Evidence map›Paper›PMID 33521943›Full record

ArticleThe New phytologist2021

A new Cannabis genome assembly associates elevated cannabidiol (CBD) with hemp introgressed into marijuana.

Christopher J Grassa, George D Weiblen, Jonathan P Wenger, Clemon Dabney, Shane G Poplawski, S Timothy Motley, Todd P Michael, C J Schwartz

Open access · hybridAbstract read
In one paragraph

Article in The New phytologist, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 100 papers.

0numbers the graph read from it
0cells of the map it votes in
100citing papers in PubMed
25.1field-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

100 citing papers in PubMed, 174 citations in OpenAlex.

  1. Review
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  4. Genetic Advances inPlants (Basel, Switzerland) · 2026
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  18. Sex-specific ethylene responses drive floral sexual plasticity in Cannabis sativa.The Plant journal : for cell and molecular biology · 2026
    Article
  19. Article
  20. Article

40 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

8 authors at 3 institutions in 1 country.

Christopher J GrassaSunrise Genetics Inc., Fort Collins, CO, 80525, USA.ORCID 0000-0002-2705-4872
George D WeiblenDepartment of Plant and Microbial Biology, University of Minnesota, Saint Paul, MN, 55108, USA.ORCID 0000-0002-8720-4887
Jonathan P WengerDepartment of Plant and Microbial Biology, University of Minnesota, Saint Paul, MN, 55108, USA.ORCID 0000-0002-4106-4735
Clemon DabneyDepartment of Plant and Microbial Biology, University of Minnesota, Saint Paul, MN, 55108, USA.ORCID 0000-0003-3695-7501
Shane G PoplawskiDepartment of Informatics, J. Craig Venter Institute, La Jolla, CA, 92037, USA.ORCID 0000-0002-2867-6032
S Timothy MotleyDepartment of Informatics, J. Craig Venter Institute, La Jolla, CA, 92037, USA.ORCID 0000-0001-8655-2487
Todd P MichaelDepartment of Informatics, J. Craig Venter Institute, La Jolla, CA, 92037, USA.ORCID 0000-0001-6272-2875
C J SchwartzSunrise Genetics Inc., Fort Collins, CO, 80525, USA.ORCID 0000-0001-9295-8504
J. Craig Venter Institute · USUniversity of Minnesota · USSunrise Medical (United States) · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Demand for cannabidiol (CBD), the predominant cannabinoid in hemp (Cannabis sativa), has favored cultivars producing unprecedented quantities of CBD. We investigated the ancestry of a new cultivar and cannabinoid synthase genes in relation to cannabinoid inheritance. A nanopore-based assembly anchored to a high-resolution linkage map provided a chromosome-resolved genome for CBDRx, a potent CBD-type cultivar. We measured cannabinoid synthase expression by cDNA sequencing and conducted a population genetic analysis of diverse Cannabis accessions. Quantitative trait locus mapping of cannabinoids in a hemp × marijuana segregating population was also performed. Cannabinoid synthase paralogs are arranged in tandem arrays embedded in long terminal repeat retrotransposons on chromosome 7. Although CBDRx is predominantly of marijuana ancestry, the genome has cannabidiolic acid synthase (CBDAS) introgressed from hemp and lacks a complete sequence for tetrahydrocannabinolic acid synthase (THCAS). Three additional genomes, including one with complete THCAS, confirmed this genomic structure. Only cannabidiolic acid synthase (CBDAS) was expressed in CBD-type Cannabis, while both CBDAS and THCAS were expressed in a cultivar with an intermediate tetrahydrocannabinol (THC) : CBD ratio. Although variation among cannabinoid synthase loci might affect the THC : CBD ratio, variability among cultivars in overall cannabinoid content (potency) was also associated with other chromosomes.

Indexed as

CannabidiolCannabinoidsCannabisChromosome MappingDronabinolCannabidiolCannabinoidsDronabinolcannabidiol (CBD)cannabinoidsdomesticationhempmarijuanatetrahydrocannabinol (THC)

Identifiers

PMID33521943
PMCPMC8248131
OpenAlexW3128591147

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.