Genomic Variation Underpins Genetic Divergence and Differing Salt Resilience in <i>Sesbania bispinosa</i>
Bibliographic record
Abstract
Halophytes possess inherent stress resilience and diverse adaptations, making them valuable genetic reservoirs for crop breeding. The leguminous halophyte Sesbania bispinosa is a valuable forage crop that thrives in saline soils. To explore its salt tolerance, high-quality genome assemblies is generated for the salt-tolerant S. bispinosa accession SbTA02 and the salt-sensitive accession SbSA44. Genomic analysis revealed that the genomic divergence between the two accessions primarily originates from their pericentromeric and centromeric regions, which contain the two largest inversions: a >27-Mb inversion on chromosome 5 and a ≈49-Mb inversion on chromosome 6. Population-level analysis revealed that the 27-Mb inversion is widespread in S. bispinosa, dividing the tested populations into inland and coastal groups. These groups have many genetic divergence regions (GDRs), with genetically isolated haplotypes in the middle section of chromosome 5, including the large inversion and centromeric regions. Genome-wide association studies (GWAS) identified significant salt-tolerance signals in the GDRs, pinpointing the anthocyanidin synthase gene SbANS. Natural variation in SbANS is associated with differences in salt tolerance between salt-tolerant and salt-sensitive S. bispinosa accessions. These findings provide insights into the genomic evolution of the Sesbania genus and shed light on how genomic variation shapes genome architecture, genetic divergence, and phenotypic differentiation.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".