Additive genetic variation in resistance traits of an exotic pine species: little evidence for constraints on evolution of resistance against native herbivores

摘要: The apparent failure of invasions by alien pines in Europe has been explained the co-occurrence native pine congeners supporting herbivores that might easily recognize new plants as hosts. Previous studies have reported exotic show reduced tolerance and capacity to induce resistance those herbivores. We hypothesize limited genetic variation existence evolutionary trade-offs between growth could represent additional potential constraints on evolution invasiveness outside their natural range. In this paper, we examined for constitutive induced chemical defences (measured non-volatile resin stem total phenolics needles) two major generalist cafeteria bioassays (the phloem-feeder Hylobius abietis defoliator Thaumetopoea pityocampa) using half-sib families drawn from a sample population Pinus radiata introduced Spain mid-19th century. found (i) significant variation, with moderate-to-high narrow-sense heritabilities both production phenolics, against T. pityocampa bioassays, (ii) no plant traits or different quantitative (iii) positive correlation studied Overall, results our study indicate P. its range, suggesting that, at least terms interactions these enemies, species become invasive future.