ArticleScientific data2026
Chromosome-level genome assembly of the Amazonian native fish red-bellied pacu (Piaractus brachypomus).
Article in Scientific data, 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
Piaractus brachypomus (red-bellied pacu), native to the Amazon River Basin, is widely known for its rapid growth, disease resistance, and cost-effective feeding, which have led to its widespread introduction and high commercial value worldwide. Despite this, the lack of a reference genome has hindered both genetic and evolutionary studies, as well as the genetic improvement of aquaculture traits. Here, to address this gap, we report the first chromosome-level genome assembly of P. brachypomus using PacBio HiFi long-reads and Hi-C sequencing technologies. The final genome assembly has a total size of 1.34 Gb and exhibits high continuity, with contig N50 of 40.61 Mb. Approximately 99.35% of assembled sequences were anchored into 27 chromosomes, with a BUSCO completeness score of 99.8%. Genome annotation identified 44.83% of repetitive elements and predicted 25,501 protein-coding genes with 99.2% receiving functional annotations. Overall, these findings offer a framework for evolutionary studies and genetic improvement, facilitating marker-assisted and genome-wide selection for the sustainable enhancement of P. brachypomus aquaculture stocks.
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