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  • Puccinia graminis tritici  (3)
  • Rust resistance  (3)
  • ionosphere  (3)
  • 1
    Digitale Medien
    Digitale Medien
    Genetics of resistance to Puccinia graminis tritici in ‘Chris’ and ‘W3746’ wheats (1987)
    Springer
    Theoretical and applied genetics 73 (1987), S. 846-855 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Puccinia graminis tritici ; Triticum aestivum ; Monosomic analysis ; Rust resistance ; Gene identification
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary ‘Chris’ wheat possessed genes Sr5, Sr7a, Sr8a, Sr9g and Sr12. ‘W3746’, derived from the cross ‘Chris’/‘Baart’, possessed Sr7a and Sr12. The response conferred by Sr7a was influenced by the genetic background. Although Sr7a or Sr12 alone conferred no observable resistance upon adult plants, the adult resistances of ‘Chris’ and ‘W3746’ to predominant pathotypes appeared to be associated with the interaction of Sr7a and Sr12, or genes at closely linked loci.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00289389
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  • 2
    Digitale Medien
    Digitale Medien
    Genetics of resistance toPuccinia graminis tritici andPuccinia recondite tritici in four South African wheats (1990)
    Springer
    Theoretical and applied genetics 79 (1990), S. 401-410 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Puccinia graminis tritici ; Puccinia recondita Tritici ; Triticum aestivum ; Rust resistance ; Gene identification
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Genes for resistance toPuccinia graminis tritici andPuccinia recondita tritici identified in four South African wheats were:Sr6,Sr8a,Sr9e, andLr13 in ‘W3762’;Sr5,Sr8a,Sr9b,Sr12,Sr24,Lr13, andLr24 in ‘W3760’;Sr2,Sr24,SrC,Lr13, andLr24 in ‘W3751’; andSr7a,Sr23,Sr36, andLr16 in ‘W3755’. GenesSr2,Sr9e, andSr24 also conferred adult plant resistance to the predominant pathotypes ofP. graminis tritici. GenesSr7a,Sr23, andSrC, when present alone, did not confer acceptable adult plant resistance, even though low seedling reactions were associated with them when tested with the same pathotypes. Genetic recombination betweenLr13 andSr9e was estimated at 12.5%±2.3%.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01186086
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  • 3
    Digitale Medien
    Digitale Medien
    Characterization of variability and relationships among components of partial resistance to leaf rust in CIMMYT bread wheats (1991)
    Springer
    Theoretical and applied genetics 82 (1991), S. 674-680 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Puccinia recondita tritici ; Triticum aestivum ; Rust resistance
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary A study of spring bread wheat (Triticum aestivum) germ plasm developed at the International Maize and Wheat Improvement Center (CIMMYT) showed highly significant phenotypic variability for each component of partial resistance (namely, uredial appearance period, latency period, uredial number and uredial size) to Puccinia recondita f. sp. tritici. All of the wheat genotypes displayed longer uredial appearance and latency periods and decreased uredial number and uredial size when compared to the susceptible check cultivar ‘Morocco’. Positive correlations between uredial appearance period and latency period, and uredial number and uredial size, and negative correlations between uredial appearance and latency periods and uredial number and uredial size, inclusive, suggested that the components of partial resistance were either tightly linked or under pleiotropic genetic control. Compared to ‘Morocco’, all entries had slow disease progress in the field and variation occurred in the germ plasm for the area under the leaf rust progress curve. Disease progress was negatively correlated with uredial appearance and latency periods, whereas a positive correlation was observed with uredial number and uredial size. Certain genotypes displayed high levels of partial resistance resulting in low disease incidence in the field.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00227310
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  • 4
    Digitale Medien
    Digitale Medien
    Genetics of resistance to Puccinia graminis tritici and Puccinia recondita tritici in Kenya Plume wheat (1986)
    Springer
    Euphytica 35 (1986), S. 245-256 
    Details
    ISSN: 1573-5060
    Schlagwort(e): Triticum aestivum ; wheat ; Puccinia graminis tritici ; stem rust ; Puccinia recondita tritici ; leaf rust ; rust resistance ; seedling resistance ; adult-plant resistance ; genetic linkage
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary Seven genes, viz. Sr5, Sr6, Sr7a, Sr8a, Sr9b, Sr12 and Sr17 were associated with seedling resistance to Puccinia graminis tritici in Kenya Plume wheat. The predominant field cultures were avirulent on seedlings with Sr7a, but possessed virulence for the other six genes. However, Sr7a did not confer adult-plant resistance when present on its own. Adult-plant resistance was attributed to Sr2 and possibly also to the interaction of Sr7a and Sr12. Two genes, Lr13 and Lr14a, were identified in seedling tests with various cultures of Puccinia recondita tritici. Lr13 conferred adult-plant resistance to the predominant field strains. Genetic recombination between Lr13 and Sr9b was estimated at 17.6±3.1%.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00028563
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  • 5
    Digitale Medien
    Digitale Medien
    Day time observations of precursors at low latitude (1996)
    Springer
    Earth, moon and planets 73 (1996), S. 267-275 
    Details
    ISSN: 1573-0794
    Schlagwort(e): Earth atmosphere ; ionosphere ; whistlers
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract Whistler precursors observed during day time at low latitude ground station Gulmarg (Geomag. Lat. 24
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00115885
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  • 6
    Digitale Medien
    Digitale Medien
    Propagational features of higher harmonic tweeks at low latitudes (1996)
    Springer
    Earth, moon and planets 73 (1996), S. 277-290 
    Details
    ISSN: 1573-0794
    Schlagwort(e): Earth atmosphere ; ionosphere ; whistlers
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract Higher harmonic tweeks observed for the first time at the low latitude station Varanasi (geomag. lat. 14
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00115886
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  • 7
    Digitale Medien
    Digitale Medien
    Whistler observations of the quiet time plasmasphere-ionosphere coupling fluxes at low latitude (1996)
    Springer
    Earth, moon and planets 74 (1996), S. 7-15 
    Details
    ISSN: 1573-0794
    Schlagwort(e): atmospheric plasma ; ionosphere
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract Observations of whistlers during quiet times made at low-latitude ground station Nainital (geomag. lat. 19
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00118718
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