Identification of DNA Regions Specific to the X and Y Chromosomes in Sphaerocarpos texanus
Why this work is in the frame
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Bibliographic record
Abstract
The majority of dioecious plants are not sexually dimorphic until the onset of reproductive maturation. The inability to identify sex in pre-reproductive plants limits sex-related studies in plant populations. Molecular techniques to identify sex in seed plants have had increasing success. However, sex-specific markers in bryophytes have not yet been found. Bryophytes can be effective model systems in understanding the reproductive biology of plant species with unisexual individuals, as well as the molecular biology of sex chromosomes and sex determination. This study was specifically designed to find sex-specific markers in Sphaerocarpos texanus. The study relied on the Polymerase Chain Reaction procedure to amplify arbitrary regions of genomic DNA to locate sex-specific markers. Bulk segregant analysis using 238 decamer primers, and involving a single full-sibling pedigree was used to identify sex-specific markers. Inheritance of specific markers by male or female individuals was tested in progeny derived from two mated pairs involving individuals in the pedigree. Consistency of the markers was tested with individuals outside the original pedigree in the same population as well as with individuals from a distant population. Four markers were found—three specific to females and one specific to males.
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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 | 0.000 |
| 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 it