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Record W2030709727 · doi:10.2135/cropsci2002.1434

Likelihood‐Based Analysis of Genotype–Environment Interactions

2002· article· en· W2030709727 on OpenAlex
Rong‐Cai Yang

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 · 2002
Typearticle
Languageen
FieldAgricultural and Biological Sciences
TopicGenetics and Plant Breeding
Canadian institutionsAgriculture Food and Rural DevelopmentUniversity of Alberta
Fundersnot available
KeywordsRestricted maximum likelihoodBiologyCovarianceGene–environment interactionStatisticsMixed modelGenotypeMultivariate statisticsMultivariate analysisAnalysis of covarianceTraitScore testMaximum likelihoodGeneticsMathematicsComputer science

Abstract

fetched live from OpenAlex

Variation of genotype–environment interactions can be divided to determine whether or not the interactions involve change in genotype or cultivar ranks across environments. However, no sound statistical tests are available for such determination. In this study, the restricted maximum likelihood (REML) analysis based on the mixed models theory was used to estimate genetic parameters and to test statistically for causes of genotype–environment interactions in two wheat ( Triticum aestivum L.) crosses, Potam × Ingal and RL4137 × Ingal. The data with each cross consisted of the measurements of five quantitative traits for 144 F 3 ‐derived F 5 and F 6 lines from 48 F 2 families evaluated at Saskatoon in 1986 and 1987, respectively. The causes of family × year or line × year interactions were tested by comparing log likelihoods of reduced and full models (i.e., the family or line covariance structures with and without constraints). The REML estimation guaranteed that an estimated family or line covariance matrix was positive definite. Significant line × year interactions were detected in three traits in RL4137 × Ingal only and none involved rank changes. Significant family × year interactions were found in seven of 10 cross‐trait cases, but four of those seven cases involved change in family ranks across the 2 yr. The REML analysis allows the development of sound statistical tests for the different causes of interactions and constraining estimated genetic variances and covariances within acceptable ranges, thereby effectively removing the deficiencies with the conventional multivariate analysis of variance method.

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 categoriesInsufficient payload (model declined to judge)
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.905
Threshold uncertainty score0.998

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 studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0020.000

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 head0.041
GPT teacher head0.214
Teacher spread0.173 · 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