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A. J. Worland
John Innes Centre
31Publications
22H-index
3,213Citations
Publications 31
Newest
#1M.J. FoulkesH-Index: 17
#2N. D. PaveleyH-Index: 21
Last.J. W. SnapeH-Index: 50
view all 6 authors...
ABSTRACT Selection through plant breeding has resulted in most elite winter wheat germplasm in the United Kingdom containing the Rht-D1b semi-dwarfing allele, the 1BL.1RS chromosome arm translocation with rye, and an allele conferring suppression of awns. Near-isogenic lines (NILs) were used to test whether these major genetic changes have had any effect on disease tolerance. The ability of the NILs to tolerate epidemics of Septoria leaf blotch or stripe rust was measured in four field experimen...
#1María Rosa Simón (UNLP: National University of La Plata)H-Index: 17
#2A. J. Worland (JIC: John Innes Centre)H-Index: 22
Last.P.C. Struik (WUR: Wageningen University and Research Centre)H-Index: 38
view all 3 authors...
Chromosomal location of resistance to Mycosphaerella graminicola was studied in substitution lines of resistant Triticum genotypes into the (susceptible) cultivar Chinese Spring (T. aestivum ). (Moderately) resistant genotypes for which substitution lines were available were tested in a first screening. We selected a synthetic hexaploid wheat (Synthetic 6x; T. dicoccoides x T. tauschii ), T. spelta and the wheat (T. aestivum ) cultivars Cheyenne and Cappelle-Desprez. In a second screening the mo...
#1Vinesh Verma (JIC: John Innes Centre)H-Index: 1
#2M.J. Foulkes (University of Nottingham)H-Index: 17
Last.J. W. Snape (JIC: John Innes Centre)H-Index: 50
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The timing of flag leaf senescence (FLS) is an important determinant of yield under stress and optimal environments. A doubled haploid population derived from crossing the photo period-sensitive variety Beaver,with the photo period-insensitive variety Soissons, varied significantly for this trait, measured as the percent green flag leaf area remaining at 14 days and 35 days after anthesis. This trait also showed a significantly positive correlation with yield under variable environmental regimes...
#1M.J. FoulkesH-Index: 17
Last.J. W. SnapeH-Index: 50
view all 4 authors...
Using a pair of near-isogenic lines(NILs) of winter wheat (Triticumaestivum L.) contrasting for the Ppd-D1 and ppd-D1 alleles, in eachof Mercia and Cappelle-Desprez, experimentsin two seasons (1997/8 and 1998/9) on aloamy medium sand examined differences inflowering date, resource capture, biomassproduction and grain yield responses toirrigation. Drought did not occur for anysustained period in unirrigated conditionsin 1998 due to high seasonal rainfall. In1999, drought developed post-floweringu...
#1H. Muranty (INRA: Institut national de la recherche agronomique)H-Index: 3
#2J. Jahier (INRA: Institut national de la recherche agronomique)H-Index: 7
Last.C. N. Law (JIC: John Innes Centre)H-Index: 10
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Moderate resistance to eyespot was first incorporated in the variety Cappelle-Desprez (CD). Later the gene Pch1, which could confer a higher level of resistance, was introduced from Aegilops ventricosa. However Pch1-carrying varieties can sustain significant eyespot-induced yield losses in severe attack situations. A strategy to further enhance the resistance of wheat is by pyramiding Pch1 and the genes for resistance in CD. The first requirement to achieve this is a better understanding of the ...
#1S. R. ParkerH-Index: 1
#2N. D. PaveleyH-Index: 21
Last.A. J. WorlandH-Index: 1
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The cereals industry is subject to conflicting pressures, both from the public to reduce or eliminate pesticide use, and from the markets to minimise unit costs. The appropriate dose of fungicide (the dose required to minimise unit cost) would be reduced if wheat cultivars were better able to defend themselves against disease-induced loss. Three ‘self-defence’ mechanisms act in sequence to reduce loss: escape inhibits spore transfer to the upper canopy; resistance reduces the capacity of spores ...
#1Y. ZhouH-Index: 1
#2W. LiH-Index: 1
Last.A. J. Worland (JIC: John Innes Centre)H-Index: 22
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Heading time (HT, days from sowing to heading) is an important agronomic trait in rice. Physiologically, HT can be divided into two stages: vegetative growth time (VGT) and reproductive growth time (RGT). A number of studies for mapping QTLs conferring HT in rice have been reported, but none of them has tried to map HT-related QTLs based on their component traits (VGT and RGT). The present study aims to map HT-related QTLs in rice according not only to the performance of HT, but also the perform...
#1Ana María CastroH-Index: 10
#2S. RamosH-Index: 3
Last.E. Suárez (INTA: International Trademark Association)H-Index: 4
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Two sets of intervarietal chromosome substitution lines in the recipient,susceptible cultivar ‘Chinese Spring’ were screened to identify the wheat chromosomes involved with antixenosis, antibiosis and tolerance resistance to greenbug and Russian wheat aphid. The amphiploid ‘Synthetic’ and the cultivar ‘Hope’ were the donor parents. Antixenosis, antibiosis and tolerance were evaluated with conventional tests in controlled environmental conditions using a clone of greenbug biotype C and a clone of...
#1J. W. Snape (JIC: John Innes Centre)H-Index: 50
#2K. Butterworth (JIC: John Innes Centre)H-Index: 1
Last.A. J. Worland (JIC: John Innes Centre)H-Index: 22
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To maximise yield potential in any environment, wheat cultivars must have an appropriate flowering time and life cycle duration which ‘fine-tunes’ the life cycle to the target environment. This in turn, requires a detailed knowledge of the genetical control of the key components of the life cycle. This paper discusses our current knowledge of the genetical control of the three key groups of genes controlling life-cycle duration in wheat, namely those controlling vernalization response, photoperi...
#1María Rosa Simón (UNLP: National University of La Plata)H-Index: 17
#2A. J. Worland (JIC: John Innes Centre)H-Index: 22
Last.P.C. Struik (WUR: Wageningen University and Research Centre)H-Index: 38
view all 4 authors...
Chromosomal location of resistance to two virulent Argentinean isolatesof Septoria tritici was studied in two wheat (Triticum aestivumL.) cultivars (Cappelle-Desprez & Cheyenne), a synthetic hexaploid(Synthetic 6x) and Triticum spelta in seedlings. Substitution lines of these(resistant or moderately resistant) genotypes into (susceptible) ChineseSpring were selected from a previous screening. For Synthetic 6x,resistance was clearly located in chromosome 7D. Chinese Spring with the7D chromosome s...
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