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James Simmonds
John Innes Centre
36Publications
18H-index
1,199Citations
Publications 36
Newest
#1Philippa Borrill (University of Birmingham)H-Index: 13
#2Sophie A. Harrington (Norwich Research Park)H-Index: 4
Last.Cristobal Uauy (Norwich Research Park)H-Index: 38
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Senescence is a tightly regulated developmental program coordinated by transcription factors. Identifying these transcription factors in crops will provide opportunities to tailor the senescence process to different environmental conditions and regulate the balance between yield and grain nutrient content. Here, we use ten time points of gene expression data along with gene network modeling to identify transcription factors regulating senescence in polyploid wheat ( Triticum aestivum ). We obser...
Previously, we identified a quantitative trait locus on the group 4 chromosomes of Aegilops and bread wheat that controls B-type starch-granule content. Here, we identify a candidate gene by fine-mapping in Aegilops and confirm its function using wheat TILLING mutants. This gene is orthologous to the FLOURY ENDOSPERM 6 (FLO6) gene of rice and barley and the PTST2 gene of Arabidopsis. In Triticeae endosperm, reduction in the gene dose of functional FLO6 alleles results in reduction, or loss, of B...
#1Jemima Brinton (JIC: John Innes Centre)H-Index: 5
#2James Simmonds (JIC: John Innes Centre)H-Index: 18
Last.Cristobal Uauy (JIC: John Innes Centre)H-Index: 38
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There is an urgent need to increase global crop production. Identifying and combining specific genes controlling distinct biological processes holds the potential to enhance crop yields. Transcriptomics is a powerful tool to gain insights into the complex gene regulatory networks that underlie such traits, but relies on the availability of a high-quality reference sequence and accurate gene models. Previously, we identified a grain weight QTL on wheat chromosome 5A (5A QTL) which acts during ear...
#1Sreya Ghosh (Norwich Research Park)H-Index: 5
#2Amy Watson (UQ: University of Queensland)H-Index: 5
Last.Phon Green (Norwich Research Park)H-Index: 5
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‘Speed breeding’ (SB) shortens the breeding cycle and accelerates crop research through rapid generation advancement. SB can be carried out in numerous ways, one of which involves extending the duration of plants’ daily exposure to light, combined with early seed harvest, to cycle quickly from seed to seed, thereby reducing the generation times for some long-day (LD) or day-neutral crops. In this protocol, we present glasshouse and growth chamber–based SB approaches with supporting data from exp...
#1Wei Wang (KSU: Kansas State University)H-Index: 3
#2James Simmonds (JIC: John Innes Centre)H-Index: 18
Last.Eduard Akhunov (KSU: Kansas State University)H-Index: 41
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Key message CRISPR-Cas9-based genome editing and EMS mutagenesis revealed inter-cultivar differences and additivity in the contribution of TaGW2 homoeologues to grain size and weight in wheat.
#1Alessia Comastri (University of Parma)H-Index: 2
#2Michela JanniH-Index: 12
Last.Nelson Marmiroli (University of Parma)H-Index: 34
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Wheat breeding nowadays must address producers and consumers’ desire. According to the last FAO report, a dramatic decrease in wheat production is expected in the next decades mainly due to the upcoming climate change. The identification of the processes which are triggered by heat stress and how thermotolerance develops in wheat is an active research topic. Genomic approach may help wheat breeding since it allows direct study on the genotype and relationship with the phenotype. Here the isolati...
#1S. P. HoadH-Index: 2
Last.David A. Laurie (JIC: John Innes Centre)H-Index: 37
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#1Amy Watson (UQ: University of Queensland)H-Index: 5
#2Sreya Ghosh (Norwich Research Park)H-Index: 5
Last.Andrew Steed (Norwich Research Park)H-Index: 8
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The growing human population and a changing environment have raised significant concern for global food security, with the current improvement rate of several important crops inadequate to meet future demand1. This slow improvement rate is attributed partly to the long generation times of crop plants. Here, we present a method called ‘speed breeding’, which greatly shortens generation time and accelerates breeding and research programmes. Speed breeding can be used to achieve up to 6 generations...
#1Jemima Brinton (Norwich Research Park)H-Index: 5
#2James Simmonds (Norwich Research Park)H-Index: 18
Last.Cristobal Uauy (Norwich Research Park)H-Index: 38
view all 6 authors...
Summary Crop yields must increase to address food insecurity. Grain weight, determined by grain length and width, is an important yield component, but our understanding of the underlying genes and mechanisms is limited. We used genetic mapping and near isogenic lines (NILs) to identify, validate and fine-map a major quantitative trait locus (QTL) on wheat chromosome 5A associated with grain weight. Detailed phenotypic characterisation of developing and mature grains from the NILs was performed. ...
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