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Browsing IBERS Research papers by Author "Armstead, Ian P."

Now showing items 1-20 of 45

Alignment of the genomes of brachypodium distachyon and temperate cereals and grasses using bacterial artificial chromosome landing with fluorescence in situ hybridization

Donnison, Iain S.; King, Ian P.; Wolny, Elzbieta; Jenkins, Glyn M.; Marasek, Agnieszka; Armstead, Ian P.; Hasterok, Robert; Idziak, Dominika; Draper, John H.; Thomas, Ann M. (2006-05-01)

As part of an initiative to develop Brachypodium distachyon as a genomic 'bridge' species between rice and the temperate cereals and grasses, a BAC library has been constructed for the two diploid (2n = 2x = 10) genotypes, ...
The application of genecology to the discovery of associations between phenotype and molecular markers in natural populations of perennial ryegrass

Thomas, Ian D.; Skøt, Leif; Sanderson, Ruth; Chorlton, Ken H.; Armstead, Ian P.; Humphreys, Mervyn O.; Heywood, Susan; Sackville Hamilton, N. Ruaraidh (2004)
Approaches for associating molecular polymorphisms with phenotypic traits based on linkage disequilibrium in natural populations of Lolium perenne

Humphreys, Janet; Skøt, Leif; Humphreys, Mervyn O.; Thomas, Ian D.; Gallagher, Joe; Armstead, Ian P. (Wageningen Academic Publishers, 2001)

Grassland covers 26% of the world's total land area. It produces feed for livestock; maintains soil fertility; protects and conserves soil and water resources; creates a habitat for wildlife; provides recreational space ...
An association mapping approach to identify flowering time genes in natural populations of Lolium perenne (L.)

Skøt, Leif; Humphreys, Mervyn O.; Armstead, Ian P.; Heywood, Susan; Skøt, Kirsten P.; Sanderson, Ruth; Thomas, Ian D.; Chorlton, Ken H.; Sackville Hamilton, N. Ruaraidh (2005-05-04)

We describe an association mapping approach using natural populations of perennial ryegrass (Lolium perenne L.) to identify molecular markers associated with heading date, an important trait affecting seasonal production, ...
Association mapping of molecular markers for flowering time using natural populations of Lolium perenne

Skøt, Leif; Armstead, Ian P.; Chorlton, Ken H.; Mizen, Sue; Dhanoa, M. S.; Thomas, Ian D.; Sackville Hamilton, N. Ruaraidh; Humphreys, Mervyn O. (2003)
Association of candidate genes with flowering time and water-soluble carbohydrate content in Lolium perenne (L.)

Skøt, Leif; Humphreys, Janet; Humphreys, Mervyn O.; Thorogood, Daniel; Gallagher, Joseph Anthony; Sanderson, Ruth; Armstead, Ian P.; Thomas, Ian D. (2007-09-01)

We describe a candidate gene approach for associating SNPs with variation in flowering time and water-soluble carbohydrate (WSC) content and other quality traits in the temperate forage grass species Lolium perenne. Three ...
Bioinformatics in the orphan crops

Armstead, Ian P.; Huang, Lin S.; Ravagnani, Adriana; Robson, Paul R.; Ougham, Helen J. (2009-09-04)

Orphan crops are those which are grown as food, animal feed or other crops of some importance in agriculture, but which have not yet received the investment of research effort or funding required to develop significant ...
Changes in SSR allele frequencies during phenotypic selection for water-soluble carbohydrate (WSC) in an experimental population of perennial ryegrass

Armstead, Ian P.; Turner, Lesley B.; Humphreys, Mervyn O.; Farrell, Markku S.; Cairns, Andrew J.; Skøt, Kirsten P.; Farrar, Kerrie; Donnison, Iain S. (2008)
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 Genome

Armstead, Ian P.; King, Julie; King, Ian P.; Harper, John A.; Roberts, Luned A.; Donnison, Iain S.; Skøt, Kirsten P. (2007-07-01)

Publication of the rice genome sequence has allowed an in-depth analysis of genome organization in a model monocot plant species. This has provided a powerful tool for genome analysis in large-genome unsequenced agriculturally ...
Comparative analyses reveal the major fraction of functionally annotated gene models in monocots are located in recombination poor/very poor regions of the genome

King, Julie; Armstead, Ian P.; Donnison, Iain; Roberts, Luned; Harper, John A.; Skøt, Kirsten; Elborough, Kieran; King, Ian P. (2008-08-21)

Sequencing of the rice genome has allowed an in depth analysis of genome organization in a model monocot plant species. This has provided a powerful tool for genome analysis in large genome un-sequenced agriculturally ...
Comparison and integration of genetic maps generated from F2 and BC1-type mapping populations in perennial ryegrass (Lolium perenne L.)

Armstead, Ian P.; Humphreys, Mervyn O.; Cairns, Andrew J.; King, Ian P.; Turner, Lesley B. (2002-12)

Linkage maps of perennial ryegrass were constructed from F2 and BC1-type populations using, predominantly, restriction fragment length polymorphism data based on heterologous probes used in mapping other grass species. The ...
Cross-species identification of Mendel's/locus

Armstead, Ian P.; Donnison, Iain S.; Aubry, Sylvain; Harper, John A.; Hörtensteiner, Stefan; James, Caron L.; Mani, Jan; Moffet, Matt; Ougham, Helen Joan; Roberts, Luned Ann; Thomas, Ann Myfanwy; Weeden, Norman; Thomas, Sid; King, Ian Philip (2007-01-05)

A key gene involved in plant senescence, mutations of which partially disable chlorophyll catabolism and confer stay-green leaf and cotyledon phenotypes, has been identified in Pisum sativum, Arabidopsis thaliana, and ...
Development of a breeders' toolkit for drought resistance in a Lolium/Festuca hybrid

Humphreys, Janet; Armstead, Ian P.; Humphreys, Michael W. (2005)

This book contains a compilation of offered papers presented at the main congress of the XX International Grassland Congress held in University College Dublin, Ireland from 26 June to 1 July, 2005. It is complemented by ...
Development of a genomic microsatellite library in perennial ryegrass (Lolium perenne) and its use in trait mapping

King, Julie; Thorogood, Daniel; Edwards, Keith J.; Armstead, Ian P.; Roberts, Luned A.; Skøt, Kirsten P.; Hanley, Z.; King, Ian P. (2008-04-01)

Background and Aims: Perennial ryegrass (Lolium perenne) is one of the key forage and amenity grasses throughout the world. In the UK it accounts for 70 % of all agricultural land use with an estimated farm gate value of ...
Dissecting the regulation of fructan metabolism in perennial ryegrass (Lolium perenne) with quantitative trait locus mapping

Turner, Lesley B.; Cairns, Andrew J.; Armstead, Ian P.; Ashton, Jenny; Skøt, Kirsten P.; Whittaker, D.; Humphreys, Mervyn O. (2006-01-01)

Quantitative trait locus (QTL) mapping, which can be a useful tool for dissecting complex traits, has been used here to study the regulation of fructan metabolism in temperate forage grasses. • An F2 mapping family, derived ...
An enhanced molecular marker based genetic map of perennial ryegrass (Lolium perenne) reveals comparative relationships with other Poaceae genomes

Jones, Elizabeth S.; Mahoney, Natalia L.; Hayward, Mike Denis; Armstead, Ian P.; Jones, J. Gilbert; Humphreys, Mervyn O.; King, Ian P.; Kishida, Tsugutoshi; Yamada, Toshihiko; Balfourier, François; Charmet, Gilles; Forster, John W. (2002)

A molecular-marker linkage map has been constructed for perennial ryegrass (Lolium perenne L.) using a one-way pseudo-testcross population based on the mating of a multiple heterozygous individual with a doubled haploid ...
EST-derived SSR markers used as anchor loci for the construction of a consensus linkage map in ryegrass (Lolium spp.)

Studer, Bruno; Kölliker, Roland; Muylle, Hilde; Asp, Torben; Frei, Ursula C.; Roldán-Ruiz, Isabel; Barre, Philippe; Tomaszewski, Celine; Meally, Helena; Barth, Susanne; Skøt, Leif; Armstead, Ian P.; Dolstra, Oene; Lübberstedt, Thomas (2010-08-16)

Background Genetic markers and linkage mapping are basic prerequisites for marker-assisted selection and map-based cloning. In the case of the key grassland species Lolium spp., numerous mapping populations have been ...
The floral transition in model and forage grasses

Donnison, Iain S.; Cisneros, Pedro; Montoya, Teresa; Armstead, Ian P.; Thomas, Barry John; Jones, R. Neil; Morris, Phillip (2002-05)

We have been using the classical model long-day (LD) plant Lolium temulentum Ceres, which can flower after a single inductive LD treatment, to study the floral transition in grasses. Plants of L. temulentum have been grown ...
From crop to model to crop: identifying the genetic basis of the staygreen mutation in the Lolium/Festuca forage and amenity grasses

Armstead, Ian P.; Donnison, Iain S.; Aubry, Sylvain; Harper, John A.; Hortensteiner, Stefan; James, Caron L.; Mani, Jan; Moffet, Matt; Ougham, Helen J.; Roberts, Luned A.; Thomas, Ann Myfanwy; Weeden, Norman; Thomas, Sid; King, Ian Philip (2006-12)
Genetic and physical analysis of a single Festuca pratensis chromosome segment substitution in Lolium perenne

Armstead, Ian P.; King, Ian P.; Morgan, W. G.; Forster, John W.; Jones, R. Neil; Bollard, Andrea L.; Thomas, Huw M.; Hayward, Mike Denis; Harper, John A. (2001-02-20)

Molecular marker analysis and genomic in situ hybridisation (GISH) were used to examine the process of chromosome segment introgression in BC2 diploid hybrids (2n=2x=14) between Lolium perenne and Festuca pratensis. Two ...

Now showing items 1-20 of 45

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