ArticleDNA research : an international journal for rapid publication of reports on genes and genomes2026
Chromosome-scale genome assembly of Malcolmia littorea using long-read sequencing and single-pollen genotyping technologies.
Article in DNA research : an international journal for rapid publication of reports on genes and genomes, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Malcolmia littorea, a member of the family Brassicaceae, is adapted to coastal and sandy environments and has become a model in studies of reproductive barriers. However, genomic resources for the species are limited. Here, with the aim of understanding the molecular mechanisms underlying key traits in M. littorea, we present a de novo genome assembly consisting of 10 chromosome-scale sequences. We employed a high-fidelity long-read sequencing technology for genome assembly. To anchor the sequences to chromosomes, we developed a single-pollen genotyping method to construct a genetic linkage map based on SNPs derived from transcriptomes of pollen grains, possessing recombinant haploid genomes. We built a genome assembly consisting of 10 chromosome-scale sequences (215 Mb in total) for M. littorea containing 30,266 predicted genes. A comparative genome analysis and gene prediction indicated that the genome of M. littorea is double the size of the Arabidopsis thaliana genome, consistent with a whole-genome duplication followed by gene subfunctionalization and/or neofunctionalization in M. littorea. This study provides a basis for research on M. littorea, an understudied species with ecological and evolutionary significance.
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