Breeding behavior in interspecific hybrids (Medicago falcata x M. sativa), parent stock of Rhizoma alfalfa
Bibliographic record
Abstract
Rhizoma, a new alfalfa variety possessing a distinctive spreading habit, was developed from six hybrids of a cross between the species Medicago falcata var. Don (seed parent) and Medicago sativa var. Grimm or Ontario Variegated (pollen parent). Because of its unusual origin, it differs from other alfalfa varieties grown in North America, Cytological investigations showed the falcata parent to be a low chromosome alfalfa (S = 16) and the sativa parent to be high chromosome alfalfa (S = 32). Three of the six hybrids were triploids (S = 24) and three were tetraploids (S = 32), the latter having received sixteen chromosomes from the female parent, possibly through the formation of unreduced gametes. It was concluded that the new variety Rhizoma is a permanent tetraploid hybrid (S = 32) containing an equal complement of chromosomes from each parent. Pollination and fertility studies on selected clonal lines of the F₄ generation revealed that a considerable amount of seed set under open-pollination was selfed seed and that much of the seed was being set without the aid of bees. The combining ability of the lines varied considerably and it was concluded that the effectiveness of each line as a male and female parent must be determined for a true criterion of combining ability. In addition, it was found that, in contrast to other varieties, the seed set after controlled cross-pollination did not greatly exceed the seed set after self-pollination.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".