Associations between mycophagous Drosophila and their Howardula nematode parasites: a worldwide phylogenetic shuffle
Associations between mycophagous Drosophila and their Howardula nematode parasites: a worldwide phylogenetic shuffle
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食菌性果蝇与其霍华杜拉线虫寄生虫之间的关联：全球系统发育洗牌
DOI：
10.1046/j.1365-294x.2003.01721.x
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发表时间：
2002
影响因子：
4.9
通讯作者：
J. Jaenike
中科院分区：
文献类型：
--
作者：
S. Perlman;G. Spicer;D. D. Shoemaker;J. Jaenike
人们对进化时间尺度上水平传播寄生虫的宿主关联模式的决定因素知之甚少。我们研究了以蘑菇为食的果蝇（双翅目：果蝇科），特别是昆纳亚属和果蝇科物种组与其水平传播的霍瓦杜拉线虫寄生虫（垫刃目：Allantonematidae）之间关联的演变。 Howardula 物种是通过从野生捕获的苍蝇中收集的线虫的分子特征来鉴定的。此外，DNA 序列数据还用于推断宿主果蝇（mtDNA：COI、II、III）及其霍华德杜拉寄生虫（rDNA：18S、ITS1；mtDNA：COI）的系统发育关系。宿主和寄生虫的系统发育并不一致，宿主关联模式是由于频繁且有时是快速的宿主定植而产生的。果蝇寄生的 Howardula 并不是单系的，果蝇和远亲的食菌性球形果蝇之间发生了宿主转换。有证据表明寄生虫和宿主之间存在某些系统发育关联，某些线虫进化枝与某些宿主谱系相关。总体而言，这些寄主关联是高度动态的，并且似乎是由由于共享的繁殖地点和线虫的巨大潜在寄主范围而导致的寄主定殖的重复机会的组合驱动的。
Little is known about what determines patterns of host association of horizontally transmitted parasites over evolutionary timescales. We examine the evolution of associations between mushroom‐feeding Drosophila flies (Diptera: Drosophilidae), particularly in the quinaria and testacea species groups, and their horizontally transmitted Howardula nematode parasites (Tylenchida: Allantonematidae). Howardula species were identified by molecular characterization of nematodes collected from wild‐caught flies. In addition, DNA sequence data is used to infer the phylogenetic relationships of both host Drosophila (mtDNA: COI, II, III) and their Howardula parasites (rDNA: 18S, ITS1; mtDNA: COI). Host and parasite phylogenies are not congruent, with patterns of host association resulting from frequent and sometimes rapid host colonizations. Drosophila‐parasitic Howardula are not monophyletic, and host switches have occurred between Drosophila and distantly related mycophagous sphaerocerid flies. There is evidence for some phylogenetic association between parasites and hosts, with some nematode clades associated with certain host lineages. Overall, these host associations are highly dynamic, and appear to be driven by a combination of repeated opportunities for host colonization due to shared breeding sites and large potential host ranges of the nematodes.
DOI：
10.1073/pnas.95.17.9962
发表时间：
1998-08-18
影响因子：
11.1
作者：
Peek, AS;Feldman, RA;Vrijenhoek, RC
通讯作者：
Vrijenhoek, RC