Evidence map›Paper›PMID 22711828›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2012

ZmCCT and the genetic basis of day-length adaptation underlying the postdomestication spread of maize.

Hsiao-Yi Hung, Laura M Shannon, Feng Tian, Peter J Bradbury, Charles Chen, Sherry A Flint-Garcia, Michael D McMullen, Doreen Ware, Edward S Buckler, John F Doebley and 1 more

Open access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 174 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
174citing papers in PubMed, 1 pooled it
13.2field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

174 citing papers in PubMed, 1 synthesis or guideline pooled it, 339 citations in OpenAlex.

  1. CCT domain-containing genes in cereal crops: flowering time and beyond.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2020
    Pooled it
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  6. Hybrid origin and phenotype evolution of the modern maize.Journal of integrative plant biology · 2026
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  15. A Trypsin-Like Serine Protease ZmNAL1a Fine-Tunes Maize Floral Transition and Flowering Time.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026
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114 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

11 authors at 6 institutions in 2 countries.

Hsiao-Yi HungDepartment of Crop Science, North Carolina State University, Raleigh, NC 27695, USA.
Laura M Shannon
Feng Tian
Peter J Bradbury
Charles Chen
Sherry A Flint-Garcia
Michael D McMullen
Doreen Ware
Edward S Buckler
John F Doebley
James B Holland
Cornell University · USUnited States Department of Agriculture · USUniversity of Wisconsin–Madison · USAgricultural Research Service · USNorth Carolina State University · USUniversity of Missouri · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Teosinte, the progenitor of maize, is restricted to tropical environments in Mexico and Central America. The pre-Columbian spread of maize from its center of origin in tropical Southern Mexico to the higher latitudes of the Americas required postdomestication selection for adaptation to longer day lengths. Flowering time of teosinte and tropical maize is delayed under long day lengths, whereas temperate maize evolved a reduced sensitivity to photoperiod. We measured flowering time of the maize nested association and diverse association mapping panels in the field under both short and long day lengths, and of a maize-teosinte mapping population under long day lengths. Flowering time in maize is a complex trait affected by many genes and the environment. Photoperiod response is one component of flowering time involving a subset of flowering time genes whose effects are strongly influenced by day length. Genome-wide association and targeted high-resolution linkage mapping identified ZmCCT, a homologue of the rice photoperiod response regulator Ghd7, as the most important gene affecting photoperiod response in maize. Under long day lengths ZmCCT alleles from diverse teosintes are consistently expressed at higher levels and confer later flowering than temperate maize alleles. Many maize inbred lines, including some adapted to tropical regions, carry ZmCCT alleles with no sensitivity to day length. Indigenous farmers of the Americas were remarkably successful at selecting on genetic variation at key genes affecting the photoperiod response to create maize varieties adapted to vastly diverse environments despite the hindrance of the geographic axis of the Americas and the complex genetic control of flowering time.

Indexed as

AllelesChromosome MappingChromosomes, PlantGenes, PlantGenetic VariationGenome-Wide Association StudyGenotypeHaplotypesMexicoModels, GeneticPhenotypePhotoperiodPlant ProteinsQuantitative Trait LociRepressor ProteinsTime FactorsPlant ProteinsRepressor Proteins

Identifiers

PMID22711828
PMCPMC3396540
OpenAlexW1964716921

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.