Gene-for-gene relationships in the <i>Avena: Puccinia graminis</i> host–parasite system in Canada

Martens, J. W.; McKenzie, R. I. H.; Green, G. J.

doi:10.1139/b70-135

Cited by 29 publications

(12 citation statements)

References 14 publications

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“…Statler & Jin (121) reported that three avirulence genes in Pt were recessive. Other researchers reported recessive avirulences in Pga (52,53,82) and Pc (20). In Pst, avirulences to Yr17 and YrExp1 in the US race PST-127 are controlled by single recessive genes (133).…”

Section: Inheritance Of Avirulence/virulencementioning

confidence: 84%

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Role of Alternate Hosts in Epidemiology and Pathogen Variation of Cereal Rusts

Zhao

Wang

Chen

et al. 2016

Annu. Rev. Phytopathol.

128

104

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Cereal rusts, caused by obligate and biotrophic fungi in the genus Puccinia, are important diseases that threaten world food security. With the recent discovery of alternate hosts for the stripe rust fungus (Puccinia striiformis), all cereal rust fungi are now known to be heteroecious, requiring two distinct plant species serving as primary or alternate hosts to complete their sexual life cycle. The roles of the alternate hosts in disease epidemiology and pathogen variation vary greatly from species to species and from region to region because of different climatic and cropping conditions. We focus this review on rust fungi of small grains, mainly stripe rust, stem rust, leaf rust, and crown rust of wheat, barley, oat, rye, and triticale, with emphases on the contributions of alternate hosts to the development and management of rust diseases.

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Section: Inheritance Of Avirulence/virulencementioning

confidence: 84%

“…Earlier literature on pathogenicity genetics of cereal rust fungi is reviewed by several researchers (81,82,116). Although avirulence can be either dominant or recessive, most avirulence genes in Pgt, Pga, Pt, and Pc are dominant and controlled by single loci (52,91,94,120,121,147).…”

Section: Inheritance Of Avirulence/virulencementioning

confidence: 99%

Role of Alternate Hosts in Epidemiology and Pathogen Variation of Cereal Rusts

Zhao

Wang

Chen

et al. 2016

Annu. Rev. Phytopathol.

128

104

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“…but all the data have been combined for our purposes here. The method used to cha~.acterize the isolates has been described previously (8). The avirulence-virulence formulae (Tables 1, 2) describe the virulence of the various races.…”

Section: Methodsmentioning

confidence: 99%

Virulence dynamics in Puccinia graminis f.sp. avenae in Canada

Martens¹,

McKenzie²

1979

Can. J. Bot.

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Virulence in Puccinia graminis f.sp. avenue has been studied in Canada since 1921. Changes in host resistance, the succession of avirulence–virulence combinations, and changes in the composition of the pathogen population during the ensuing 57 years are presented graphically and indicate that the organism is highly dynamic even when the host population is relatively static. The early years are characterized by the presence of races virulent only on the universally susceptible host or cultivars with a single resistance gene followed by a gradual increase in virulence beginning in 1943 and a differentiation of eastern and western pathogen populations. By 1950 the zero- and one-gene virulence races were being displaced by Pg-1, -2 and Pg-1, -2, -3 virulence combinations in eastern Canada, an event that did not occur in the west until 1961. The latter period was characterized by the combining of virulence on all resistance genes except Pg-8 and Pg-13 in the east and Pg-9 and Pg-13 in the west. Virulence on resistance conferred by gene Pg-13 is still rare.

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“…Gene Pg 13, a recessive gene from a Tunisian collection of A. sterilis discovered in the late 1960s, is the most widely effective and useful gene available to oat breeders, and it occurs in all cultivars released for the eastern Prairies of Canada since 1981. However, virulence on Pgl 3 has been found (Martens et al 1970) and occurs regularly in eastern Canada. Several isolates collected in Canada at least 20 years before the introduction of Pgl3 to North America have recently been found to be virulent on Pgl3 (D.E.…”

mentioning

confidence: 99%