Abstract
Pearl millet plays a major role in food security in arid and semi-arid areas of Africa and India. However, it lags behind the other cereal crops in terms of genetic improvement. The recent sequencing of its genome opens the way to the use of modern genomic tools for breeding. Our study aimed at identifying genetic components involved in early drought stress tolerance as a first step toward the development of improved pearl millet varieties or hybrids. A panel of 188 inbred lines from West Africa was phenotyped under early drought stress and well-irrigated conditions. We found a strong impact of drought stress on yield components. This impact was variable between inbred lines. We then performed an association analysis with a total of 392,493 SNPs identified using Genotyping-by-Sequencing (GBS). Correcting for genetic relatedness, genome wide association study identified QTLs for biomass production in early drought stress conditions and for stay-green trait. In particular, genes involved in the sirohaem and wax biosynthesis pathways were found to co-locate with two of these QTLs. Our results might contribute to breed pearl millet lines with improved yield under drought stress.
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Claims 5
Claim · model-written summary
Early drought strongly affected pearl millet yield components.
- Taxon
- pearl millet
Cenchrus americanust0 - Treatment
- drought stresse0
- Outcome
- yield componentse0
- Comparator
- well-irrigated conditionse1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We found a strong impact of drought stress on yield components.”
e1“well-irrigated conditions”
t0“Response to early drought stress and identification of QTLs controlling biomass production under drought in pearl millet”
Claim · model-written summary
The drought impact on yield components varied among inbred lines.
- Taxon
- pearl milletCenchrus americanust0
- Material
- inbred linese0
- Outcome
- impacte0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This impact was variable between inbred lines.”
t0“Response to early drought stress and identification of QTLs controlling biomass production under drought in pearl millet”
Claim · model-written summary
Genome-wide association identified QTLs for biomass production under early drought.
- Taxon
- pearl milletCenchrus americanust0
- Gene
- QTLse0
- Outcome
- QTLs for biomass production in early drought stress conditionse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“genome wide association study identified QTLs for biomass production in early drought stress conditions”
t0“Response to early drought stress and identification of QTLs controlling biomass production under drought in pearl millet”
Claim · model-written summary
Genome-wide association identified QTLs for stay-green.
- Taxon
- pearl milletCenchrus americanust0
- Gene
- QTLse1
- Outcome
- stay-green traite1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“and for stay-green trait”
e1“genome wide association study identified QTLs for biomass production in early drought stress conditions and for stay-green trait”
t0“Response to early drought stress and identification of QTLs controlling biomass production under drought in pearl millet”
Claim · model-written summary
Genes in sirohaem and wax biosynthesis pathways co-located with two QTLs.
- Taxon
- pearl milletCenchrus americanust0
- Gene
- genes involved in the sirohaem and wax biosynthesis pathwayse0
- Outcome
- co-locate with two of these QTLse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“genes involved in the sirohaem and wax biosynthesis pathways were found to co-locate with two of these QTLs”
t0“Response to early drought stress and identification of QTLs controlling biomass production under drought in pearl millet”
The same questions in other papers
drought · yield · Cenchrus americanus (pearl millet)Positive and negative results
16 papers in the same direction as this paper · 7 in the opposite direction
- no effect
- positive
- positive
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See all 24 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.