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1

Electronic Resource

RFLP mapping of a new cereal cyst nematode resistance locus in barley (1998)

Barr, A. R. ; Chalmers, K. J. ; Karakousis, A. ; [et al.]

Oxford, UK : Blackwell Publishing Ltd

Plant breeding 117 (1998), S. 0

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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’×‘Galleon’ 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

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2

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Mapping of Malt Endopeptidase, NADH Diaphorase and Esterase Loci on Barley Chromosome 3L (1994)

Guerin, J. R. ; Lance, R. C. M. ; Brown, A. H. D. ; [et al.]

Oxford, UK : Blackwell Publishing Ltd

Plant breeding 112 (1994), S. 0

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ISSN: 1439-0523

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: Isoelectric focusing (IEF) and immunoblotting were used to detect genetic variants of malt endopeptidase (MEP1), an enzyme related to malting quality in barley and coded by the CepB locus on barley chromosome 3 (= 3H). A variant was found in a Turkish accession of wild barley (Hordeum vulgare ssp. spontaneum). The self progeny of a hybrid between this accession and the barley cultivar ‘Clipper’ were analyzed for recombination between the CepB locus and other isozyme loci. The estimates of recombination linked the CepB locus to an NADH diaphorase locus (Ndh2), which in turn was linked to the seedling esterase complex (Est1, Est2, and Est4) situated near the distal end of the long arm of chromosome 3. The Ndh2 locus was independent of two other NADH dehydrogenase loci (Ndh3, Ndh5) which were mapped on barley chromosome 5 (= 1H) in relation to the three hordein loci (Hor1, Hor2, and Hor3).

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1439-0523.1994.tb00685.x

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3

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Detection of quantitative trait loci for agronomic, yield, grain and disease characters in spring barley (Hordeum vulgare L.) (1995)

Thomas, W. T. B. ; Powell, W. ; Waugh, R. ; [et al.]

Springer

Theoretical and applied genetics 91 (1995), S. 1037-1047

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ISSN: 1432-2242

Keywords: Barley ; QTLs ; Linkage ; Yield ; Markers

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Notes: Abstract Quantitative trait loci (QTLs) have been revealed for characters in a segregating population from a spring barley cross between genotypes adapted to North-West Europe. Transgressive segregation was found for all the characters, which was confirmed by the regular detection of positive and negative QTLs from both parents. A QTL for all the agronomic, yield and grain characters measured except thousand grain weight was found in the region of the denso dwarfing gene locus. There were considerable differences between the location of QTLs found in the present study and those found in previous studies of North American germ plasm, revealing the diversity between the two gene pools. Thirty-one QTLs were detected in more than one environment for the 13 characters studied, although many more were detected in just one environment. Whilst biometrical analyses suggested the presence of epistasis in the genetic control of some characters, there was little evidence of interactions between the QTLs apart from those associated with yield. QTLs of large effect sometimes masked the presence of QTLs of smaller effect.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00223917

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4

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Seven members of the (1→3)-β-glucanase gene family in barley (Hordeum vulgare) are clustered on the long arm of chromosome 3 (3HL) (1996)

Li, C. -D. ; Langridge, P. ; Lance, R. C. M. ; [et al.]

Springer

Theoretical and applied genetics 92 (1996), S. 791-796

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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

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5

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RFLP mapping of the Ha 2 cereal cyst nematode resistance gene in barley (1997)

Kretschmer, J. M. ; Chalmers, K. J. ; Manning, S. ; [et al.]

Springer

Theoretical and applied genetics 94 (1997), S. 1060-1064

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ISSN: 1432-2242

Keywords: Key wordsCCN ; RFLP ; Hordeum vulgare ; Heterodera avenae ; Genetic mapping

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Notes: Abstract The cereal cyst nematode (CCN), Heterodera avenae Woll., is an economically damaging pest of barley in many of the world’s cereal-growing areas. The development of CCN-resistant cultivars may be accelerated through the use of molecular markers. A number of resistance genes against the pest are well known; one of them, the single dominant Ha 2 resistance gene, has been shown to be effective against the Australian pathotype and maps to chromosome 2 of barley. Segregation analysis identified two restriction fragment length polymorphism (RFLP) markers flanking the resistance gene in two doubled-haploid populations of barley. AWBMA 21 and MWG 694 mapped 4.1 and 6.1 cM respectively from the Ha 2 locus in the Chebec×Harrington cross and 4.0 and 9.2 cM respectively in the Clipper×Sahara cross. Analysis of a further seven sources of CCN resistance in the form of near-isogenic lines (NILs) indicates that all available sources of resistance to the Australian pathotype of CCN in barley represent the Ha 2 locus.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s001220050515

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6

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Seven members of the (1→3)-β-glucanase gene family in barley (Hordeum vulgare) are clustered on the long arm of chromosome 3 (3HL) (1996)

Li, C.-D. ; Langridge, P. ; Lance, R. C. M. ; [et al.]

Springer

Theoretical and applied genetics 92 (1996), S. 791-796

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ISSN: 1432-2242

Keywords: Key words 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/s001220050194

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