Abstract
Increasing economic interest in Jatropha curcas requires a major research focus on the genetic background and geographic origin of this non-edible biofuel crop. To determine the worldwide genetic structure of this species, amplified fragment length polymorphisms, inter simple sequence repeats, and novel single nucleotide polymorphisms (SNPs) were employed for a large collection of 907 J. curcas accessions and related species (RS) from three continents, 15 countries and 53 regions. PCoA, phenogram, and cophenetic analyses separated RS from two J. curcas groups. Accessions from Mexico, Bolivia, Paraguay, Kenya, and Ethiopia with unknown origins were found in both groups. In general, there was a considerable overlap between individuals from different regions and countries. The Bayesian approach using STRUCTURE demonstrated two groups with a low genetic variation. Analysis of molecular varience revealed significant variation among individuals within populations. SNPs found by in silico analyses of Δ12 fatty acid desaturase indicated possible changes in gene expression and thus in fatty acid profiles. SNP variation was higher in the curcin gene compared to genes involved in oil production. Novel SNPs allowed separating toxic, non-toxic, and Mexican accessions. The present study confirms that human activities had a major influence on the genetic diversity of J. curcas, not only because of domestication, but also because of biased selection.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
Analyses separated related species from two Jatropha curcas groups.
- Taxon
- Jatropha curcas
_tree_at_Samedha.jpg?width=60)
Jatropha curcast0 - Outcome
- separated RS from two J. curcas groupse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_tree_at_Samedha.jpg?width=500)
Verbatim
e0“PCoA, phenogram, and cophenetic analyses separated RS from two J. curcas groups”
t0“Jatropha curcas”
Claim · model-written summary
Accessions from five named countries with unknown origins occurred in both groups.
- Taxon
- Jatropha curcasJatropha curcast0
- Material
- Accessionse0
- Outcome
- found in both groupse0
- Setting
- Mexico, Bolivia, Paraguay, Kenya, and Ethiopiae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Accessions from Mexico, Bolivia, Paraguay, Kenya, and Ethiopia with unknown origins were found in both groups”
t0“Jatropha curcas”
Claim · model-written summary
Individuals from different regions and countries overlapped considerably.
- Taxon
- Jatropha curcasJatropha curcast0
- Outcome
- considerable overlap between individuals from different regions and countriese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was a considerable overlap between individuals from different regions and countries”
t0“Jatropha curcas”
Claim · model-written summary
STRUCTURE analysis found two groups with low genetic variation.
- Taxon
- Jatropha curcasJatropha curcast0
- Outcome
- two groups with a low genetic variatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Bayesian approach using STRUCTURE demonstrated two groups with a low genetic variation”
t0“Jatropha curcas”
Claim · model-written summary
Individuals within populations showed significant genetic variation.
- Taxon
- Jatropha curcasJatropha curcast0
- Outcome
- variation among individuals within populationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Analysis of molecular varience revealed significant variation among individuals within populations”
t0“Jatropha curcas”
Claim · model-written summary
SNPs in Δ12 fatty acid desaturase indicated possible changes in gene expression and fatty acid profiles.
- Taxon
- Jatropha curcasJatropha curcast0
- Gene
- Δ12 fatty acid desaturasee0
- Outcome
- possible changes in gene expression and thus in fatty acid profilese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SNPs found by in silico analyses of Δ12 fatty acid desaturase indicated possible changes in gene expression and thus in fatty acid profiles”
t0“Jatropha curcas”
Claim · model-written summary
SNP variation was higher in curcin than in oil production genes.
- Taxon
- Jatropha curcasJatropha curcast0
- Gene
- curcin genee0
- Outcome
- SNP variatione0
- Direction
- highere0
- Comparator
- genes involved in oil productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SNP variation was higher in the curcin gene compared to genes involved in oil production”
t0“Jatropha curcas”
Claim · model-written summary
Novel SNPs separated toxic, non-toxic and Mexican accessions.
- Taxon
- Jatropha curcasJatropha curcast0
- Outcome
- separating toxic, non-toxic, and Mexican accessionse0
- Comparator
- toxic, non-toxic, and Mexican accessionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Novel SNPs allowed separating toxic, non-toxic, and Mexican accessions”
t0“Jatropha curcas”
Claim · model-written summary
The authors infer that human activities had a major influence on Jatropha curcas genetic diversity.
- Taxon
- J. curcasJatropha curcase0
- Outcome
- genetic diversity of J. curcase0
- Qualifier
- domestication, but also because of biased selectione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“human activities had a major influence on the genetic diversity of J. curcas, not only because of domestication, but also because of biased selection”
t0“Jatropha curcas”