Evolution of virulence in a plant host-pathogen metapopulation

被引：317

作者：

Thrall, PH ^{[1
]}

Burdon, JJ ^{[1
]}

机构：

[1] CSIRO Plant Ind, Ctr Plant Biodivers Res, Canberra, ACT 2601, Australia

来源：

SCIENCE | 2003年 / 299卷 / 5613期

关键词：

D O I：

10.1126/science.1080070

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页码：1735 / 1737

页数：3

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