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ENDO-DUPLICATIONAL MEIOSIS IN ALLIUM ODORUM

2010· article· en· W2059643011 on OpenAlexaff
ARTUR HÅKANSSON, ALBERT LEV AN

Bibliographic record

VenueHereditas · 2010
Typearticle
Languageen
FieldAgricultural and Biological Sciences
TopicChromosomal and Genetic Variations
Canadian institutionsInstitute of Genetics
Fundersnot available
KeywordsBiologyMeiosisHumanitiesGeneticsArt

Abstract

fetched live from OpenAlex

LLILTM odorurn, a species with wide distribution in temperate AsiaA and often grown in botanic gardens, has been repeatedly investigated embryologically because of its antipodal embryos.Early investigators, SCHURHOFF and HABERLANDT, seem to have studied a diploid odorum-form (2n= 16), while most later workers have found their odorum-plants to be tetraploid (2n=32).The present authors have grown forms from some twenty botanic gardens, all these odorum-forms being tetraploid.The study of herbarium specimens shows, however, that Allium odorum includes morphologically widely diverse types, of which certainly only a few are at present available in botanic gardens.KURITA (1953) concludes from the somatic chromosome morphology and from the meiotic pairing that Allium odorum is an autotetraploid.Embryologic investigation into tetraploid forms (see MODILEWSKY, 1931 , H~KANSSON, 1951) ) have shown the embryos to be formed by parthenogenesis, while undoubtedly fertilization of the polar nuclei is necessary, no endosperm developing in emasculated flowers.The antipodals usually have the appearance of a second egg apparatus, antipodal eggs also developing parthenogenetically.The zygoid chromosome number is the rule in the embryo sacs, although, exceptionally, embryo sacs with reduced chromosome number are found.MODILEWSKY (1931) describes meiosis in pmc:s and emc:s.In the latter case he finds, on the one hand, a normal meiosis leading up to ))16 Gemini)) and, on the other hand, a deviating meiosis type leading to the double number of chromosomes.Although he refers to the process involved in this chromosome doubling with the misleading term ,Restitution)) and the nucleus resulting, ))Restitutionskerna, it is quite clear from his descriptions that he does not mean an ordinary restitution mechanism.He is speaking of Beine Restitution in dem praediakinetischen Stadium, (p.36), and in his Fig. 35 a first metaphase is represented with about 32 elements, 12 -Hereditns

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not 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.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.002
Threshold uncertainty score0.003

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0010.001
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.001
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0010.000

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.

Opus teacher head0.011
GPT teacher head0.206
Teacher spread0.195 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designObservational
Domainnot available
GenreEmpirical

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".

Quick stats

Citations52
Published2010
Admission routes1
Has abstractyes

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