A chemical trait creates a genetic trade-off between intra- and interspecific competitive ability
A chemical trait creates a genetic trade-off between intra- and interspecific competitive ability
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DOI：
10.1890/07-1541.1
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发表时间：
2008-05-01
期刊：
影响因子：
4.8
通讯作者：
Lankau, Richard
中科院分区：
文献类型：
--
作者：
Lankau, Richard
植物种间非资源竞争机制的重要性已越来越被人们所认识，但对潜在竞争性状的遗传变异和进化变化如何影响种间共存却知之甚少。我发现黑芥子苷浓度的遗传变异，一个假定的化感作用剂在黑芥，影响三个异种的邻居物种的适合度，但不影响相邻的B。黑人个体投资sinigrin导致的负遗传相关的种内和种间竞争能力，这在许多代可以提供一个强大的稳定力量，保持物种和遗传多样性在这个系统中。
The importance of non-resource-based mechanisms of competition between plant species has been increasingly recognized, but little is known about how genetic variation and evolutionary changes in the underlying competitive traits might affect species coexistence. I found that genetic variation in sinigrin concentration, a putative allelopathic agent in Brassica nigra, affected the fitness of three heterospecific neighbor species but did not affect neighboring B. nigra individuals. Investment in sinigrin led to a negative genetic correlation between intra- and interspecific competitive ability, which over many generations could provide a strong stabilizing force maintaining both species and genetic diversity in this system.