James Simmonds
John Innes Centre
PopulationGeneticsBotanyQuantitative trait locusBiology
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Publications 43
#1Greg MellersH-Index: 1
#2Jorge González Aguilera (Empresa Brasileira de Pesquisa Agropecuária)H-Index: 3
Last. A. Steed (JIC: John Innes Centre)H-Index: 18
view all 16 authors...
Bread wheat (Triticum aestivum L.) is one of the world9s most important crops. Maintaining wheat yield gains across all of its major production areas is a key target towards underpinning global food security. Brazil is a major wheat producer in South America, generating grain yields of around 6.8 million tonnes per year. Here, we establish and genotype a wheat association mapping resource relevant to contemporary Brazilian wheat breeding programmes. The panel of 558 wheat accessions was genotype...
#1Andrzej Tkacz (University of Oxford)H-Index: 5
#2Francesco Pini (University of Oxford)H-Index: 12
Last. Cristobal Uauy (National Institute of Agricultural Botany)H-Index: 45
view all 11 authors...
The influence of wheat (modern wheat, both bread and pasta, their wild ancestors and synthetic hybrids) on the microbiota of their roots and surrounding soil is characterized. We isolated lines of bread wheat by hybridizing diploid (Aegilops tauschii) with tetraploid Triticum durum and crossed it with a modern cultivar of Triticum aestivum. The newly created, synthetic hybrid wheat, which recapitulate the breeding history of wheat through artificial selection, is found to support a microbiome en...
3 CitationsSource
#1Tansy ChiaH-Index: 2
#2Marcella ChiricoH-Index: 1
Last. Kay TraffordH-Index: 5
view all 11 authors...
In Triticeae endosperm (e.g. wheat and barley), starch granules have a bimodal size distribution (with A- and B-type granules) whereas in other grasses the endosperm contains starch granules with a unimodal size distribution. Here, we identify the gene, BGC1 (B-GRANULE CONTENT 1), responsible for B-type starch granule content in Aegilops and wheat. Orthologues of this gene are known to influence starch synthesis in diploids such as rice, Arabidopsis, and barley. However, using polyploid Triticea...
2 CitationsSource
#1Philippa Borrill (University of Birmingham)H-Index: 16
#2Sophie A. Harrington (Norwich Research Park)H-Index: 5
Last. Cristobal Uauy (Norwich Research Park)H-Index: 45
view all 4 authors...
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...
7 CitationsSource
#1Tansy ChiaH-Index: 2
#2Marcella ChiricoH-Index: 1
Last. Kay TraffordH-Index: 5
view all 11 authors...
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...
#1Sreya Ghosh (Norwich Research Park)H-Index: 7
#2Amy Watson (UQ: University of Queensland)H-Index: 6
Last. Lee T. Hickey (UQ: University of Queensland)H-Index: 16
view all 29 authors...
‘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...
14 CitationsSource
#1Alessia Comastri (University of Parma)H-Index: 2
#2Michela JanniH-Index: 13
Last. Nelson Marmiroli (University of Parma)H-Index: 34
view all 7 authors...
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...
3 CitationsSource
#1Steve HoadH-Index: 11
#2Simon Berry (Groupe Limagrain)H-Index: 9
Last. GW Wilson
view all 12 authors...
#1Wei Wang (KSU: Kansas State University)H-Index: 5
#2James Simmonds (JIC: John Innes Centre)H-Index: 21
Last. Eduard Akhunov (KSU: Kansas State University)H-Index: 42
view all 10 authors...
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.
13 CitationsSource
#1Jemima Brinton (JIC: John Innes Centre)H-Index: 4
#2James Simmonds (JIC: John Innes Centre)H-Index: 21
Last. Cristobal Uauy (JIC: John Innes Centre)H-Index: 45
view all 3 authors...
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...
7 CitationsSource