Abstract
Pre-harvest sprouting (PHS) is one of the serious problems for wheat production, especially in rainy regions.Although seed dormancy is the most critical trait for PHS resistance, the control of heading time should also be considered to prevent seed maturation during unfavorable conditions.In addition, awning is known to enhance water absorption by the spike, causing PHS.In this study, we conducted QTL analysis for three PHS resistant related traits, seed dormancy, heading time and awn length, by using recombinant inbred lines from 'Zenkouji-komugi' (high PHS resistance) × 'Chinese Spring' (weak PHS resistance).QTLs for seed dormancy were detected on chromosomes 1B (QDor-1B) and 4A (QDor-4A), in addition to a QTL on chromosome 3A, which was recently cloned as TaMFT-3A.In addition, the accumulation of the QTLs and their epistatic interactions contributed significantly to a higher level of dormancy.QDor-4A is co-located with the Hooded locus for awn development.Furthermore, an effective QTL, which confers early heading by the Zenkouji-komugi allele, was detected on the short arm of chromosome 7B, where the Vrn-B3 locus is located.Understanding the genetic architecture of traits associated with PHS resistance will facilitate the marker assisted selection to breed new varieties with higher PHS resistance.
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Claims 5
Claim · model-written summary
Seed dormancy QTLs were detected on chromosomes 1B and 4A.
- Taxon
- bread wheat (Triticum aestivum L.)
Triticum aestivumt0 - Gene
- QDor-1Be0
- Outcome
- QTLs for seed dormancy were detectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“QTLs for seed dormancy were detected on chromosomes 1B (QDor-1B) and 4A (QDor-4A)”
t0“bread wheat (Triticum aestivum L.)”
Claim · model-written summary
An additional seed dormancy QTL on chromosome 3A was identified as TaMFT-3A.
- Taxon
- bread wheat (Triticum aestivum L.)Triticum aestivumt0
- Gene
- TaMFT-3Ae0
- Outcome
- a QTL on chromosome 3Ae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a QTL on chromosome 3A, which was recently cloned as TaMFT-3A”
t0“bread wheat (Triticum aestivum L.)”
Claim · model-written summary
Accumulated QTLs and their epistatic interactions contributed significantly to higher dormancy.
- Taxon
- bread wheat (Triticum aestivum L.)Triticum aestivumt0
- Gene
- QTLse0
- Outcome
- dormancye0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the accumulation of the QTLs and their epistatic interactions contributed significantly to a higher level of dormancy”
t0“bread wheat (Triticum aestivum L.)”
Claim · model-written summary
QDor-4A was co-located with the Hooded locus for awn development.
- Taxon
- bread wheat (Triticum aestivum L.)Triticum aestivumt0
- Gene
- QDor-4Ae0
- Outcome
- co-located with the Hooded locus for awn developmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“QDor-4A is co-located with the Hooded locus for awn development”
t0“bread wheat (Triticum aestivum L.)”
Claim · model-written summary
A QTL on chromosome 7B carrying the Zenkouji-komugi allele conferred early heading.
- Taxon
- bread wheat (Triticum aestivum L.)Triticum aestivumt0
- Material
- Zenkouji-komugie0
- Gene
- Vrn-B3e0
- Outcome
- early headinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an effective QTL, which confers early heading by the Zenkouji-komugi allele, was detected on the short arm of chromosome 7B, where the Vrn-B3 locus is located”
t0“bread wheat (Triticum aestivum L.)”