@article{fdi:010097413,
  title = {{B}iological and genomic resources for the cosmopolitan phytoplankton {B}athycoccus : insights into genetic diversity and function of outlier chromosomes},
  author = {{D}ennu, {L}. and {D}evic, {M}. and {R}igonato, {J}. and {F}alciatore, {A}. and {L}ozano, {J}. and {V}erg{\'e}, {V}. and {M}ariac, {C}{\'e}dric and {J}oli, {N}. and {J}aillon, {O}. and {S}abot, {F}ran{\c{c}}ois and {B}ouget, {F}.},
  editor = {},
  language = {{ENG}},
  abstract = {{P}opulation-scale genome sequencing has become essential for exploring genetic diversity and adaptation, particularly in land plants. {I}n contrast, eukaryotic phytoplankton resources remain limited to model reference genomes or community-level metagenomics, leaving a gap in understanding intraspecific variation and evolutionary processes. {T}o address this, we developed a comprehensive biological and genomic resource for the cosmopolitan and ecologically important genus {B}athycoccus. {E}xtensive metagenomic data from across the world {O}cean are available for this genus, and previous studies have identified four {B}athycoccus species and reconstructed 34 metagenome-assembled genomes ({MAG}s). {H}ere we report 28 high-quality strain genome sequences using a combination of {O}xford {N}anopore {T}echnologies long reads and {I}llumina short reads and associated biological resources. {T}hese include 24 {B}athycoccus prasinos strains spanning a latitudinal gradient from 40 degrees to 78 degrees {N}, a reference genome for {B}athycoccus calidus, and three genomes of the recently identified {B}3 clade, which we propose as the {B}athycoccus catiminus species. {C}omparative analyses of sequenced genomes with {MAG}s highlight the complementarity between resources: {W}hile {MAG}s capture environmental diversity and uncover uncultured taxa, the cultured strain genomes provide complete, non-chimeric high-quality assemblies that resolve structural variations and haplotype-level diversity not detected in {MAG}s. {T}hese include the big outlier chromosome, a putative sexual chromosome revealing a second mating type, and extensive variability in the small outlier chromosome, associated with viral resistance and genome plasticity. {T}ogether, these biological and genomic resources establish {B}. prasinos as a powerful model for studying diversity, adaptation, and evolution of eukaryotic phytoplankton in the ocean, complementing existing global metagenomic datasets.},
  keywords = {phytoplankton ; {M}amiellophyceae ; natural diversity ; whole-genome ; sequencing ; {B}athycoccus ; structural variations ; {MEDITERRANEE} ; {MANCHE} ; {MER} {DU} {NORD} ; {ARCTIQUE} ; {OCEAN} {INDIEN}},
  booktitle = {},
  journal = {{P}lant {J}ournal},
  volume = {126},
  numero = {5},
  pages = {e70982 [21 p.]},
  ISSN = {0960-7412},
  year = {2026},
  DOI = {10.1111/tpj.70982},
  URL = {https://www.documentation.ird.fr/hor/fdi:010097413},
}