Abstract
A quantitative trait locus (QTL) that affects heading date (HD) and the number of spikelets per panicle (SPP) was previously identified in a small region on chromosome 7 in rice (Oryza sativa L.). In order to further characterize the QTL region, near isogenic lines (NILs) were quickly obtained by self-crossing recombinant inbred line 189, which is heterozygous in the vicinity of the target region. The pleiotropic effects of QTL Ghd7.1 on plant height (PH), SPP, and HD, were validated using an NIL-F2 population. Ghd7.1 explained 50.2%, 45.3%, and 76.9% of phenotypic variation in PH, SPP, and HD, respectively. Ghd7.1 was precisely mapped to a 357-kb region on the basis of analysis of the progeny of the NIL-F2 population. Day-length treatment confirmed that Ghd7.1 is sensitive to photoperiod, with long days delaying heading up to 12.5 d. Identification of panicle initiation and development for the pair of NILs showed that Ghd7.1 elongated the photoperiod-sensitive phase more than 10 d, but did not change the basic vegetative phase and the reproductive growth phase. These findings indicated that Ghd7.1 regulates SPP by controlling the rate of panicle differentiation rather than the duration of panicle development.
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
Ghd7.1 explained 50.2% of variation in PH.
- Taxon
- rice
Oryza sativae1 - Gene
- Ghd7.1e0
- Outcome
- PHe0
- Value
- 50.2%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ghd7.1 explained 50.2%, 45.3%, and 76.9% of phenotypic variation in PH, SPP, and HD, respectively”
e1“rice (Oryza sativa L.)”
Claim · model-written summary
Ghd7.1 explained 45.3% of variation in SPP.
- Taxon
- riceOryza sativae1
- Gene
- Ghd7.1e0
- Outcome
- SPPe0
- Value
- 45.3%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ghd7.1 explained 50.2%, 45.3%, and 76.9% of phenotypic variation in PH, SPP, and HD, respectively”
e1“rice (Oryza sativa L.)”
Claim · model-written summary
Ghd7.1 explained 76.9% of variation in HD.
- Taxon
- riceOryza sativae1
- Gene
- Ghd7.1e0
- Outcome
- HDe0
- Value
- 76.9%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ghd7.1 explained 50.2%, 45.3%, and 76.9% of phenotypic variation in PH, SPP, and HD, respectively”
e1“rice (Oryza sativa L.)”
Claim · model-written summary
Ghd7.1 mapped to a 357-kb region.
- Taxon
- riceOryza sativae1
- Gene
- Ghd7.1e0
- Outcome
- mappede0
- Value
- 357-kbe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ghd7.1 was precisely mapped to a 357-kb region”
e1“rice (Oryza sativa L.)”
Claim · model-written summary
Long days delayed Ghd7.1 associated heading by up to 12.5 d.
- Taxon
- riceOryza sativae1
- Treatment
- long dayse0
- Gene
- Ghd7.1e0
- Outcome
- headinge0
- Direction
- delayinge0
- Value
- 12.5 de0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Day-length treatment confirmed that Ghd7.1 is sensitive to photoperiod, with long days delaying heading up to 12.5 d”
e1“rice (Oryza sativa L.)”
Claim · model-written summary
Ghd7.1 extended the photoperiod sensitive phase by more than 10 d.
- Taxon
- riceOryza sativae1
- Gene
- Ghd7.1e0
- Outcome
- photoperiod-sensitive phasee0
- Direction
- elongatede0
- Value
- 10 de0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ghd7.1 elongated the photoperiod-sensitive phase more than 10 d”
e1“rice (Oryza sativa L.)”
Claim · model-written summary
Ghd7.1 did not change the basic vegetative phase.
- Taxon
- riceOryza sativae1
- Gene
- Ghd7.1e2
- Outcome
- basic vegetative phasee0
- Direction
- did not changee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but did not change the basic vegetative phase and the reproductive growth phase”
e1“rice (Oryza sativa L.)”
e2“Ghd7.1 elongated the photoperiod-sensitive phase more than 10 d”
Claim · model-written summary
Ghd7.1 did not change the reproductive growth phase.
- Taxon
- riceOryza sativae1
- Gene
- Ghd7.1e2
- Outcome
- reproductive growth phasee0
- Direction
- did not changee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but did not change the basic vegetative phase and the reproductive growth phase”
e1“rice (Oryza sativa L.)”
e2“Ghd7.1 elongated the photoperiod-sensitive phase more than 10 d”
Claim · model-written summary
Ghd7.1 was inferred to regulate spikelets through panicle differentiation rate.
- Taxon
- riceOryza sativae1
- Gene
- Ghd7.1e0
- Outcome
- SPPe0
- Qualifier
- controlling the rate of panicle differentiatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ghd7.1 regulates SPP by controlling the rate of panicle differentiation rather than the duration of panicle development”
e1“rice (Oryza sativa L.)”
The same questions in other papers
light · phenology · Oryza sativa (rice)Positive and negative results
9 papers in the same direction as this paper · 14 in the opposite direction
- positive
- positive
- positive
20 papers more in this group
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.