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Common genetic control for grain filling duration and kernel weight in grain sorghum.

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Τίτλος: Common genetic control for grain filling duration and kernel weight in grain sorghum.
Συγγραφείς: Otwani D; Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, Hermitage Research Facility, Warwick, QLD, Australia. d.otwani@uq.edu.au.; Australian Research Council Centre of Excellence for Plant Success in Nature and Agriculture, The University of Queensland, St Lucia, Brisbane, QLD, 4067, Australia. d.otwani@uq.edu.au., Hunt C; Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, Hermitage Research Facility, Warwick, QLD, Australia.; Department of Primary Industries (DPI), Queensland Government, Hermitage Research Facility, Warwick, QLD, Australia.; Australian Research Council Centre of Excellence for Plant Success in Nature and Agriculture, The University of Queensland, St Lucia, Brisbane, QLD, 4067, Australia., Cruickshank A; Department of Primary Industries (DPI), Queensland Government, Hermitage Research Facility, Warwick, QLD, Australia., Tao Y; Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, Hermitage Research Facility, Warwick, QLD, Australia.; Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, 518120, Guangdong, China., Koltunow AMG; Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, St Lucia, QLD, Australia., Jordan D; Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, Hermitage Research Facility, Warwick, QLD, Australia. david.jordan@uq.edu.au.; Australian Research Council Centre of Excellence for Plant Success in Nature and Agriculture, The University of Queensland, St Lucia, Brisbane, QLD, 4067, Australia. david.jordan@uq.edu.au., Mace E; Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, Hermitage Research Facility, Warwick, QLD, Australia. emma.mace@uq.edu.au.; Department of Primary Industries (DPI), Queensland Government, Hermitage Research Facility, Warwick, QLD, Australia. emma.mace@uq.edu.au.; Australian Research Council Centre of Excellence for Plant Success in Nature and Agriculture, The University of Queensland, St Lucia, Brisbane, QLD, 4067, Australia. emma.mace@uq.edu.au.
Πηγή: TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik [Theor Appl Genet] 2026 Oct 12; Vol. 139 (11). Date of Electronic Publication: 2026 Oct 12.
Τύπος έκδοσης: Journal Article
Γλώσσα: English
Στοιχεία περιοδικού: Publisher: Springer Country of Publication: Germany NLM ID: 0145600 Publication Model: Electronic Cited Medium: Internet ISSN: 1432-2242 (Electronic) Linking ISSN: 00405752 NLM ISO Abbreviation: Theor Appl Genet Subsets: MEDLINE
Imprint Name(s): Original Publication: Berlin, New York, Springer
Ιατρικοί όροι (MeSH): Sorghum*/genetics , Sorghum*/growth & development , Seeds*/growth & development , Seeds*/genetics , Edible Grain*/genetics , Edible Grain*/growth & development , Quantitative Trait Loci*, Haplotypes ; Phenotype ; Genotype ; Polymorphism, Single Nucleotide ; Chromosome Mapping ; Genome-Wide Association Study ; Plant Breeding ; Genetic Markers ; Genetic Variation
Περίληψη: Key Message: The genetic control of GFD in sorghum closely overlaps with that of grain size, is influenced by both pre- and post-anthesis processes, offering new opportunities for yield improvement through targeted breeding and inter-racial trait introgression. The duration of the grain filling period has been associated with yield increases in cereals including maize and sorghum. The genetic control of grain filling duration (GFD) is however not known in sorghum. This study explored the genetic variation and extent of genetic control for GFD in a diverse panel of sorghum genotypes (n=904), in three environments across two years. A genome wide association analysis revealed 86 QTLs, 46 of which collocated with 54 previously reported grain size candidate genes in sorghum, indicating a significant enrichment. Single marker analysis revealed that genomic regions associated with GFD were similarly associated with grain size. Interestingly, in silico expression analysis of candidate genes associated with GFD revealed that GFD could be associated with processes that happen both before and after anthesis contrary to the understanding that GFD was primarily associated with processes that happen post anthesis. Haplotype analysis of SbGS3 resolved 8 haplotypes associated with grain filling duration, 2 of which were exclusive to the Guinea and Asian durra racial groups revealing opportunities for trait introgression across sorghum racial groups. These results indicate considerable opportunity to increase grain yield in sorghum, by selecting for longer GFD and diverse inter racial crosses to improve the genetic diversity for GFD in sorghum. Sorghum breeders will find application of these results in diversifying trait selection to optimise yields in changing environments.
(© 2026. The Author(s).)
Competing Interests: Declarations. Conflict of interest: Non declared.
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Substance Nomenclature: 0 (Genetic Markers)
Entry Date(s): Date Created: 20261012 Date Completed: 20261012 Latest Revision: 20261015
Update Code: 20261015
PubMed Central ID: PMC13658289
DOI: 10.1007/s00122-026-05409-0
PMID: 42862358
Βάση Δεδομένων: MEDLINE
Περιγραφή
ISSN:1432-2242
DOI:10.1007/s00122-026-05409-0