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M. John Foulkes
University of Nottingham
23Publications
16H-index
1,357Citations
Publications 24
Newest
#1Carolina Rivera-Amado (CIMMYT: International Maize and Wheat Improvement Center)
#2Eliseo Trujillo-Negrellos (University of Nottingham)
Last.M. John Foulkes (University of Nottingham)H-Index: 16
view all 6 authors...
Abstract Improving biomass is an important goal for future genetic gains in yield potential in wheat, but it will also be crucial to identify physiological traits to maximize harvest index (HI, proportion of aboveground biomass in grain). Increased grain partitioning will require increased dry-matter (DM) partitioning to the spikes at anthesis as well as enhanced fruiting efficiency (FE, grains per g spike dry matter at anthesis or chaff dry matter at harvest), whilst optimizing the partitioning...
Source
#1Larry M. YorkH-Index: 8
#2Shaunagh Slack (University of Nottingham)H-Index: 2
Last.M. John Foulkes (University of Nottingham)H-Index: 16
view all 4 authors...
Wheat represents a major crop, yet the current rate of yield improvement is insufficient to meet its projected global food demand. Breeding root systems more efficient for water and nitrogen capture represents a promising avenue for accelerating yield gains. Root crown phenotyping, or shovelomics, relies on excavation of the upper portions of root systems in the field and measuring root properties such as numbers, angles, densities and lengths. We report a new shovelomics method that images the ...
6 CitationsSource
#1Kim Kenobi (Aberystwyth University)H-Index: 11
#2Jonathan A. Atkinson (University of Nottingham)H-Index: 8
Last.Malcolm J. Bennett (University of Nottingham)H-Index: 81
view all 9 authors...
Root architecture impacts water and nutrient uptake efficiency. Identifying exactly which root architectural properties influence these agronomic traits can prove challenging. In this paper approximately 300 wheat plants were divided into four groups using two binary classifications, high vs. low nitrogen uptake efficiency (NUpE), and high vs. low nitrate in medium. The root system architecture for each wheat plant was captured using 16 quantitative variables. The multivariate analysis tool, lin...
4 CitationsSource
#1Oorbessy Gaju (University of Nottingham)H-Index: 13
#2Jayalath DeSilva (University of Nottingham)H-Index: 1
Last.M. John Foulkes (University of Nottingham)H-Index: 16
view all 7 authors...
Abstract Future genetic progress in wheat grain yield will depend on increasing above-ground biomass and this must be achieved without commensurate increases in N fertilizer inputs to minimise environmental impacts. Our objective was to quantify variation in grain yield, above-ground biomass and N-use efficiency (NUE) and associated traits in a panel of diverse hexaploid wheat germplasm comprising: (i) landraces from the AE Watkins collection, (ii) synthetic-derived hexaploid lines in a cv. Para...
24 CitationsSource
#1Jonathan A. Atkinson (University of Nottingham)H-Index: 8
#2Luzie U. Wingen (Norwich Research Park)H-Index: 19
Last.Darren M. Wells (University of Nottingham)H-Index: 25
view all 11 authors...
Seedling root traits of wheat (Triticum aestivum L.) have been shown to be important for efficient establishment and linked to mature plant traits such as height and yield. A root phenotyping pipeline, consisting of a germination paper-based screen combined with image segmentation and analysis software, was developed and used to characterize seedling traits in 94 doubled haploid progeny derived from a cross between the winter wheat cultivars Rialto and Savannah. Field experiments were conducted ...
72 CitationsSource
#1Oorbessy Gaju (University of Nottingham)H-Index: 13
#2Matthew P. Reynolds (CIMMYT: International Maize and Wheat Improvement Center)H-Index: 60
Last.M. John Foulkes (University of Nottingham)H-Index: 16
view all 7 authors...
Our objective was to investigate the relationships between spike traits, grain number and yield potential and their physiological basis in a doubled-haploid (DH) population derived from a cross between a CIMMYT spring wheat (Triticum aestivum L.) advanced line of large-spike phenotype (LSP2; +Tin1 tiller inhibition gene) and the UK winter wheat cultivar Rialto (R; −Tin1) of conventional spike phenotype. Field experiments were carried out in high radiation, irrigated conditions in NW Mexico in tw...
14 CitationsSource
#1Pedro Carvalho (University of Nottingham)H-Index: 6
#2Sayed Azam-Ali (University of Nottingham Malaysia Campus)H-Index: 3
Last.M. John Foulkes (University of Nottingham)H-Index: 16
view all 3 authors...
In Mediterranean regions drought is the major factor limiting spring barley and durum wheat grain yields. This study aimed to compare spring barley and durum wheat root and shoot responses to drought and quantify relationships between root traits and water uptake under terminal drought. One spring barley (Hordeum vulgare L. cv. Rum) and two durum wheat Mediterranean cultivars (Triticum turgidum L. var durum cvs Hourani and Karim) were examined in soil-column experiments under well watered and dr...
20 CitationsSource
#1Oorbessy Gaju (University of Nottingham)H-Index: 13
#2Vincent Allard (Blaise Pascal University)H-Index: 24
Last.M. John Foulkes (University of Nottingham)H-Index: 16
view all 8 authors...
Abstract Our objective was to investigate the determinants of genetic variation in N accumulation, N partitioning and N remobilization to the grain post-flowering and associations with flag-leaf senescence, grain yield and grain N% in 16 wheat cultivars grown under high N (HN) and low N (LN) conditions in the UK and France. Overall, cultivars ranged in leaf lamina N accumulation at anthesis from 5.32 to 8.03 g N m −2 at HN and from 2.69 to 3.62 g N m −2 at LN, and for the stem-and leaf-sheath fr...
75 CitationsSource
#1Delphine Moreau (INRA: Institut national de la recherche agronomique)H-Index: 13
#2Vincent Allard (INRA: Institut national de la recherche agronomique)H-Index: 24
Last.Pierre Martre (INRA: Institut national de la recherche agronomique)H-Index: 36
view all 6 authors...
Vertical leaf nitrogen (N) gradient within a canopy is classically considered as a key adaptation to the local light environment that would tend to maximize canopy photosynthesis. We studied the vertical leaf N gradient with respect to the light gradient for wheat (Triticum aestivum) canopies with the aims of quantifying its modulation by crop N status and genetic variability and analyzing its ecophysiological determinants. The vertical distribution of leaf N and light was analyzed at anthesis f...
22 CitationsSource
#1Jianqiang He (Blaise Pascal University)H-Index: 11
#2Jacques Le Gouis (Blaise Pascal University)H-Index: 27
Last.Pierre Martre (Blaise Pascal University)H-Index: 36
view all 12 authors...
The rate of organ emergence and the duration of developmental phases are key components of plant fitness to its environment. Here, we describe a hybrid genetic algorithm for the estimation of the parameters of complex non-linear simulation models that we used to estimate the varietal parameters of a well-evaluated ecophysiological model (Sirius) of wheat phenology. The aim of this study was to analyze the correlations between the varietal parameters of Sirius and to determine the minimum number ...
38 CitationsSource
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