanaceae genomes, enabling more efficient synteny-based cross-species research.
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