Parasitism and the Maintenance of Genetic Variation

9629849 热闹 在遗传多样性的人群中，寄生虫可能会优先攻击最常见的遗传类型。 因此，植物和动物的异花受精可能会产生具有罕见基因型的后代，这被称为红皇后假说。 该项目的目的是检验红皇后假说的一个重要预测，即最近常见的宿主克隆优先受到寄生虫的攻击，因此它们在种群中的比例已经减少。 将研究淡水蜗牛自然克隆种群的长期动态，并研究克隆动态，克隆动态将与宿主克隆特异性感染率有关。 这些结果对于了解对害虫和病原体的易感性和抗性以及这些寄生虫如何引起宿主种群的遗传变化非常重要。

9629849 Lively In a genetically diverse population, parasites may preferentially attack the most common genetic type. Thus, cross fertilization in plants and animals may have the benefit of producing offspring with rare genotypes, which is called the Red Queen hypothesis. The objective of this project is to test a critical prediction of the Red Queen hypothesis, that host clones that were common in the recent past are preferentially attacked by parasites, and hence their proportion in the population has been reduced. The long-term dynamics of a natural, clonal population of freshwater snails will be studied, and the clone dynamics will be studied, and the clone dynamics will be related to host clone-specific rates of infection. The results will be important for understanding susceptibility and resistance to pests and pathogens, and how such parasites cause genetic changes in the host population.