Isolating Microsatellite Loci: Looking Back, Looking Ahead
Bibliographic record
Abstract
Microsatellite DNA loci are tandemly repeated simple sequence repeats (SSRs) that are ubiquitous in eukaryotic genomes. When flanked by unique sequences, length variation (driven by high rates of strand slippage during DNA replication) at a given repeat locus can be assayed by PCR and electrophoretic separation of the resulting DNA fragments (representing alleles defined by fragment size or repeat number at that locus). In nonmodel organisms that do not have sequence information at SSR loci (or at SSRs in a closely related taxon), microsatellites must be isolated and sequenced de novo. Traditionally, this has been accomplished with cloning of genomic DNA fragments enriched for SSRs, a protocol described in detail here. PCR primers flanking microsatellite repeats can be used to assay repeat length variation among individuals (typically through fluorescent labeling of one strand and capillary electrophoresis), useful for questions related to population variation, individual assignment, mating studies, selection scans, mapping, and phenotypic traits. High-throughput next-generation sequencing will likely supplant traditional cloning methods for the discovery of microsatellite loci.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| 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".