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Record W2015541647 · doi:10.2135/cropsci2004.7180

Gene Flow in Wheat at the Field Scale

2004· article· en· W2015541647 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.
aboutThe title or abstract carries a Canadian signal from the geographic lexicon.

Bibliographic record

VenueCrop Science · 2004
Typearticle
Languageen
FieldAgricultural and Biological Sciences
TopicGenetically Modified Organisms Research
Canadian institutionsUniversity of Saskatchewan
FundersMonsanto Company
KeywordsBiologyGene flowInterspecific competitionPollinatorTransectAleuronePollenBotanyGeneEcologyGeneticsPollinationGenetic variation

Abstract

fetched live from OpenAlex

In wheat ( Triticum L.), large‐scale field studies were conducted to assess the level of intra‐ and interspecific pollen‐mediated gene movement that may exist at varying distances from a pollinator source. The objectives of this research were to measure gene flow rates from a blue‐grained pollinator ( T. aestivum cv. Purendo‐38) to (i) red‐grained spring wheat cv. CDC Teal ( T. aestivum ) over distances of 0.2 to 160 m, (ii) amber durum wheat cv. AC Navigator ( T. turgidum L.) over distances of 0.2 to 260 m, and (iii) CDC Teal and AC Navigator over distances of 180 to 2760 m. In 2000 and 2001, 50‐ by 50‐m blue‐grained pollinator blocks were sown and surrounded by recipient fields of either CDC Teal or AC Navigator at Saskatoon, SK. At maturity, 0.5‐ by 4‐m strips were harvested at specified distances between 0.2 and 160 m or 260 m along eight transects (N, E, S, W, NE, SE, SW, NW) radiating out from Purendo‐38. In addition, random sampling was conducted in 2000 and 2001 from surrounding wheat fields to estimate gene flow rates over distances of 180 to 2760 m. Gene flow from Purendo‐38 to recipient plants was identified by the expression of a light‐blue pigment in the aleurone layer of F 1 hybrid seed. Confirmed intra‐ and interspecific pollen‐mediated gene flow rates remained below 0.5% and declined rapidly with distance from the pollinator. Elevated gene flow rates to the N, W, and NW of the pollinator were associated with prevalent winds in 2000, but not in 2001. In 2000, long distance intraspecific gene flow was confirmed at a frequency of 0.005% at a position 300 m northwest of the pollinator. No evidence of interspecific gene flow was observed at ≥40 m from the pollinator. The results suggest that gene flow occurrence in spring wheat is relatively low but that a tolerance level of 0% transgenic wheat in nontransgenic wheat grain is unrealistic.

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.

Full frame distilled prediction

Teacher imitation

Not 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.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: Bench or experimental
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.322
Threshold uncertainty score0.666

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.001
Science and technology studies0.0000.001
Scholarly communication0.0000.000
Open science0.0010.000
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 head0.022
GPT teacher head0.261
Teacher spread0.239 · 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