ArticleBMC genomics2026
Complete mitochondrial genomes of the two high-valued bromeliads: comparative genomics and evolutionary insights.
Article in BMC genomics, 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
backgroundThe Bromeliaceae family contains many horticulturally and economically important species, including Aechmea fasciata and pineapple (Ananas comosus). Compared to their well-studied chloroplast and nuclear genomes, the mitogenomes of bromeliads remain largely unexplored, hindering a full understanding of their organellar evolution and phylogenetic relationships. This study provides the first complete mitogenome assemblies and a comparative analysis for these two high-value bromeliads, revealing their phylogenetic affinities.
resultsOur findings suggested that the mitogenomes of Ae. fasciata and An. comosus both exhibit a simple master circle structure. They were 0.93-1.16 Mb in length, containing similar protein-coding genes (PCGs) (42-44), 39 tRNA genes, and three rRNA genes. Notably, the synonymous codons usage analysis revealed a preference for A/U endings, and a total of 542-548 RNA editing sites were detected. Most PCGs were under purifying selection, indicating a strong evolutionary constraint to preserve functional integrity. Additionally, the ATP synthase gene exhibited high nucleotide diversity, suggesting that such genes may need further investigation in the context of future CMS-related studies. Phylogenetically, analyses based on shared PCGs provided robust support for the clustering relationships within Bromeliaceae, confirming that An. comosus and Ae. fasciata form a distinct clade and are separate from Puya raimondii.
conclusionsThis study establishes a crucial comparative genomic framework for Bromeliaceae, providing valuable genetic resources for future evolutionary studies and potential marker-assisted breeding applications.
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