Publication Date:
2003-03-15
Description:
In a wild plant-pathogen system, host resistance and pathogen virulence varied markedly among local populations. Broadly virulent pathogens occurred more frequently in highly resistant host populations, whereas avirulent pathogens dominated susceptible populations. Experimental inoculations indicated a negative trade-off between spore production and virulence. The nonrandom spatial distribution of pathogens, maintained through time despite high pathogen mobility, implies that selection favors virulent strains of Melampsora lini in resistant Linum marginale populations and avirulent strains in susceptible populations. These results are consistent with gene-for-gene models of host-pathogen coevolution that require trade-offs to prevent pathogen virulence increasing until host resistance becomes selectively neutral.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thrall, Peter H -- Burdon, Jeremy J -- New York, N.Y. -- Science. 2003 Mar 14;299(5613):1735-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Commonwealth Scientific and Industrial Research Organization (CSIRO)-Plant Industry, Centre for Plant Biodiversity Research, General Post Office Box 1600, Canberra, ACT 2601, Australia. Peter.Thrall@csiro.au〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12637745" target="_blank"〉PubMed〈/a〉
Keywords:
Basidiomycota/genetics/*pathogenicity/physiology
;
*Biological Evolution
;
Flax/genetics/*microbiology/physiology
;
Genes, Fungal
;
Genes, Plant
;
*Genetic Variation
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Models, Genetic
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Plant Diseases/*microbiology
;
Selection, Genetic
;
Spores, Fungal
;
Virulence/*genetics
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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