Identification of three QTLs that additively affect heading time in bread wheat (Triticum aestivum L.) by QTL-seq approach

Optimizing the timing of heading is crucial for achieving stable production in bread wheat ( Triticum aestivum L.). We analyzed a breeding line, ‘B1-0393’, that headed 5 days earlier than the Japanese elite cultivar ‘Kitahonami’. To identify quantitative trait loci (QTLs) responsible for this differ...

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Bibliographic Details
Published in:Euphytica 2024-12, Vol.220 (12), p.183, Article 183
Main Authors: Komura, Shoya, Kobayashi, Fuminori, Oono, Youko, Handa, Hirokazu, Inoue, Yoshihiro, Yoshida, Kentaro
Format: Article
Language:English
Subjects:
Agricultural production
Alleles
Biomedical and Life Sciences
Biotechnology
Chromosomes
Crop science
Crop yield
Cultivars
Gene mapping
Genes
Genetic crosses
Genetic engineering
Genomes
Life Sciences
Optimization
Phenotypic variations
Photoperiods
Plant breeding
Plant Genetics and Genomics
Plant layout
Plant Pathology
Plant Physiology
Plant Sciences
Quantitative trait loci
Triticum aestivum
Wheat
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Summary:Optimizing the timing of heading is crucial for achieving stable production in bread wheat ( Triticum aestivum L.). We analyzed a breeding line, ‘B1-0393’, that headed 5 days earlier than the Japanese elite cultivar ‘Kitahonami’. To identify quantitative trait loci (QTLs) responsible for this difference, we conducted QTL-seq using F 3 progeny of a cross between ‘Kitahonami’ and ‘B1-0393’. We detected QTLs on chromosomes 2D ( QDth.kupg-2D ), 3D ( QDth.kupg-3D ), and 4A ( QDth.kupg-4A ), explaining 10.25%, 2.00%, and 8.24%, respectively, of phenotypic variance. The QDth.kupg-2D locus corresponded to the major photoperiod-regulating gene Photoperiod-D1 ( Ppd-D1 ). ‘Kitahonami’ had the photoperiod-sensitive Ppd-D1b allele and ‘B1-0393’ had the insensitive Ppd-D1a allele. QDth.kupg-4A overlapped with previously reported QTLs, while QDth.kupg-3D was a novel QTL. Segregation analysis using F 2 and F 3 plants confirmed that alleles from ‘B1-0393’ at all three loci accelerated heading and that the three QTLs had additive effects on days to heading. Our findings could be valuable for regulating the timing of heading to optimize wheat yield.
ISSN:0014-2336
1573-5060
DOI:10.1007/s10681-024-03441-z