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首页> 外文期刊>Parasitology >Cross-fertilization as a reproductive strategy in a tissue flukes Didymosulcus katsuwonicola (Platyhelmintes: Didymozoidae) inferred by genetic analysis
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Cross-fertilization as a reproductive strategy in a tissue flukes Didymosulcus katsuwonicola (Platyhelmintes: Didymozoidae) inferred by genetic analysis

机译:遗传分析推论交叉施肥作为一种组织吸虫的繁殖策略片假单胞菌(Pydymosulcus katsuwonicola)(Platyhelmintes:Didymozoidae)

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摘要

Mitochondrial DNA locus cytochrome oxidase I was used to asses intraspecific genetic diversity of a didymozoid species Didymosulcus katsuwonicola. Adult forms of this species live encapsulated in pairs in the gills of the reared Atlantic bluefin tuna (Thunnus thynnus). The life cycle of this food-borne parasites and its migration in the host tissues after releasing from the digestive tract to the definitive site in the gills are unknown. Our goal was to assess whether two encysted didymozoids share the same haplotype, indicative of a common maternal origin, as well as the extent of cross-in respect to self-fertilization strategy. Intraspecific comparison showed high haplotype diversity, while the presence of two matching haplotypes within a single cyst encompassed only 17% of sampled individuals. This infers that cross-fertilization between paired individuals within the cyst is more common mechanism than self-fertilization. Such hermaphroditic parasite's trait suggests the existence of intricate infection and reproduction mechanisms, presumably as an adaptation for successful fulfillment of their indirect life cycle through dissemination of genetically more diverse and consequently more fit offspring.
机译:线粒体DNA基因座细胞色素氧化酶I被用来评估双毛类物种Didymosulcus katsuwonicola的种内遗传多样性。该物种的成年形式成对生活在成对的大西洋蓝鳍金枪鱼(Thunnus thynnus)the中。这种食源性寄生虫的生命周期及其从消化道释放到to中最终部位后在宿主组织中的迁移是未知的。我们的目标是评估两个有节肢动物的类双体类是否共享相同的单倍型,这表明母亲是共同的起源,以及与自我受精策略的交叉程度。种内比较显示出较高的单倍型多样性,而单个囊肿中两种匹配单倍型的存在仅涵盖了17%的采样个体。这表明,囊肿内配对个体之间的交叉受精比自体受精更为普遍。这种雌雄同体寄生虫的特征表明存在复杂的感染和繁殖机制,大概是通过传播遗传上更多样化的,因此更适合的后代成功实现其间接生命周期的一种适应。

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