Interactions Between Avena and Puccinia Species. II. The Pathogens: Puccinia coronata CDA and P. graminis Pers. F. Sp. avenae Eriks. &amp; Henn.

Oates, J. D.; Burdon, Jeremy J.; Brouwer, J. B.

doi:10.2307/2403528

Cited by 66 publications

(21 citation statements)

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“…The results suggest that a metapopulation or broader geographic structure may be essential for maintaining these coevolving polymorphisms in the plants and in the rust. Related studies (see Burdon and Thrall 1999, in this issue) providing evidence for the importance of geographic structuring in plant-pathogen interactions in natural communities include analyses of Avena and Puccinia species Oates et al 1983), Silene vulgaris and Erysiphe fischeri in Britain (Clarke 1997), S. vulgaris and Ustilago violacea in North America (Antonovics et al 1994(Antonovics et al , 1997Thrall and Antonovics 1995), and Filipendula ulmaria and Triphragmium ulmariae (Burdon et al 1995).…”

Section: Gene-for-gene Coevolution and Polymorphismsmentioning

confidence: 99%

Specific Hypotheses on the Geographic Mosaic of Coevolution

Thompson

1999

The American Naturalist

741

847

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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. abstract: Coevolution is one of the major processes organizing the earth's biodiversity. The need to understand coevolution as an ongoing process has grown as ecological concerns have risen over the dynamics of rapidly changing biological communities, the conservation of genetic diversity, and the population biology of diseases. The biggest current challenge is to understand how coevolution operates across broad geographic landscapes, linking local ecological processes with phylogeographic patterns. The geographic mosaic theory of coevolution provides a framework for asking how coevolution continually reshapes interactions across different spatial and temporal scales. It produces specific hypotheses on how geographically structured coevolution differs from coevolution at the local scale. It also provides a framework for understanding how local maladaptation can result from coevolution and why coevolved interactions may rarely produce long lists of coevolved traits that become fixed within species. Long-term field studies of the same interaction across multiple communities and spatially structured mathematical models are together beginning to show that coevolution may be a more important ongoing process than had been indicated by earlier empirical and theoretical studies lacking a geographic perspective.

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Section: Gene-for-gene Coevolution and Polymorphismsmentioning

confidence: 99%

Specific Hypotheses on the Geographic Mosaic of Coevolution

Thompson

1999

The American Naturalist

741

847

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“…Temporal changes in virulence structure were shown in populations of Puccinia coronata and P. graminis f.sp. avenae collected in Australian wild oat populations (Oates et al, 1983), but Burdon & Jarosz (1992) found that the diversity of M. lini populations for virulence showed little variation either within populations across years or between populations within years.…”

Section: Introductionmentioning

confidence: 99%

Genetic variability of Colletotrichum lindemuthianum in wild populations of common bean

Sicard

Buchet²,

Michalakis

et al. 1997

Plant Pathology

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The genetic structure of wild populations of Colletotrichum lindemuthianum was evaluated for virulence and molecular markers. Forty-five isolates were collected from five wild common bean populations located in their South-Andean centre of origin. The five pathogen populations were monomorphic in their ITS regions, but 45 polymorphic markers were identified using RAPDs. Polymorphism for virulence was also observed; 15 pathotypes were characterized on an international set of 12 differentials. A molecular variance analysis (AMOVA) showed that a very large part of the total genetic variation was within populations. Statistical analysis showed that there was a weak though significant differentiation among the five populations for the RAPD and virulence markers. A positive and significant correlation was found between geographic distance and the distances from RAPD and virulence data, suggesting migration between adjacent populations along the Argentinian transect. Our results suggest that the Andean wild isolates of C. lindemuthianum do not reflect all the putative diversity found in the isolates from cultivated common bean.

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“…Wild host populations are genetically much more diverse than cultivated crops and this may influence the genetic diversity of the pathogen populations. However, no clear pattern emerges to date, with either fewer pathotypes found in wild than cultivated populations (35) or no difference in structure found between the two (32). On the other hand, pathogen populations on wild versus cultivated host populations may be differentiated for neutral markers even if they share similar pathotypes because of limits to gene flow between the two types of host populations.…”

mentioning

confidence: 99%

Comparison of Genetic and Virulence Diversity ofMelampsora larici-populinaPopulations on Wild and Cultivated Poplar and Influence of the Alternate Host

Gérard¹,

Husson²,

Pinon³

et al. 2006

Phytopathology®

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The aims of this study were, first, to compare the genetic and virulence diversity between populations of the rust fungus Melampsora larici-populina on wild and cultivated poplar stands and, second, to investigate the influence of the presence of the alternate host of the pathogen, larch, on which its sexual reproduction occurs, on these diversities. Nine French M. larici-populina populations collected from poplar trees in autumn and four populations collected from larch trees during the following spring were analyzed using both virulence factors and neutral markers. In all, 30 pathotypes were identified within the 13 populations studied. The pathotypic structure clearly distinguished the cultivated stands with high richness and complexity from the wild stands with low richness and complexity. High linkage disequilibria between virulences indicated preferential virulence associations, probably due to selection by the host. In all, 19 random amplified polymorphic DNA (RAPD) markers were used, which revealed a very high genetic diversity in the 743 isolates analyzed. The nine populations from poplar appeared moderately differentiated, indicating long-distance gene flow, and no isolation by distance was found. Linkage disequilibria between RAPD markers generally were low, indicating frequent recombination, but they were not lower in populations located near larch, probably due to long-distance dispersal.

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Interactions Between Avena and Puccinia Species. II. The Pathogens: Puccinia coronata CDA and P. graminis Pers. F. Sp. avenae Eriks. & Henn.

Cited by 66 publications

References 0 publications

Specific Hypotheses on the Geographic Mosaic of Coevolution

Specific Hypotheses on the Geographic Mosaic of Coevolution

Genetic variability of Colletotrichum lindemuthianum in wild populations of common bean

Comparison of Genetic and Virulence Diversity ofMelampsora larici-populinaPopulations on Wild and Cultivated Poplar and Influence of the Alternate Host

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