Inheritance of Crown Rust Resistance Transferred From Diploid to Hexaploid Oats

Dyck, P. L.; Zillinsky, F. J.

doi:10.1139/g63-056

Cited by 23 publications

(9 citation statements)

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“…The diploid black oat A. strigosa Schreb. has been used in breeding programs; however, despite the large number of resistance genes identified within this species, only Pc23 and Pc94 have been incorporated into a stable A. sativa L. background, due to barriers in the integration of genes (Aung et al 1996;Dyck and Zillinsky 1963). As an example, the Pc94 gene originating from A. strigosa accession RL1697 was introduced into the recently released 'Leggett ' and'Stride' (Mitchell Fetch et al 2007, 2013).…”

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confidence: 99%

Resistance to Puccinia coronata f. sp. avenae in Avena magna, A. murphyi, and A. insularis

et al. 2016

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Wild oat tetraploids of the section Pachycarpa have already been proven to be a rich source of useful genes but have largely been unexploited for Puccinia coronata resistance. In this study, accessions of Avena magna, A. murphyi, and A. insularis gathered from European and North American gene banks were evaluated at the seedling stage for crown rust reaction using the host–pathogen test and six highly diverse and virulent P. coronata isolates. Of the 92 Avena accessions analyzed, 58.7% were resistant to at least one crown rust race. In all, 37% of the tested accessions reacted nonuniformly, which indicated their heterogeneity. The highest level of resistance was observed in three of the accessions, one of which was verified by flow cytometry as being hexaploid and two of which were verified as being tetraploids. The infection profiles of 19 accessions corresponded to resistance determined by the genes Pc14, Pc39, Pc40, Pc48, Pc50, Pc54, Pc55, Pc61, Pc67, Pc68, Pc97, Pc101, or Pc104. The patterns of infection of the remaining resistant A. magna and A. murphyi accessions allowed us to postulate the presence of potentially novel crown rust resistance genes.

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Resistance to Puccinia coronata f. sp. avenae in Avena magna, A. murphyi, and A. insularis

et al. 2016

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“…The scarcity of resistance genes in oat germplasm grown in South Australia led to a search for new sources of resistance in hexaploid, tetraploid, and diploid wild species of Avena. Resistance to some pathotypes of Pca has been found previously in the wild hexaploid oat Avena sterilis L. (Dyck and Zillinsky 1963;Zillinsky and Murphy 1967) and the diploid species Avena strigosa (Ladizinsky 2000;Rines et al 2007). Because the basic chromosome complement of A. sterilis is structurally similar to A. sativa, resistance genes from this source can be introduced readily into cultivated oats through backcrossing.…”

Section: Introductionmentioning

confidence: 69%

“…Strong sterility barriers and the failure of pairing between chromosomes from species with different ploidy levels have tended to isolate the wild diploid species from the cultivated species. Despite these difficulties, the transfer of rust resistance genes from lower ploidy level species into hexaploid cultivated Avena species has been accomplished Simons 1960, 1967;Zillinsky and Derick 1960;Dyck and Zillinsky 1963;Fosberg and Nishiyama 1969;Rines et al 2007).…”

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confidence: 99%

Hybrids of Avena sativa with two diploid wild oats (CIav6956) and (CIav7233) resistant to crown rust

et al. 2010

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Two diploid accessions of wild oat, CIav6956 and CIav7233, were identified as carrying seedling resistance to oat crown rust (caused by Puccinia coronata f. sp. avenae; Pca). Two vigorous interploidy F 1 hybrids were generated from crosses involving the hexaploid oat cultivar Wintaroo and the diploid oat Avena strigosa Schreb. accession CIav6956. An additional interploidy F 1 hybrid, designated ''F1-Aa1'', was produced from a cross of Wintaroo and the diploid oat accession CIav7233. All three hybrids were more vigorous and taller than the cultivated parent Wintaroo. The three F 1 hybrids contained full chromosome complements from both parents (2n = 4x = 28), but no seeds were obtained when the three F 1 hybrids were selfed. Meiotic analyses of the hybrids indicated that they exhibited a high degree of inter-genome and intra-genome pairing. Trivalent configurations were detected in 95-96% of meiotic cells and a minimum of three bivalents was present in all cells. An average chiasma frequency of 7.2-7.9 per cell was observed for the three F 1 hybrids. A fourth F 1 hybrid was subsequently generated from a cross between the diploid oat accession CIav7233 and Wintaroo. One octaploid (2n = 8x = 56) was generated from this hybrid and progeny were resistant to two Pca races. The chromosome number of the octaploid progeny varied between 51 and 54 chromosomes. Development of a chromosome addition line(s) with the crown rust resistance should be possible from these partialoctaploids.

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“…CD 3820), a spring oat collected in Ontario Canada, was used in experiments involving the transfer of crown rust seedling resistance to cultivated hexaploid genotypes (Sadanaga & Simons, 1960; Zillinsky & Derick, 1960). In addition, it was reported to carry the seedling resistance genes Pc15 and Pc23 (Dyck & Zillinsky, 1963). According to an earlier study by Murphy et al (1958), CD 3820 was postulated to carry three genes, and was also reported to be identical to the cultivar Saia with respect to ITs to a number of pathotypes of Pca and the oats stem rust pathogen P. graminis f. sp.…”

Section: Discussionmentioning

confidence: 99%

Identification and genetic characterisation of adult plant resistance to crown rust in diploid and tetraploid accessions of Avena

Cabral

Singh

Park

2011

Annals of Applied Biology

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The identification and genetic characterisation of adult plant resistance (APR) to crown rust, caused by Puccinia coronata f. sp. avenae (Pca), was carried out in diploid Avena strigosa and tetraploid Avena barbata accessions from diverse geographical regions. Seven accessions were found to carry APR to Pca, six of which (CIav6956, CIav7280, CIav8089, CIav9020, PI292226, PI436082) were diploid and one (PI337865) a tetraploid. All six diploid A. strigosa accessions were postulated to carry the ‘Saia’ seedling resistance to Pca (Pc15, Pc16, Pc17) in addition to the APR. Three of these six accessions (CIav6956, CIav9020, PI292226) were used to study both seedling resistance and APR, using two Pca pathotypes, one avirulent on seedlings and the second virulent on seedlings but avirulent on adult plants. The seedling resistance in each was shown to be inherited independently of the APR. In each case, APR was conferred by a single major dominant gene, based on hypersensitivity, coupled with low infection types. Allelism tests are required to determine if these three APR genes are different. This is the first report of APR to crown rust in A. strigosa and A. barbata.

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Inheritance of Crown Rust Resistance Transferred From Diploid to Hexaploid Oats

Cited by 23 publications

References 0 publications

Resistance to Puccinia coronata f. sp. avenae in Avena magna, A. murphyi, and A. insularis

Resistance to Puccinia coronata f. sp. avenae in Avena magna, A. murphyi, and A. insularis

Hybrids of Avena sativa with two diploid wild oats (CIav6956) and (CIav7233) resistant to crown rust

Identification and genetic characterisation of adult plant resistance to crown rust in diploid and tetraploid accessions of Avena

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