Search Results - (Author, Cooperation:P. Langridge)

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  1. 1
    M. Pallotta ; T. Schnurbusch ; J. Hayes ; A. Hay ; U. Baumann ; J. Paull ; P. Langridge ; T. Sutton
    Nature Publishing Group (NPG)
    Published 2014
    Staff View
    Publication Date:
    2014-07-22
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Adaptation, Physiological/*drug effects/genetics ; Alleles ; Boron/*pharmacology ; Carrier Proteins/*genetics ; Drug Tolerance ; Gene Duplication/genetics ; Genes, Plant/*genetics ; Molecular Sequence Data ; Phylogeny ; Plant Proteins/genetics/metabolism ; Plant Roots/drug effects/genetics/metabolism ; Polyploidy ; Quantitative Trait Loci/genetics ; RNA, Messenger/analysis/genetics ; RNA, Plant/analysis/genetics ; Soil/*chemistry ; Triticum/classification/*drug effects/*genetics/physiology
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Staff View
    Publication Date:
    2012-10-19
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Alternative Splicing/genetics ; Codon, Nonsense/genetics ; Crops, Agricultural/genetics ; Evolution, Molecular ; Gene Expression Regulation, Plant ; Genes, Plant/genetics ; Genome, Plant/*genetics ; Genomics ; Hordeum/classification/*genetics ; Molecular Sequence Annotation ; Physical Chromosome Mapping ; Polymorphism, Single Nucleotide/genetics ; Repetitive Sequences, Nucleic Acid/genetics ; *Sequence Analysis, DNA ; Transcriptome/genetics
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  3. 3
    Staff View
    Publication Date:
    2013-07-05
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Acclimatization/genetics ; Agriculture/economics/*methods/*trends ; Biodiversity ; Biological Specimen Banks ; Breeding ; Crops, Agricultural/genetics ; Food Supply/*statistics & numerical data ; Genes, Plant ; Humans ; Phenotype ; Seeds/genetics
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  4. 4
    P. Langridge
    Nature Publishing Group (NPG)
    Published 2012
    Staff View
    Publication Date:
    2012-11-30
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    *Bread ; Genome, Plant/*genetics ; Triticum/*genetics
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  5. 5
    Jefferies, S. P. ; King, B. J. ; Barr, A. R. ; Warner, P. ; Logue, S. J. ; Langridge, P.

    Oxford, UK : Blackwell Publishing Ltd
    Published 2003
    Staff View
    ISSN:
    1439-0523
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes:
    YLM, a codaominant polymerase chain reaction (PCR) marker linked to Yd2, could substantially improve the precision and efficiency of barley yellow dwarf virus (BYDV) resistance breeding. The aim of this study was to assess the effectiveness of YLM in a marker-assisted introgression programme and to quantify associations between the presence of Yd2 and other agronomic and quality traits. The Yd2 gene was introgressed into a BYDV-susceptible background through two cycles of marker-assisted backcrossing. BC2 F2-derived lines, either carrying or not carrying the YLM allele associated with resistance, were compared in the presence and absence of BYDV. The YLM marker was shown to be effective in the introgression of Yd2. Lines carrying the YLM allele associated with resistance produced significantly fewer leaf symptoms and showed a reduction in yield loss when infected with BYDV. There were no deleterious effects associated with the introgression of Yd2 on grain yield, grain size or malting quality. The implications of marker-assisted selection for Yd2 on barley improvement are discussed.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1046/j.1439-0523.2003.00752.x

    Articles: DFG German National Licenses
  6. 6
    Staff View
    ISSN:
    1439-0523
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes:
    Cereal cyst nematode (CCN) (Heterodera avenae Woll.) is an economically damaging pest of barley in many of the worlds cereal growing areas. The development of CCN-resistant cultivars may be accelerated with the application of molecular markers. Three resistance genes against the pest have been mapped previously to chromosome 2 (Ha1, Ha2 and Ha3). In this study, a third gene present in the Australian barley variety ‘Galleon’ derived from the landrace ‘CI3576’ was located. Segregation analysis of CCN resistance data derived from doubled haploid populations of the cross ‘Haruna Nijo’בGalleon’ identified a single major locus controlling CCN resistance in the variety ‘Galleon’. This locus mapped to the long arm of chromosome 5H estimated to be 6.2 cM from the known function restriction fragment length polymorphism marker XYL (xylanase). While five genes for CCN resistance, including Ha2, have been mapped to group 2 chromosomes in the Triticeae, no gene other than Ha4 has been identified on group 5 chromosomes.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1111/j.1439-0523.1998.tb01477.x

    Articles: DFG German National Licenses
  7. 7
    Langridge, J. ; Langridge, P. ; Bergquist, P.L.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0003-2697
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Biology
    Chemistry and Pharmacology
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1016/0003-2697(80)90266-3

    Articles: DFG German National Licenses
  8. 8
    Langridge, P.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0014-5793
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Biology
    Chemistry and Pharmacology
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0014-5793(81)80025-7

    Articles: DFG German National Licenses
  9. 9
    Langridge, P. ; Pintor-Toro, J.A. ; Feix, G.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0006-291X
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Biology
    Chemistry and Pharmacology
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1016/S0006-291X(82)80130-7

    Articles: DFG German National Licenses
  10. 10
    Langridge, P. ; Pintor-Toro, J.A. ; Feix, G.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0006-291X
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Biology
    Chemistry and Pharmacology
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1016/S0006-291X(82)80130-7

    Articles: DFG German National Licenses
  11. 11
    Langridge, P. E. ; Firth, W. J.
    Springer
    Published 1992
    Staff View
    ISSN:
    1572-817X
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Electrical Engineering, Measurement and Control Technology
    Physics
    Notes:
    Abstract A numerical study of continuous-wave and pulse propagation in three-core fibre nonlinear directional couplers is presented. Intensity dependent demultiplexing is illustrated; in particular, novel nonlinear behaviour where a very small change in peak input intensity alters the core from which a pulse emerges.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00624675

    Articles: DFG German National Licenses
  12. 12
    Staff View
    ISSN:
    1432-0614
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Process Engineering, Biotechnology, Nutrition Technology
    Notes:
    Summary Polypeptides, with elevated levels of essential amino acids, could be useful as partial protein supplements to food and feeds. To obtain DNA fragments coding for these polymers, oligonucleotides were constructed by random synthesis of a mixture of appropriate codon pairs and inserted into a bacterial plasmid in E. coli. Two of the isolated fragments were subjected to DNA sequence analysis and theoretically code for polypeptides containing up to 23% lysine, 12% tryptophan, 12% methionine, 6% isoleucine, and 6% threonine. These five amino acids make up 60% of the total amino acid content of the peptide, compared with 25% for the same amino acids in α lactalbumin, a milk protein considered to be high in essential amino acids. These fragments, when fused to an active bacterial promoter, which directs the synthesis of chloramphenicol acetyl transferase (CAT), cause bacteria, harboring these modified genes, to take up more lysine as compared to control cells and produce commensurately larger CAT polypeptides. This method of gene synthesis may permit production of polypeptides with a specified amino acid composition to supplement specific diets low in the essential amino acids.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00295122

    Articles: DFG German National Licenses
  13. 13
    Hamilton, D. ; Langridge, P.
    Springer
    Published 1976
    Staff View
    ISSN:
    1420-9071
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Medicine
    Notes:
    Summary It is shown by light microscopy and microspectrophotometry that severalPopulus species produce trinucleate pollen. Such pollen seems more widespread than previously acknowledged.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF01920800

    Articles: DFG German National Licenses
  14. 14
    Baumann, U. ; Langridge, P.
    Springer
    Published 1997
    Staff View
    ISSN:
    1432-2145
    Keywords:
    Key words Phalaris coerulescens ; Pollen-specific ; Zm13
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/s004970050078

    Articles: DFG German National Licenses
  15. 15
    Staff View
    ISSN:
    1432-2242
    Keywords:
    Key words Barley ; Manganese efficiency ; RFLP mapping ; Marker-assisted Selection ; Plant nutrition ; 4HS
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Notes:
    Abstract  In many cropping regions of the world, yield is limited by the availability of micronutrients, and micronutrient-efficient cultivars provide a yield advantage. Traditional methods of testing cultivars for micronutrient efficiency are time-consuming and laborious. Molecular markers linked to loci controlling micronutrient efficiency will allow more rapid and efficient selection and introgression of these traits than is currently possible. Using a pot-based bioassay and bulked segregant analysis of an F2 population, we have identified several RFLPs (grouped distally on chromosome 4HS) linked to a locus for manganese efficiency in barley. This manganese efficiency locus has been designated Mel1. Pot bioassay analysis of intercrosses suggests that three useful sources of manganese efficiency are likely to be allelic at the Mel1 locus. Field evaluation of marker selected F4 progeny supports the major role of Mel1 in the genetic control of manganese efficiency. Adoption of marker assisted selection for this trait in the Southern Australian barley breeding program has occurred. This has been facilitated by the demonstration that the Mel1 allele of Amagi Nijo can be distinguished from 95 other locally useful varieties and breeder’s lines on the basis of RFLPs identified by just two molecular markers.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/s001220051585

    Articles: DFG German National Licenses
  16. 16
    Staff View
    ISSN:
    1432-2242
    Keywords:
    Key words Boron toxicity ; Boron tolerance ; Mapping ; Wheat ; Marker-assisted selection
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Notes:
    Abstract  Boron is an essential plant micro-nutrient which can be phytotoxic to plants if present in soils in high concentration. Boron toxicity has been recognised as an important problem limiting production in the low rainfall areas of southern Australia, West Asia and North Africa. Genetic variation for boron toxicity tolerance in wheat has been well-characterised. The efficiency of breeding for boron toxicity tolerance could be greatly enhanced by the development of molecular markers associated with QTLs for tolerance in wheat. A population of 161 doubled haploids from a cross between the tolerant cultivar Halberd and the moderately sensitive cultivar Cranbrook was used to identify chromosomal regions involved in boron tolerance. A combined RFLP and AFLP linkage map of the Cranbrook x Halberd population was used to identify chromosomal regions involved in the boron tolerance traits measured. Regions on chromosome 7B and 7D were associated with leaf symptom expression. The region on chromosome 7B was also associated with the control of boron uptake and with a reduction in the effect of boron toxicity on root-growth suppression. RFLP markers at the chromosome 7B and 7D loci were shown to be effective in selecting for improved boron tolerance in an alternative genetic background. Halberd alleles at the chromosome 7B locus were associated with the concentration of boron in whole shoots and grain. The concentration of boron in whole shoots and in grain were both related to grain yield in a field trial conducted on soil containing toxic levels of boron. Implications relating to marker-assisted selection for boron toxicity tolerance in wheat are discussed.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/s001220051542

    Articles: DFG German National Licenses
  17. 17
    Langridge, P. ; Moran, G. F. ; Brown, A. H. D.
    Springer
    Published 1981
    Staff View
    ISSN:
    1573-4927
    Keywords:
    seed proteins ; Pinus radiata ; size polymorphism
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Chemistry and Pharmacology
    Notes:
    Abstract In a high-salt soluble fraction of the total protein from single seeds of Pinus radiata, up to 45 polypeptides were resolved on SDS-polyacrylamide gels. At least one-fifth of these polypeptides showed variation between seeds. In the 27,000–29,000 dalton region, two polypeptides were inherited as codominant alleles at a single locus and were shown to assort independently of another seed protein locus and three allozyme loci. A survey of 120 individuals from the five known native populations of P. radiata in California detected only the 27K and 29K alleles at the locus. In all populations, the 29K allele predominated, and the two island populations were monomorphic for the 29K allele. The 27 and 29 kdalton polypeptides were shown to have very similar amino acid sequences, and the allelic difference at this locus is most probably in the gene sequence for the polypeptide.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00484628

    Articles: DFG German National Licenses
  18. 18
    Staff View
    ISSN:
    1432-2242
    Keywords:
    Wheat-rye recombinants ; Homoeologous recombination ; Repetitive DNA sequences ; RFLP markers ; mapping
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Notes:
    Summary The introgression of genetic material from alien species is assuming increased importance in wheat breeding programs. One example is the translocation of the short arm of rye chromosome 1 (1RS) onto homoeologous wheat chromosomes, which confers disease resistance and increased yield on wheat. However, this translocation is also associated with dough quality defects. To break the linkage between the desirable agronomic traits and poor dough quality, recombination has been induced between 1RS and the homoeologous wheat arm IDS. Seven new recombinants were isolated, with five being similar to those reported earlier and two havina new type of structure. All available recombinantsw ere characterized with DNA probes for the loci Nor-R1, 5SDna-R1, and Tel-R1. Also, the amount of rye chromatin present was quantified with a dispersed rye-specific repetitive DNA sequence in quantitative dot blots. Furthermore, the wheat-rye recombinants were used as a mapping tool to assign two RFLP markers to specific regions on chromosome arms 1DS and 1RS of wheat and rye, respectively.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00226788

    Articles: DFG German National Licenses
  19. 19
    Staff View
    ISSN:
    1432-2242
    Keywords:
    Alien introgression ; Wheat-rye recombinants ; Homoeologous recombination ; RFLP markers
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Notes:
    Summary The introgression of genetic material from alien species into wheat has become an important tool in modern wheat breeding. Ideally, only the trait of interest and no flanking material should be transferred. Random recombination between the genetic material is therefore of paramount importance. In a model system, we examined 17 recombinants putatively between chromosome 1D of wheat and 1R of rye with 60 random RFLP and three PCR markers. The recombinants had been generated by removing the normal effect of the Ph1 gene in the wheat background. Amongst the nine short-arm recombinants, three breakpoints were identified but no differentiation could be made between the five proximal recombinants. For the eight long-arm recombinants analysed only two breakpoints were identified with 36 markers. However, only a single RFLP marker was able to differentiate between the recombinants. Indeed the long-arm results are consistent with the possibility that only the rye telomeric region had been transferred. These results indicate either a strong clustering of the RFLP markers near the centromere or else imply that recombination induced between wheat and rye in the absence of the normal effect of the Ph1 gene occurs at only restricted sites. The results allow new primary recombinants to be selected for intercrossing to generate secondary recombinants which are expected to have a smaller interstitial rye segment than that present in DR-A1.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00215043

    Articles: DFG German National Licenses
  20. 20
    Staff View
    ISSN:
    1432-2242
    Keywords:
    Barley DNA ; (1→3)-β-Glucanase ; Linkage map ; Pathogenesis-related proteins ; Gene family
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Notes:
    Abstract Members of the (1→3)-β-glucan glucanohydrolase (EC 3.2.1.39) gene family have been mapped on the barley genome using three doubled haploid populations and seven wheat-barley addition lines. Specific probes or polymerase chain reaction (PCR) primers were generated for the seven barley (1→3)-β-glucanase genes for which cDNA or genomic clones are currently available. The seven genes are all located on the long arm of chromosome 3 (3HL), and genes encoding isoenzymes GI, GII, GIII, GIV, GV and GVII (ABG2) are clustered in a region less than 20 cM in length. The region is flanked by the RFLP marker MWG2099 on the proximal side and the Barley Yellow Mosaic Virus (BYMV) resistance gene ym4 at the distal end. The gene encoding isoenzyme GVI lies approximately 50 cM outside this cluster, towards the centromere. With the exception of the gene encoding isoenzyme GIV, all of the (1→3)-β-glucanase genes are represented by single copies on the barley genome. The probe for the isoenzyme GIV gene hybridized with four DNA bands during Southern blot analysis, only one of which could be incorporated into the consensus linkage map.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00221889

    Articles: DFG German National Licenses