Suggestions for Determination and Terminology of Pathotypes and Genes for Resistance in Cyst‐forming Nematodes, especially Heterodera avenae1

Andersen, Sigurd; Andersen, Kirsten

doi:10.1111/j.1365-2338.1982.tb01819.x

Cited by 51 publications

(34 citation statements)

References 31 publications

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“…Cre5 confers partial resistance to Ha12, Ha41, and Ha13 pathotypes of H. avenae (Rivoal et al 1993;Jahier et al 2001;Ogbonnaya et al 2001 Resistance Nursery, containing seven of the known Cre genes, has been distributed to collaborators around the world in order to establish the value of these genes in different regions. Pathotypes are differentiated by testing unknown populations against a matrix of cereals in the International Cereal Test Assortment for defining CCN pathotypes, developed by Andersen and Andersen (1982). This test distinguishes three primary groups, based on host resistance reactions of barley cultivars carrying the resistance genes Rha1, Rha2, and Rha3.…”

Section: Ccn Pathotypesmentioning

confidence: 99%

The importance and management strategies of cereal cyst nematodes, Heterodera spp., in Turkey

Dababat¹,

İmren

Erginbaş-Orakci³

et al. 2014

Euphytica

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Cereal cyst nematodes (CCNs) can cause significant economic yield losses alone or in combination with other biotic and abiotic factors. The damage caused by these nematodes can be enormous when they occur in a disease complex, particularly in areas subject to water stress. Of the 12 valid CCN species, Heterodera avenae, H. filipjevi, and H. latipons are considered the most economically important in different parts of the world. This paper reviews current approaches to managing CCNs via genetic resistance, biological agents, cultural practices, and chemical strategies. Recent research within the soil borne pathogen program of the International Maize and Wheat Improvement Center has focused on germplasm screening, the potential of this germplasm as sources of resistance, and how to incorporate new sources of resistance into breeding programs. Breeding for resistance is particularly complicated and difficult when different species and pathotypes coexist in nature. A lack of expertise and recognition of CCNs as a factor limiting wheat production potential, combined with inappropriate breeding strategies and slow screening processes limit genetic gains for resistance to CCNs.

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Section: Ccn Pathotypesmentioning

confidence: 99%

The importance and management strategies of cereal cyst nematodes, Heterodera spp., in Turkey

Dababat¹,

İmren

Erginbaş-Orakci³

et al. 2014

Euphytica

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show abstract

“…Festiguay (Brown, 1982 ;Paull et al, 1998) and the Cre3 and Cre4 genes derived from the diploid wheat Aegilops tauschii (Eastwood et al, 1991). In barley, resistance to the Australian pathotype (Andersen & Andersen, 1982) of CCN is derived from the Ha2 gene present in the barley cultivars Chebec and Sahara (Kretschmer et al, 1997) and the Ha4 gene present in barley cv. Galleon (Barr et al, 1998).…”

Section: mentioning

confidence: 99%

“…Emerging seedling roots of several resistant and susceptible cereal plants were used in this study to observe the development of the syncytium after infection with the Australian pathotype (Andersen & Andersen, 1982) of cereal cyst nematode (Heterodera avenae Wollenweber). The resistant plants included in this study, and the R gene involved in conferring resistance to CCN in each case, include : bread wheat (Triticum aestivum L.) cv.…”

Section: Host Plantsmentioning

confidence: 99%

Root responses to cereal cyst nematode (Heterodera avenae) in hosts with different resistance genes

et al. 2000

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The development of cereal cyst nematode (CCN ; Heterodera avenae) induced syncytia in the host roots of infected resistant bread wheat (Triticum aestivum cv. AUS10894), diploid wheat (Aegilops tauschii), barley (Hordeum vulgare cv. Chebec and cv. Galleon) and in the susceptible wheat cv. Meering and barley cv. Clipper were studied over a period of 13 d. The resistance to CCN in these cereal plants is conferred by the resistance genes Cre1 in the wheat cv. AUS10894, Cre3 in A. tauschii, Ha2 in barley cv. Chebec and Ha4 in barley cv. Galleon. Anatomical observations were made on the development of the syncytia in CCN-infected wheat and barley roots, which carry each of these four sources of resistance genes. Accelerated development of the syncytia in resistant plants, especially in the barley cultivars, was observed. The sites of syncytia development in susceptible wheat and barley were also closely associated with the vascular tissues in the stele, but less so in the resistant plants. The syncytia in the infected susceptible wheat and barley were also metabolically active at day 13. By contrast, the syncytia of resistant wheat plants carrying the Cre1 or Cre3 genes remained extensively vacuolated and less metabolically active. In barley plants with the Ha2 or Ha4 genes, the syncytia appeared non-functional and in early stages of degeneration by day 13 after inoculation.

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“…In 1981, the behaviour of the parents, the Fl, F2 and BC I populations was tested against race Fr3 derived from Argentan (Orne, France) corresponding to pathotype Ha 11 (ANDERSEN & ANDERSEN, 1982) . The following year, the progenies of a number of F2 and BC 1 plants were studied with Gambo for standard .…”

Section: Methodsmentioning

confidence: 99%

Genetic resistance to cereal cyst nematode Heterodera avenae Woll. in wild oat Avena sterilis I. 376

Clamot¹,

Rivoal²

1984

Euphytica

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Suggestions for Determination and Terminology of Pathotypes and Genes for Resistance in Cyst‐forming Nematodes, especially Heterodera avenae1

Cited by 51 publications

References 31 publications

The importance and management strategies of cereal cyst nematodes, Heterodera spp., in Turkey

The importance and management strategies of cereal cyst nematodes, Heterodera spp., in Turkey

Root responses to cereal cyst nematode (Heterodera avenae) in hosts with different resistance genes

Genetic resistance to cereal cyst nematode Heterodera avenae Woll. in wild oat Avena sterilis I. 376

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