Trade-off between latent period and transmission success of a plant pathogen revealed by phenotypic correlations
Trade-off between latent period and transmission success of a plant pathogen revealed by phenotypic correlations
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表型相关性揭示植物病原体潜伏期和传播成功之间的权衡
DOI：
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发表时间：
2008
影响因子：
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通讯作者：
J. Shykoff
中科院分区：
文献类型：
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作者：
Virginie Héraudet;Lucie Salvaudon;J. Shykoff
问题：权衡取舍和基因-环境交互作用能否保持与健康相关的生活史特征的变异性？假设：传播的成功，相当于繁殖力，与最小化潜伏期(相当于成熟时的年龄)进行了权衡。生物体：非致死寄生虫拟南芥及其寄主拟南芥。方法：我们测量了三个寄生虫菌株和三个寄主品系之间所有感染组合的潜伏期、传播成功率和寄主种子产量，从而计算这些寄生特性之间的表型相关性，并确定寄主和寄主特性之间的关系。结论：孢子萌发较快(潜伏期较短)的受感染植物传播寄生虫的能力较差，揭示了这些重要寄生虫生活史特征之间的表型权衡。这种表型权衡可能有助于解释为什么潜伏期在本质上仍然是可变的，并且没有达到一致的最小值。
Questions: Can trade-offs and genotype–environment interactions maintain variability for fitness-related life-history traits? Hypothesis: Transmission success, the equivalent of fecundity, is traded off against minimizing the latent period, the equivalent of age at maturity. Organisms: The non-lethal parasite Hyaloperonospora arabidopsis (= Hyaloperonospora parasitica) and its host plant Arabidopsis thaliana. Methods: We measured the latent period, transmission success, and host seed production of all combinations of infections between three parasite strains and three host lines, allowing us to calculate phenotypic correlations between these parasite traits and determine the relationship between host and parasite traits. Conclusions: Infected plants that sporulated more rapidly (short latent period) transmitted their parasites less well, revealing a phenotypic trade-off between these important parasite life-history traits. This phenotypic trade-off may help to explain why the latent period remains variable in nature and has not achieved a uniformly minimal value.