Clade-limited colonization in brood parasitic finches (Vidua spp.)
Clade-limited colonization in brood parasitic finches (Vidua spp.)
复制标题
DOI：
10.1080/10635150490265021
复制
发表时间：
2004-02-01
影响因子：
6.5
通讯作者：
Payne, RB
中科院分区：
文献类型：
--
作者：
Sorenson, MD;Balakrishnan, CN;Payne, RB
非洲寄生雀（Vidua spp.）是寄主专家，它们模仿寄主雀科（梅花科）的歌曲和雏鸟嘴部标记。尽管最近的分子分析表明，该群体的一些成员中快速物种形成与宿主转换相关，但不同 Vidua 谱系与特定宿主属的关联表明，宿主和寄生虫系统发育中存在更高水平的共物种形成的可能性。我们比较了所有 Vidua 物种的系统发育及其梅花雀宿主的系统发育，并比较了两组的分歧时间估计。 Vidulidae 现有成员之间和 Vidua 物种之间的基本差异分别比宿主属和物种之间的差异更晚，这使得共种模型在 Vidua 系统发育的大多数或所有级别上都被拒绝。尽管如此，一些共成测试表明宿主和寄生树拓扑之间存在显着的一致性。这个结果可能是分支限制定殖的产物。寄生雀的宿主转换通常涉及同一属或密切相关属的新宿主，这种效应增加了宿主和寄生树的明显一致性。
The African brood parasitic finches (Vidua spp.) are host specialists that mimic the songs and nestling mouth markings of their finch hosts (family Estrildidae). Although recent molecular analyses suggest rapid speciation associated with host switches in some members of this group, the association of different Vidua lineages with particular host genera suggests the possibility of cospeciation at higher levels in the host and parasite phylogenies. We compared a phylogeny of all Vidua species with a phylogeny of their estrildid finch hosts and compared divergence time estimates for the two groups. Basal divergences among extant members of the Vidulidae and among Vidua species are more recent than those among host genera and species, respectively, allowing a model of cospeciation to be rejected at most or all levels of the Vidua phylogeny. Nonetheless, some tests for cospeciation indicated significant congruence between host and parasite tree topologies. This result may be an artifact of clade-limited colonization. Host switches in parasitic finches have most often involved new hosts in the same or a closely related genus, an effect that increases the apparent congruence of host and parasites trees.