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Inbreeding depression does not increase in foreign environments: a field experimental study

机译：近亲繁殖的抑郁症在国外环境中不会增加：一项现场实验研究

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Early successional species often disperse to novel environments, and if they are selfing, this dispersal will frequently be carried out by inbred individuals. If inbred immigrants are less likely to successfully establish populations than outbred immigrants, dispersal will be less effective and mating system evolution will favour outcrossing. I performed a reciprocal transplant of inbred and outbred plants grown in native and foreign planting sites to test the hypothesis that inbred immigrants had lower fitness. Inbreeding within populations was estimated with allozyme loci to confirm that the populations were inbred. While inbred and outbred plants had significantly lower fitness in foreign habitats, inbreeding depression was of similar magnitude at native sites and foreign habitats. There was no significant difference between inbred and outbred plants at foreign sites of the native habitat. Populations appear to be highly selfing, yet there is an advantage to outcrossing in both the native environment and foreign environments. The implications of this advantage with respect to mating system evolution may depend on whether novel environments are occupied or unoccupied.
机译：早期演替物种通常散布到新环境中，如果它们自交，则这种散布通常由近交个体来进行。如果自交移民比自交移民成功建立种群的可能性较小，那么散布的效果将不那么好，交配系统的发展将有利于杂交。我对在本地和国外种植地点种植的近交和近交植物进行了对等移植，以检验近交移民适应性较低的假设。用同工酶基因座估计了种群内的近交，以确认种群是近交的。自交和近交植物在国外生境中的适应性显着降低，而在本地和外地生境中近交衰退的程度相似。在本地生境的异地的近交和近交植物之间没有显着差异。种群似乎具有很强的自交能力，但是在本机环境和外国环境中进行异源杂交都有一个优势。关于交配系统演进的这种优势的含义可能取决于新环境是被占用还是未被占用。

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