Wild rice carried back a microbial function domestication had partly lost
WHAT THE EVIDENCE SAYS
Researchers used two recombinant inbred populations derived from cultivated rice and wild Oryza rufipogon, microbiome profiling, QTL mapping, population genomics and transgenic experiments to identify 113 candidate plant genes associated with core bacterial taxa. A wild-rice receptor-like kinase, OsRLK, was linked to Acinetobacter recruitment. Knockout and overexpression lines inoculated with a synthetic Acinetobacter community supported a functional role in nitrogen uptake, and field trials of the overexpression line improved yield-related traits.
WHY IT MATTERS / OUR READ
Crop domestication changed more than plant genomes; it also changed the microbial relationships those genomes assemble. This work moves beyond a correlation between microbiome composition and crop performance by connecting a host locus, a microbial partner and a nutrient-use function.
CAVEATS / UNCERTAINTY
The mechanism was validated around one focal locus and a synthetic microbial community, and practical breeding still requires testing across cultivars, soils and environments. The authors also note possible linkage and immune-regulation tradeoffs; improved yield-related traits are not yet a universal agronomic prescription.
SOURCE
Nature Microbiology — primary study
View original evidence ↗
Genetic mapping, transgenic validation and field trials linked a wild-rice receptor-like kinase to recruitment of Acinetobacter that improved nitrogen-use efficiency and yield-related traits.
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