在植物交配系统的进化过程中，多年的生活史〈动〉<动>和人口优势可能起着相互矛盾的作用
Perennial life-histories and demographic advantages may play contradictory roles in the evolution of plant mating systems
摘要：
在预测自花受精种群中反复出现的有害突变的命运和后果时，大多数模型都假设种群具有离散的非重叠世代。这使得它们在考虑具有重叠世代的多年生物种以及交配独立于年龄组发生时在生物学上无关。以前的模型研究多年生生活史〈动〉<动>的遗传特性的人口中存在的自花受精的影响，这样做考虑年龄相关的选择，并发现，与经验观察，多年生种群应表现出较低水平的近交衰退。在这里，我们提出了一个简单的确定性模型在连续时间选择在不同的健身性状和反馈之间的人口健身和大小。我们发现，一个常年的生活史可以导致高水平的近亲繁殖抑郁症，尽管近亲繁殖，由于杂合个体在成年阶段的频率较高。我们还提出，可能有人口优势的自我受精是独立的生殖成功。
英文摘要：
When predicting the fate and consequences of recurring deleterious mutations in self-fertilising populations most models developed make the assumption that populations have discrete non-overlapping generations. This makes them biologically irrelevant when considering perennial species with over-lapping generations and where mating occurs independently of the age group. Previous models studying the effect of perennial life-histories on the genetic properties of populations in the presence of self-fertilisation have done so considering age-dependent selection and have found that, contrary to empirical observations, perennial populations should exhibit lower levels of inbreeding depression. Here we propose a simple deterministic model in continuous time with selection at different fitness traits and feedback between population fitness and size. We find that a perennial life-history can result in high levels of inbreeding depression in spite of inbreeding, due to higher frequencies of heterozygous individuals at the adult stage. We also propose that there may be demographic advantages for self-fertilisation that are independent of reproductive success.
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