Breeding for resistance to cereal cyst nematode in wheat

Brown, J. A. M.; Ellis, S.

doi:10.1007/bf00041530

Cited by 12 publications

(12 citation statements)

References 7 publications

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“…The 4th and 5th backcross progeny showed a similar distribution of cyst counts to those published (BROWN & ELLIS, 1976) for 216 plants in the first backcross . The percentage of plants with more than 40 cysts (51 .7%) was only slightly higher than the 48 .7% found in the first backcross, whose distribution reflected the initial genetic segregation of resistance undisturbed by errors of selection .…”

Section: Discussionsupporting

confidence: 62%

“…Methods for test tube and soil cultures and resistance assessment have previously been described in detail (BROWN, 1974 ;BROWN & ELLIS, 1976) . Selfed seed used for test tube cultures came from 3rd and 4th backcross plants selected as resistant after growth in naturally infested soil .…”

Section: Methodsmentioning

confidence: 99%

“…into adapted Australian wheat cultivars was described by BROWN & ELLIS (1976) . Assessment of resistance was based on the numbers of immature females (white cysts) produced on seedling roots after culture in pots containing naturally infested soil .…”

Section: Introductionmentioning

confidence: 99%

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Breeding for resistance to cereal cyst nematode in wheat II. Use of test tube cultures in selection

Brown¹

1977

Euphytica

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Triticum aestivum, wheat, Heterodera avenae, cyst nematode, resistance breeding . SUMMARYThe use of soil, naturally infested with Heterodera avenae, to select resistant heterozygotes in backcross progenies of wheat, was tested for reliability . Selfed progenies from plants selected as resistant were cultured monoxenically in test tubes with nematodes hatched from single cysts, while backcross progenies from the same parent plants were grown in pots of naturally infested soil . Cyst counts were made after two months' growth . The results showed that over 50% of the backcross lines, screened in previous generations with naturally infested soil, had been erroneously selected as resistant . The test tube cultures clearly differentiated lines carrying resistance from those which were susceptible and corroborated results from pot tests.

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Section: Discussionsupporting

confidence: 62%

Section: Methodsmentioning

confidence: 99%

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Breeding for resistance to cereal cyst nematode in wheat II. Use of test tube cultures in selection

Brown¹

1977

Euphytica

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“…Identification of the mechanisms of tolerance might enable development of an indirect selection procedure. Brown & Ellis (1976) selected wheat plants with few females and a low degree of (( root knotting D. Such an approach would only be fruitful if resistance and the gross morphological response are separate phenomena under independent genetic control. Chew ( 1979) has associated the greater tolerance of some partially resistant oats with relatively little necrotic response to nematode feeding.…”

Section: Selecting For Tolerancementioning

confidence: 99%

Resistance of Cereals to Heterodera avenae: Methods of Investigation, Sources and Inheritance of Resistance1

Cook¹,

York²

1982

EPPO Bulletin

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Techniques used in cereal breeding programmes for selecting for resistance to cereal cyst nematodes are described. Routine screening is done in field nurseries and in pots of infested soil in glasshouse and controlled environments. Other investigations of resistance use a laboratory technique which permits identification of the penetration sites of individual nematodes. Erosion of resistance, as indicated by 1) the development of only one or two females or 2) the occasional development of more females on plants with resistance genes, is discussed in relation to variation in nematode virulence and to environmental, especially temperature effects. Identification of tolerance is more difficult unless the differences are great, or the experimentation carefully controlled and replicated. Direct selection for tolerance in segregating generations is not presently practicable. Indirectly selecting for mechanisms of tolerance may eventually prove possible but has not yet been exploited. Available sources of resistance are described in relation to genetic studies and complementary studies of nematode pathotype and host range. There are three distinct resistances in barley which may have been responsible for selecting present pathotypes. Two, Rha1 and Rha2, are useful in breeding and linkage and allelism at these loci are described. In oats, as in wheat, only one locus has been used by breeders. There are probably additional loci in some of the other resistance sources but polyploidy of the host and different virulence gene frequencies in unselected nematode populations make it more difficult to identify genetic relationships in oats and wheat.

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“…The dominant resistance gene Cre1, identi ed in Triticum aestivum cv. Loros and AUS10894, has been widely tested through the International Test Assortment for the characterisation of pathotypes and used in breeding programmes in Australia and France (Brown & Ellis, 1976;Andersen & Andersen, 1982;Rivoal et al, 1990). In bread wheat, the new source AUS4930, recently discovered in Australia, presents the advantage of acting against both H. avenae and the root lesion nematode Pratylenchus thornei (Nicol et al, 1999).…”

mentioning

confidence: 98%

Variation in reproductive capacity and virulence on different genotypes and resistance genes of Triticeae, in the cereal cyst nematode species complex

Rivoal¹,

Bekal²,

Valette³

et al. 2001

Nematol

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Two sets of experiments in 1998 and 1999 studied the (a)virulence status of 14 populations of Heterodera avenae, and two populations each of H. lipjevi and H. latipons towards the resistance genes and genotypes of Triticeae, presently known to be resistant to H. avenae, the main species of the cereal cyst nematode (CCN) species complex. Susceptible controls were Triticum aestivum cv. Arminda and Triticum turgidum cv. Cham1. Even in controlled experimental conditions, host responses differed between replicates in the same test and between consecutive tests for unexplained reasons. In spite of that, it has been con rmed that several of these CCN populations differ in their intrinsic capacity to reproduce, and this has to be taken into account in resistance screening. Consequently, the (a)virulence status of a CCN population is better established by a qualitative demarcation between resistant and susceptible plant genotypes based on an average of one cyst limit per plant. The matrix inferred from such a classi cation of host responses of pooled 1998 and 1999 data showed a complex distribution of avirulent and virulent phenotypes in these CCN populations which seems to arise from a mosaic-like evolution. The more or less wide virulence spectrum shown by this complex of populations and species is discussed in relation to their phylogenetic relationships. Correspondence factor analysis of the pooled data demonstrated a geographical demarcation between several populations of H. avenae and the representatives of H. lipjevi and H. latipons for their (a)virulence to either Cre1 or Cre3 genes and T. aestivum AUS4930 genotype. This could reveal local or regional selection of new pathotypes, more particularly in H. avenae. Genetic introgression to improve resistance to these nematodes in both bread and durum wheats is discussed for regional and global applications.

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Breeding for resistance to cereal cyst nematode in wheat

Cited by 12 publications

References 7 publications

Breeding for resistance to cereal cyst nematode in wheat II. Use of test tube cultures in selection

Breeding for resistance to cereal cyst nematode in wheat II. Use of test tube cultures in selection

Resistance of Cereals to Heterodera avenae: Methods of Investigation, Sources and Inheritance of Resistance1

Variation in reproductive capacity and virulence on different genotypes and resistance genes of Triticeae, in the cereal cyst nematode species complex

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