Search Results - (Author, Cooperation:R. J. Snowdon)
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1Latest Papers from Table of Contents or Articles in PressB. Chalhoub ; F. Denoeud ; S. Liu ; I. A. Parkin ; H. Tang ; X. Wang ; J. Chiquet ; H. Belcram ; C. Tong ; B. Samans ; M. Correa ; C. Da Silva ; J. Just ; C. Falentin ; C. S. Koh ; I. Le Clainche ; M. Bernard ; P. Bento ; B. Noel ; K. Labadie ; A. Alberti ; M. Charles ; D. Arnaud ; H. Guo ; C. Daviaud ; S. Alamery ; K. Jabbari ; M. Zhao ; P. P. Edger ; H. Chelaifa ; D. Tack ; G. Lassalle ; I. Mestiri ; N. Schnel ; M. C. Le Paslier ; G. Fan ; V. Renault ; P. E. Bayer ; A. A. Golicz ; S. Manoli ; T. H. Lee ; V. H. Thi ; S. Chalabi ; Q. Hu ; C. Fan ; R. Tollenaere ; Y. Lu ; C. Battail ; J. Shen ; C. H. Sidebottom ; A. Canaguier ; A. Chauveau ; A. Berard ; G. Deniot ; M. Guan ; Z. Liu ; F. Sun ; Y. P. Lim ; E. Lyons ; C. D. Town ; I. Bancroft ; J. Meng ; J. Ma ; J. C. Pires ; G. J. King ; D. Brunel ; R. Delourme ; M. Renard ; J. M. Aury ; K. L. Adams ; J. Batley ; R. J. Snowdon ; J. Tost ; D. Edwards ; Y. Zhou ; W. Hua ; A. G. Sharpe ; A. H. Paterson ; C. Guan ; P. Wincker
American Association for the Advancement of Science (AAAS)
Published 2014Staff ViewPublication Date: 2014-08-26Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Brassica napus/cytology/*genetics ; *Chromosome Duplication ; *Evolution, Molecular ; *Genome, Plant ; *Polyploidy ; Seeds/*geneticsPublished by: -
2Articles: DFG German National LicensesSeyis, F. ; Snowdon, R. J. ; Luhs, W. ; Friedt, W.
Oxford, UK : Blackwell Publishing Ltd
Published 2003Staff ViewISSN: 1439-0523Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionNotes: Resynthesized (RS) rapeseed generated from interspecific hybridization between suitable forms of Brassica rapa L. (syn. campestris; genome AA, 2n = 20) and B. oleracea L. (CC, 2n = 18) represents a potentially important resource to expand genetic diversity in the narrow gene pool of oilseed rape (B. napus L., AACC, 2n = 38). In this study 165 RS rapeseed lines originating from crosses between an Indian Yellow Sarson (B. rapa ssp. trilocularis) and five different cauliflower (B. oleracea convar. botrytis) cultivars were studied using amplified fragment length polymorphism (AFLP) markers and their genetic diversity was compared in relationship to an assortment of 40 diverse spring oilseed and fodder rape varieties. Using three AFLP primer combinations, a total of 467 polymorphic bands were scored. Cluster analysis allowed differentiation among the different RS lines, which, as expected, were genetically highly divergent from the cultivars. The genetic diversity of the material is discussed in relation to its morphological variability with a view to the implementation of RS lines in oilseed rape breeding.Type of Medium: Electronic ResourceURL: -
3Articles: DFG German National LicensesStaff View
ISSN: 1439-0523Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionNotes: As PCR techniques have developed over the last 15 years, a wealth of new DNA marker technologies have arisen which have enabled the generation of high-density molecular maps for all the major Brassica crop species. Molecular markers have also been heavily used in analyses of genetic diversity in Brassica crops. The majority of the work utilizing molecular markers in Brassica oilseed breeding has to date been based on genetic mapping using various DNA marker systems in segregating populations generated for specific investigations of particular traits of interest. For numerous qualitative traits, traditional mapping approaches have led to the development of marker-assisted selection strategies in oilseed Brassica breeding, and in some cases to map-based cloning of the responsible genes. For quantitative traits, however, it has become apparent that traditional mapping of quantitative trait loci (QTL) is often not sufficient to develop effective markers for trait introgression or for identification of the genes responsible. In this case, allele-trait association studies in non-structured genetic populations represent an interesting new approach, provided the degree of gametic phase disequilibrium between the QTL and the marker loci is sufficient. Because Brassica species represent the closest crop plant relatives to the model plant Arabidopsis thaliana, significant progress will be achieved in the coming years through integration of candidate gene approaches in crop brassicas, using the detailed information now available for the Arabidopsis genome. Integration of information from the model plant with the increasing supply of data from physical mapping and sequencing of the diploid Brassica genomes will undoubtedly give great insight into the genetics underlying both simple and complex traits in oilseed rape. This review describes the current use of available genetic marker technologies in oilseed rape breeding and provides an outlook for use of new technologies, including single-nucleotide polymorphism markers, candidate gene approaches and allele-trait association studies.Type of Medium: Electronic ResourceURL: -
4Articles: DFG German National LicensesJaag, T. ; Langsdorf, A. ; Snowdon, R. J. ; Köhler, W. ; Hartmann, H. D.
Oxford, UK : Blackwell Publishing Ltd
Published 1998Staff ViewISSN: 1439-0523Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionNotes: DNA polymorphism among nine cultivars of Asparagus officinalis L. was measured using random amplified polymorphic DNA (RAPD). Of 69 reproducible amplification products from 12 arbitrary decamer primers, 49 RAPD markers were polymorphic and could be used to distinguish six German and three Dutch asparagus cultivars. Even with very small sample sizes, genetic similarity measurements based on the RAPD data allowed accurate grouping of the nine cultivars into distinct clusters, with the exception of two individuals which clustered to closely related varieties. Two German cultivars showed high genetic similarity and were distinct from the remaining German varieties. The German and Dutch cultivars were clearly separated by a relatively large genetic distance.Type of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesStaff View
ISSN: 1432-2242Keywords: Key words Brassica napus ; Sinapis arvensis ; Leptosphaeria maculans ; Intergeneric hybrids ; Blackleg resistance ; Genomic in situ hybridisationSource: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: Abstract Blackleg caused by Leptosphaeria maculans is one of the most important diseases affecting oilseed rape worldwide. Sinapis arvensis is valuable for the transfer of blackleg resistance to oilseed rape (Brassica napus) because this species contains high resistance against various aggressive isolates of the blackleg fungus. These include at least one Australian isolate which has been found to overcome resistance originating from species with the Brassica B genome, until now the major source for interspecific transfer of blackleg resistance. Backcross offspring from intergeneric crosses between Brassica napus and S. arvensis were subjected to phytopathological studies and molecular cytogenetic analysis with genomic in situ hybridisation (GISH). The BC3S progenies included fertile plants exhibiting high seedling (cotyledon) and adult plant resistance associated with the presence of an acrocentric addition chromosome from S. arvensis. In addition, some individuals with adult plant resistance but cotyledon susceptibility were observed to have a normal B. napus karyotype with no visible GISH signals, indicating possible resistant introgression lines. Phytopathological analysis of selfing progenies from 3 different highly resistant BC3 plants showed that seedling and adult plant resistance are probably conferred by different loci.Type of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesStaff View
ISSN: 1432-2242Keywords: Key wordsBrassica ; Raphanus ; Interspecific hybrids ; Genomic in situ hybridization ; GISHSource: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: Abstract Genomic in situ hybridization (GISH) methods were used to detect different genome components within Brassica amphidiploid species and to identify donor chromatin in hybrids between Brassica napus and Raphanus sativus. In Brassica juncea and Brassica carinata the respective diploid donor genomes could be reliably distinguished by GISH, as could all R-genome chromosomes in the intergeneric hybrids. The A- and C-genome components in B. napus could not be clearly distinguished from one another using GISH, confirming the considerable homoeology between these genomes. GISH methods will be extremely beneficial for monitoring chromatin transfer and introgression in interspecific Brassica hybrids.Type of Medium: Electronic ResourceURL: