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  • Hessian fly resistance  (1)
  • Leaf rust  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Transfer of Hessian fly resistance from ‘Chaupon’ rye to hexaploid wheat via a 2BS/2RL wheat-rye chromosome translocation (1990)
    Springer
    Theoretical and applied genetics 79 (1990), S. 385-389 
    Details
    ISSN: 1432-2242
    Keywords: Hessian fly resistance ; Insect antibiosis ; Wheat-rye hybrids ; C-banding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Four wheat-rye lines derived from a cross between hexaploid wheat ‘ND 7532’ and ‘Chaupon’ rye were homogeneous for resistance to biotype L of the Hessian fly,Mayetiola destructor. Because the wheat parent was susceptible and the rye parent was resistant to larval feeding, resistance was derived from rye. Resistance of ‘Chaupon’ and the wheat-rye lines was expressed as larval antibiosis. First-instar larvae died after feeding on plants. Chromosomal analyses using C- and N-banding techniques were performed on plants of each line to identify genomes and structural changes of chromosomes. Results showed that two of the resistant lines were chromosome addition lines carrying either the complete rye chromosome,2R, or only the long arm of2R. The other two resistant lines were identified as being2BS/ 2RL wheat-rye translocation lines. It was concluded, therefore, that the long arm of rye chromosome2R carries a gene or gene complex that conditions antibiosis to Hessian fly larvae and, in the2BS/2RL translocation lines, this rye chromatin is cytologically stable and can be used directly in wheat breeding programs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01186083
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Use of winter wheat x Triticum tauschii backcross populations for germplasm evaluation (1995)
    Springer
    Theoretical and applied genetics 90 (1995), S. 571-577 
    Details
    ISSN: 1432-2242
    Keywords: Triticum tauschii ; Aegilops squarrosa Wheat ; Yield ; Protein ; Hardness ; Leaf rust
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The wild diploid goatgrass, Triticum tauschii (Coss.) Schmal., is an important source of genes for resistance to both diseases and insects in common wheat (Triticum aestivum L.) We have evaluated grain yield, kernel weight, protein concentration, and kernel hardness of 641 BC2 F1-derived families from direct crosses involving four T. aestivum cultivars and 13 T. tauschii accessions over 2 years and at two Kansas, USA, locations. On average, T. tauschii germplasm depressed grain yield and increased protein concentration, whereas kernel weight was affected either positively or negatively, depending on the T. tauschii parent. Three T. tauschii parents produced a large proportion of families with very soft endosperm. Some variation among progeny of different T. tauschii parents resulted from the segregation of genes for resistance to leaf rust (caused by Puccinia recondita Rob. ex Desm.). This study confirmed that random BC2-derived families can be used to evaluate the effects of T. tauschii genes in the field. This methodology, although laborious, can provide useful information which is not obtainable by the screening of T. tauschii accessions themselves.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00222005
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    Paper (German National Licenses)
    Fulltext
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