Lack of sequential radiation in a parasitoid of a host-associated aphid
Lack of sequential radiation in a parasitoid of a host-associated aphid
复制标题
DOI：
10.1111/j.1570-7458.2011.01118.x
复制
发表时间：
2011-05-01
影响因子：
1.9
通讯作者：
Medina, Raul F.
中科院分区：
文献类型：
--
作者：
Dickey, Aaron M.;Medina, Raul F.
当低营养级的新生物多样性“级联”到高营养级，产生进一步的生物多样性时，就会发生连续辐射。当pupelis通吃草食动物物种包括寄主植物专门人口，连续辐射可以测试其寄生虫和捕食者。我们测试的顺序辐射在Apheninus perpallidus Gahan（半翅目：Apheninidae），寄生蜂的黄色山核桃蚜虫，Monelliopsis pecanis Bissel（半翅目：Drepanosiphidae）。这种蚜虫已被证明包括至少两个遗传上不同的寄主树相关的人口，一个以山核桃，薄壳山核桃（Wangenh）。K. Koch（胡桃科），和一个喂养水山核桃，山核桃（Michx。f.）傻瓜我们发现，这种黄蜂由三个遗传上不同的人口与独特的分子表型，但这些人口不对应的寄主植物物种的起源。收集网站占20%的分子方差found.Sequential辐射可能是不太常见的蚜虫寄生蜂比其他寄生类群，因为它们的生物学的具体方面，即寄生的外部饲养主机，多化性，并学会了栖息地的偏好。
Sequential radiation occurs when novel biodiversity at low trophic levels 'cascades' up to high trophic levels generating further biodiversity. When putatively generalist herbivore species comprise host-plant specialized populations, sequential radiation can be tested for their parasites and predators. We tested for sequential radiation in Aphelinus perpallidus Gahan (Hymenoptera: Aphelinidae), a parasitoid wasp of the yellow pecan aphid, Monelliopsis pecanis Bissel (Hemiptera: Drepanosiphidae). This aphid has been shown to consist of at least two genetically distinct host-tree-associated populations, one feeding on pecan, Carya illinoinensis (Wangenh.) K. Koch (Juglandaceae), and one feeding on water hickory, Carya aquatica (Michx. f.) Nutt. We found that this wasp consists of three genetically distinct populations with unique molecular phenotypes, but these populations did not correspond to host-plant species of origin. Collecting site accounted for 20% of the molecular variance found. Sequential radiation may be less common in aphid parasitoids than in other parasitoid groups because of specific aspects of their biology, namely parasitization of externally feeding hosts, multivoltinism, and learned habitat preference.