Resistance of the Race-Specific Type

Dyck, P. L.; Kerber, E. R.

doi:10.1016/b978-0-12-148402-6.50023-7

Cited by 48 publications

(32 citation statements)

References 61 publications

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“…However, resistance increased at the higher ploidy level irrespective of cytoplasmic differences . These results are contrary to general experience indicating comparable dilution of resistance with increasing ploidy levels (see Dyck & Kerber, 1985) . The susceptibility of T persicum and cv.…”

Section: Discussioncontrasting

confidence: 56%

Characterisation and origin of rust and powdery mildew resistance genes in VPM1 wheat

Bariana

McIntosh

1994

Euphytica

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Section: Discussioncontrasting

confidence: 56%

Characterisation and origin of rust and powdery mildew resistance genes in VPM1 wheat

Bariana

McIntosh

1994

Euphytica

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“…Many of the early differentials had more than one resistance gene and also had genes in common which reduced their effectiveness in distinguishing rust races. Later as knowledge was gained about the genetics of rust resistance in wheat [18], cultivars with identified single genes for rust resistance were used as differentials. As an increased number of rust resistance genes were characterized in wheat germplasm, single resistance genes were transferred into single wheat genotype backgrounds by backcrossing ( Figure 3) [19].…”

Section: Pathogen Variationmentioning

confidence: 99%

“…Most resistance genes are effective in seedling plants and remain effective through the adult plant stage. Genes such as Lr1, Lr10, and Lr21 are good examples of race specific resistance genes that are effective in seedling and adult plants [18]. These genes condition very low infection types of hypersensitive flecks or minute uredinia surrounded by necrosis and chlorosis to avirulent rust isolates (Figure 3).…”

Section: Leaf Rust Resistance In Wheatmentioning

confidence: 99%

Leaf Rust of Wheat: Pathogen Biology, Variation and Host Resistance

Kolmer

2013

Forests

124

118

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Abstract:Rusts are important pathogens of angiosperms and gymnosperms including cereal crops and forest trees. With respect to cereals, rust fungi are among the most important pathogens.Cereal rusts are heteroecious and macrocyclic requiring two taxonomically unrelated hosts to complete a five spore stage life cycle. Cereal rust fungi are highly variable for virulence and molecular polymorphism. Leaf rust, caused by Puccinia triticina is the most common rust of wheat on a worldwide basis. Many different races of P. triticina that vary for virulence to leaf rust resistance genes in wheat differential lines are found annually in the US. Molecular markers have been used to characterize rust populations in the US and worldwide. Highly virulent races of P. triticina are selected by leaf rust resistance genes in the soft red winter wheat, hard red winter wheat and hard red spring wheat cultivars that are grown in different regions of the US. Cultivars that only have race-specific leaf rust resistance genes that are effective in seedling plants lose their effective resistance and become susceptible within a few years of release. Cultivars with combinations of race non-specific resistance genes have remained resistant over a period of years even though races of the leaf rust population have changed constantly.

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“…Linkages to DNA markers may also be helpful in determining if the gènes for résistance from the diploid wheatare uniquefrom known gènes in tetraploid or hexaploid wheats. Finally, improved methods must be devised for the transfer and expression of gènes from diploid wheatsto hexaploid wheats (Dyck and Kerber 1985;Sharma 1995;Sharma and Gill 1983).…”

Section: Resultsmentioning

confidence: 99%

Genetics of resistance to Hessian fly (Mayetiola destructor) [Diptera : Cecidomyiida] biotype L in diploid wheat

Sharma¹,

Ohm²,

Patterson³

et al. 2005

phyto

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Hessian fly (Mayetiola destructor) is a serious pest of wheat (Triticum spp.) and of the reported biotypes of Hessian fly, biotype L is described as the most virulent. Inheritance of resistance to Hessian fly biotype L was investigated in crosses of a resistant accession of Triticum monococcum, and two susceptible accessions of T. monococcum and one susceptible accession of T. boeoticum, all diploid wheats. F2 and testeross (backeross) families were classified for reaction to Hessian fly in the seedling stage and analysed by Chi-square goodness-of-fit tests for genetic segregation ratios of resistant or segregating families to susceptible families. Resistance was found to be simply inherited, controlled by one or two genes. This is the first report on the inheritance of resistance to Hessian fly in A-genome diploid wheats, and simple genetic control indicates possibility of transfer of this trait to cultivated wheats.

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Resistance of the Race-Specific Type

Cited by 48 publications

References 61 publications

Characterisation and origin of rust and powdery mildew resistance genes in VPM1 wheat

Characterisation and origin of rust and powdery mildew resistance genes in VPM1 wheat

Leaf Rust of Wheat: Pathogen Biology, Variation and Host Resistance

Genetics of resistance to Hessian fly (Mayetiola destructor) [Diptera : Cecidomyiida] biotype L in diploid wheat

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