Mr John Harper

Mr John Harper

PDRA - Forage Genetics & Plant Breeding

Contact Details

Publications

B chromosomes are associated with redistribution of genetic recombination towards lower-recombination chromosomal regions in perennial ryegrassHarper, J., Phillips, D., Thomas, A., Gasior, D., Evans, C., Powell, W., King, J., King, I., Jenkins, G. & Armstead, I. 2018 In : Journal of Experimental Botany.69, 8
Introgression of Aegilops speltoides segments in Triticum aestivum and the effect of the gametocidal genesKing, J., Grewal, S., Yang, C., Hubbart Edwards, S., Scholefield, D., Ashling, S., Harper, J., Allen, A., Edwards, K. J., Burridge, A. & King, I. P. 2018 In : Annals of Botany.121, 2, p. 229-24012 p.
Hydroponic evaluation of growth and nutrient uptake in a Lolium/Festuca introgression seriesHarper, J., Thomas, A., Evans, C., Mathews, R., Allen, D., Humphreys, M. & Armstead, I. 2017 p. 661 p.
An Increasing Need for Productive and Stress Resilient Festulolium Amphiploids: What Can Be Learnt from the Stable Genomic Composition of Festuca pratensis subsp. apennina (De Not.) Hegi?Kopecky, D., Harper, J., Bartoš, J., Gasior, D., Vrána, J., Hřibová, E., Boller, B., Ardenghi, N. M. G., Šimoníková, D., Doležel, J. & Humphreys, M. W. 2016 In : Frontiers in Environmental Science.4, 66
Climate-smart Strategies to Safeguard Persistency and Achieve Sustainable Grassland ProductionHumphreys, M., Loka, D., Gwynn-Jones, D., Scullion, J., Doonan, J., Gasior, D., Harper, J., Farrell, M., Kingston-Smith, A., Dodd, R., Chadwick, D., Hill, P., Mills, G., Hayes, F., Robinson, D. & Jones, D. 2016
Phylogenetic Relationships in the Festuca-Lolium Complex (Loliinae; Poaceae): New Insights from Chloroplast SequencesCheng, Y., Zhou, K., Humphreys, M. W., Harper, J. A., Zhang, X., Yan, H. & Huang, L. 2016 In : Frontiers in Ecology and the Environment.4, 89
Changes in freezing tolerance and photosystem II acclimation mechanisms within a Lolium perenne x Festuca pratensis substitution seriesGasior, D., Harper, J., Thomas, A., Evans, C., Armstead, I. & Humphreys, M. 2016 The multiple roles of grassland in the European bioeconomy: Proceedings of the 26th General Meeting of the European Grassland Federation. Höglind, M., Bakken, A. K., Hovstad, K. A., Kallioniemi, E., Riley, H., Steinshamnm, H. & Østrem, L. (eds.). Norway: Norwegian Institute of Bioeconomy Research, p. 835-837
An assessment of genetic diversity within a collection of natural Lolium perenne ecotypes from across EuropeGasior, D., Harper, J., Humphreys, M. & Armstead, I. 2015 31st International EUCARPIA Symposium Section Fodder Crops and Amenity Grasses: Breeding in a World of Scarcity. Ghent, Belgium
An Assessment of Phenotypic Diversity Within a Collection of Natural Lolium perenne Ecotypes and Cultivars from Across EuropeGasior, D., Harper, J., Humphreys, M., Lovatt, A., Armstead, I. & Sanderson, R. 2015 Proceedings of the 2015 Meeting of the Section “Forage Crops and Amenity Grasses” of Eucarpia: Breeding in a World of Scarcity. Roldán-Ruiz, I., Baert, J. & Reheul, D. (eds.). Switzerland: Springer Nature, p. 29-33
Exploitation of interspecific diversity for monocot crop improvementKing, J., Armstead, I. P., Harper, J. A., Ramsay, L., Snape, J., Waugh, R., James, C. L., Thomas, A. M., Gasior, D., Kelly, R. O., Roberts, L. A., Gustafson, P. & King, I. 2013 In : Heredity.110, p. 475–483
Transmission Frequencies of Introgressed Festuca pratensis Chromosome and Chromosome Segments in Lolium perenneArmstead, I. P., Harper, J. A., King, J. & King, I. 2013 In : Crop Science.53, 5, p. 1968-19736 p.
Alien introgression in the grasses Lolium perenne (perennial ryegrass) and Festuca pratensis (meadow fescue): the development of seven monosomic substitution lines and their molecular and cytological characterizationHarper, J., Armstead, I., Thomas, A., James, C., Gasior, D., Bisaga, M., Roberts, L., King, I. & King, J. 2011 In : Annals of Botany.107, 8, p. 1313-13219 p.
The production of a wide hybrid between Lolium multiflorum and the North African Festuca species festuca arundinacea subsp. atlantigenaHarper, J. A., Gasior, D., Humphreys, M. W., Farrell, M., King, J. & King, I. P. 2010
A study of the naturally occurring xFestulolium hybrid - xFestulolium loliaceum and its progenyHarper, J. A., Gasior, D., King, J., King, I. P., Thomas, I. D. & Humphreys, M. W. 2010
Manipulation of recombination in the grassesWilliams, G., King, I. P., King, J., Jenkins, G., Harper, J. & Armstead, I. P. 2009 Monogram Network Workshop.
Can the weed grass species Lolium temulentum be a useful tool in allowing us to investigate basic fundamental traits within the grasses?Harper, J. A., Gasior, D., Roberts, L. A., Thomas, A. M., James, C. L., King, J., King, I. P. & Armstead, I. P. 2009 p. p17
Progress in introgression mapping in the pooideaeKing, J., Armstead, I. P., Harper, J. A., James, C. L., Roberts, L. A., Gasior, D., Kelly, R. O., Huang, L. S., Thomas, A. M., Skot, K. & King, I. P. 2009 p. W274
Manipulation of recombination in the grassesWilliams, J. G., King, I. P., King, J., Jenkins, G., Harper, J. A. & Armstead, I. P. 2009 p. 131 p.
Comparative analysis reveal the major fraction of functionally annotated gene models in monocots are located in recombination poor/very poor regions of the genomeKing, J., Armstead, I. P., Donnison, I. S., Roberts, L. A., Harper, J. A., Skot, K. P., Elborough, K. & King, I. P. 2008 p. p34
Comparative analyses reveal the major fraction of functionally annotated gene models in monocots are located in recombination poor/very poor regions of the genomeKing, J., Armstead, I. P., Donnison, I., Roberts, L., Harper, J. A., Skøt, K., Elborough, K. & King, I. P. 2008
Festulolium loliaceum, an understudied natural UK grass hybrid species that may procide benefits to UK grasslands withstanding the onsets of climate changeHumphreys, M. W. & Harper, J. A. 2008 Crop Wild Relative, 6, p. 7-93 p.
Comparative Analyses Between Lolium/Festuca Introgression Lines and Rice Reveal the Major Fraction of Functionally Annotated Gene Models Is Located in Recombination-Poor/Very Recombination-Poor Regions of the GenomeArmstead, I. P., King, J., King, I. P., Harper, J. A., Roberts, L. A., Donnison, I. S. & Skøt, K. P. 2007 In : Genetics.177, 1, p. 597-60610 p.
Cross-species identification of Mendel's/locusArmstead, I. P., Donnison, I. S., Aubry, S., Harper, J. A., Hörtensteiner, S., James, C. L., Mani, J., Moffet, M., Ougham, H. J., Roberts, L. A., Thomas, A. M., Weeden, N., Thomas, S. & King, I. P. 2007 In : Science.315, 5808, p. 73
From crop to model to crop: identifying the genetic basis of the staygreen mutation in the Lolium/Festuca forage and amenity grassesArmstead, I. P., Donnison, I. S., Aubry, S., Harper, J. A., Hortensteiner, S., James, C. L., Mani, J., Moffet, M., Ougham, H. J., Roberts, L. A., Thomas, A. M., Weeden, N., Thomas, S. & King, I. P. 2006 In : New Phytologist.172, 4, p. 592-5976 p.
Introgression of crown rust (Puccinia coronata) resistance from meadow fescue (Festuca pratensis) into Italian ryegrass (Lolium multiflorum): Genetic mapping and identification of associated molecular markersArmstead, I. P., Harper, J. A., Turner, L. B., Skøt, L., King, I. P., Humphreys, M. O., Morgan, W. G., Thomas, H. M. & Roderick, H. W. 2006 In : Plant Pathology.55, 1, p. 62-676 p.
Molecular tagging of a senescence gene by introgression mapping of a stay-green mutation from Festuca pratensisThomas, A. M., Thomas, H., Armstead, I. P., King, I. P., Harper, J. A., Moore, B. J., Huang, L. S., Fentem, P. A., Ougham, H. J., Jones, R. N., Jones, T. A. H., Roberts, L. A., King, J. & Donnison, I. S. 2005 In : New Phytologist.165, 3, p. 801-8066 p.
Introgression-mapping of genes for drought resistance transferred from Festuca arundinacea var. glaucescens into Lolium multiflorumHumphreys, J., Harper, J. A., Armstead, I. P. & Humphreys, M. W. 2005 In : Theoretical and Applied Genetics.110, 3, p. 579-5879 p.
Introgression mapping in the grassesKing, I. P., King, J., Armstead, I. P., Harper, J. A., Roberts, L. A., Thomas, H., Ougham, H. J., Jones, R. N., Thomas, A. M., Moore, B. J. & Humphreys, M. O. (ed.) 2005 p. 31-4111 p.
Exploiting the Lolium/Festuca introgression systemKing, J., Armstead, I. P., Roberts, L. A., Harper, J. A., Donnison, I. S. & King, I. P. 2005
Physical mapping of rDNA sites in possible diploid progenitors of polyploid Festuca speciesHarper, J. A., Thomas, I. D., Lovatt, J. A. & Thomas, H. M. 2004 In : Plant Systematics and Evolution.245, 3-4, p. 3-42 p.
Identification of molecular markers for crown rust (Puccinia coronata) resistance in a Lolium/Festuca introgression population using syntenic relationships with riceArmstead, I., Roderick, H. W., Harper, J. A., Thomas, H. M., King, I. P. & Humphreys, M. O. 2004
Introgression of crown rust (Puccinia coronata) resistance from meadow fescue (Festuca pratensis) into Italian ryegrass (Lolium multiflorum) and physical mapping of the locusHarper, J. A., Morgan, W. G., Thomas, H. M. & Roderick, H. W. 2003 In : Heredity.p. 396-4005 p.
Improving forage protein through the use of Festulolium introgressionsGardner, R. K., Kingston-Smith, A. H., Harper, J. A. & Jenkins, G. M. 2003 p. 1-33 p.
Developing a chromosome substitution series in Lolium/FestucaHarper, J. A., Armstead, I., King, I. P., Roberts, L., Schledde, T., Wagner, N. & Thomas, H. 2002
Gross chromosome rearrangements are occurring in an accession of the grass Lolium rigidumThomas, H. M., Harper, J. A. & Morgan, W. G. 2001 In : Chromosome Research.p. 585-5906 p.
Introgression of chromosomes of Festuca arundinacea var. glaucescens into Lolium multiflorum revealed by genomic in situ hybridisation (GISH)Harper, J. A., Morgan, W. G., Thomas, H. M., Koch, S. & King, I. P. 2001 In : Theoretical and Applied Genetics.103, 5, p. 696-7016 p.
Genetic and physical analysis of a single Festuca pratensis chromosome segment substitution in Lolium perenneArmstead, I. P., King, I. P., Morgan, W. G., Forster, J. W., Jones, R. N., Bollard, A. L., Thomas, H. M., Hayward, M. D. & Harper, J. A. 2001 In : Chromosoma.110, 1, p. 52-576 p.
Species relationships, introgression and physical mapping in Lolium perenne x Festuca pratensis hybridsKing, I., Morgan, W. G., Armstead, I., Jones, T. A. H., Jones, R. N., Harper, J., Roberts, L., Taylor, S. & Thomas, H. 2000 Chromosomes Today: Proceedings 13th International Chromosome Conference. Olmo, E. & Redi, C. A. (eds.). Springer Nature, Vol. 13, p. 277-286
Introgression mapping in the grasses. I. Introgression of Festuca pratensis chromosomes and chromosome segments into Lolium perenneKing, I. P., Morgan, W. G., Armstead, I. P., Harper, J. A., Hayward, M. D., Bollard, A., Nash, J. V., Forster, J. W. & Thomas, H. M. 1998 In : Heredity.81, 4, p. 462-467
Comparison of ribosomal DNA sites inLolium species by fluorescencein situ hybridizationThomas, H. M., Harper, J. A., Meredith, M. R., Morgan, W. G., Thomas, I., Timms-Taravella, E. & King, I. 1996 In : Chromosome Research.4, 7, p. 486-4905 p.