Genetics of resistance toPuccinia coronataf. sp.avenaein twoAvena sativaaccessions

Chong, J.; Brown, P. D.

doi:10.1080/07060669609500626

Cited by 28 publications

(11 citation statements)

References 15 publications

(10 reference statements)

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“…Entretanto a resistência conferida por este gene não é efetiva contra um grande número de biótipos de P. coronata, para que seja considerada um boa fonte de resistência ao fungo. CHONG & BROWN (1996) mostraram que a resistência à ferrugem da folha existente no acesso de aveia MG 85039 é determinada por dois genes complementares dominantes e que a existente no acesso MG 685181 é determinada por um único gene dominante, sendo que este gene tem mostrado grande utilidade como fonte de resistência no Canadá é foi designado Pc96. Em um estudo desenvolvido no Canadá, foi observado que a cultivar Dumont apresenta um terceiro gene de resistência à ferrugem da folha, uma vez que anteriormente já se sabia que a cultivar possuía os genes de resistência designados de Pc38 e Pc39, o terceiro gene detectado foi denominado de Pcx e se mostrou ligado ao gene de resistência à ferrugem do colmo Pg 9 (CHONG et al 1994).…”

Section: Resultsunclassified

Herança da resistência à ferrugem da folha da aveia (Puccinia coronata f. sp. avenae Fraser & Led.) em genótipos brasileiros de aveia branca

et al. 2006

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RESUMO A ferrugem da folha da aveia é a moléstia mais importante que ataca a cultura da aveia, ocorrendo em praticamente todas as áreas em que a aveia é cultivada. A forma mais indicada para o seu controle é a utilização i) URPEL 15 (R) x UFRGS 7 (S), UPF 16 (R) x UFRGS 7 (S) e URPEL 15 (R) x UPF 16 (R), para a determinação da herança da resistência ao isolado um (1); ii) URPEL 15 (R) x UFRGS 7 (S), UPF 18 (R) x UFRGS 7 (S) e URPEL 15 (R) x UPF 18 (R), para a determinação da herança da resistência ao isolado dois (2); iii) URPEL 15 (R) x UFRGS 7 (S) e URPEL 15 (R) x UPF 18 (S), para a determinação da herança da resistência ao isolado três (3). Os resultados obtidos ABSTRACT Oat crown rust is the most important disease for the oat crop, occurring in practically all the areas where oat is cultivated. The most indicated form of control for this disease is the use of resistant cultivars. However, for the durable resistance to be acquired, it is necessary to know the genetics of resistance to crown rust in oats. Thus, the objective of this work was to determine the type of inheritance of resistance to three Puccinia coronata f. sp. avenae Fraser & Led., isolates (collected in southern Brazil) in brazilian white oat genotypes. To determine the inheritance of resistance to each one of three isolates,F 2 populations were used generated through artificial crosses, between resistant (R) and susceptible (S) and between resistant genotypes (R). Thus, F 2 populations from the following artificial crosses: i) URPEL 15 (R) x UFRGS 7 (S), UPF 16 (R) x UFRGS 7 (S) and URPEL 15 (R) x UPF 16 (R), were used to determine the inheritance of resistance to isolate one (1); ii) URPEL 15 (R) x UFRGS 7 (S), UPF 18 (R) x UFRGS 7 (S) and URPEL 15 (R) x UPF 18 (R), to determine the inheritance of resistance to isolate two (2); iii) URPEL 15 (R) x UFRGS 7 (S) and URPEL 15 (R) x UPF 18 (S), to determine the inheritance of resistance to isolate three (3).

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Section: Resultsunclassified

Herança da resistência à ferrugem da folha da aveia (Puccinia coronata f. sp. avenae Fraser & Led.) em genótipos brasileiros de aveia branca

et al. 2006

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“…[29] also reported two and five linked genes respectively conditioning crown rust resistance in diploid oat. In another study by Chong and Brown [30] two to five clustered genes were reported as responsible for crown rust resistance in A . sativa .…”

Section: Discussionmentioning

confidence: 99%

Mapping of crown rust resistance gene Pc53 in oat (Avena sativa)

2018

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Crown rust disease caused by the fungus Puccinia coronata f. sp. avenae (Pca) is a major production constraint of oat in North America, Europe, and Australia. There are over 100 genes effective against one or more Pca races, but only a handful of seedling resistance (Pc) genes have been mapped to a known chromosomal location. The goal of the present study was to use linkage mapping to identify the genomic location of the Pc53 gene, and to produce a list of linked SNPs with potential as molecular markers for marker assisted breeding. The Pc53 gene was placed on the linkage group Mrg08 at 82.4 cM using F5-derived recombinant inbred lines (RILs) from a cross between the Pc53 carrier 6-112-1-15 (PI 311624) and the susceptible cultivar Otana. The map location was validated using RILs from a cross between 6-112-1-15 and the Pc50 differential line. Single nucleotide polymorphism marker GMI_ES02_c14533_567 was the closest to Pc53. A major seedling resistance gene ‘PcKM’ and QTL QcC.Core.08.1, QCr.Core.08.2, QCr.Core.08.3 and QCr.cdl9-12D were previously reported on Mrg08. QPc.Core.08.1 and PcKM were mapped to within 1 cM of Pc53; but previous virulence studies have indicated separate identities. The chromosomal location of Pc53 and SNPs linked with it will facilitate the utilization of Pc53 in oat breeding programs.

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“…The line 04P01 was an F 1 from the cross of AC Morgan/01RAT23 (Kibite and Menzies, 2001), with the breeding line designated as 01RAT23 resulting from the cross of Pinnacle/Pc96 (Mitchell Fetch, et al 2003). The crown rust Pc96 single gene differential line is a selection derived from an Avena sativa accession from the Italian Gene Bank, Bari, Italy (Chong and Brown, 1996). The paternal parent in the cross was 99P26-BY1D, which resulted from the 3-way cross of Riel/ND931475//HiFi (McKenzie et al 1986;McMullen et al 2005), in which HiFi has Pc91.…”

Section: Pedigree and Breeding Methodsmentioning

confidence: 99%

“…AAC Oravena is thus the first oat cultivar to carry Pc96 registered in Canada. This gene remains effective to the prevalent races in the prairie population since it was first tested in 1996 (Chong and Brown 1996). The resistance gene Pc91 was highly effective until 2011, after which a shift occurred in the crown rust pathogen population, with virulence to Pc91.…”

Section: Disease Reactionmentioning

confidence: 99%