Molecular phylogeny of the Ceratosolen species pollinating Ficus of the subgenus Sycomorus sensu stricto:: Biogeographical history and origins of the species-specificity breakdown cases
Molecular phylogeny of the Ceratosolen species pollinating Ficus of the subgenus Sycomorus sensu stricto:: Biogeographical history and origins of the species-specificity breakdown cases
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DOI：
10.1006/mpev.1998.0590
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发表时间：
1999-04-01
影响因子：
4.1
通讯作者：
Rasplus, JY
中科院分区：
文献类型：
--
作者：
Kerdelhue, C;Le Clainche, I;Rasplus, JY
桑科（Moraceae）榕属（Sycomorus）亚属（Subgenus Sycomorus）的14种榕都是由角管榕属（Ceratosolen）植物传粉的。小蜂总科（Chalcidoidea），主要分布于非洲大陆、马达加斯加岛、马斯克林群岛和科摩罗群岛，但有1种分布于整个东方地区。图传粉者的关系通常是严格的物种特异性，但例外的“一对一”的规则发生在我们研究的组。为了了解Ceratosolen种与榕的Sycomorus亚属和特异性故障的情况下的起源的地理历史，我们已经使用细胞色素B序列重建的榕小蜂的系统发育。结果表明，来自马达加斯加地区的传粉者和来自非洲大陆的传粉者形成了两个不同的分支，这可能是由祖先种群穿越莫桑比克海峡后分歧的。东方黄蜂种类与非洲种类有很强的亲缘关系。这两个物种特异性例外是由于不同的进化事件。与F. sur可以解释为没有植物辐射的互惠伙伴的连续物种形成事件。相反，我们假设C. galili从一个未知的，可能已经灭绝的榕属物种水平转移到F，sycomorus后，这个本地马达加斯加无花果物种殖民非洲。(C)北京：科学出版社.
The 14 species of Ficus of the subgenus Sycomorus (Moraceae) are invariably pollinated by Ceratosolen species (Hym. Chalcidoidea), which in turn reproduce in the fig florets, They are distributed mostly in continental Africa, Madagascar, and the Mascarene and Comoro Islands, but 1 species extends its geographical range all over the Oriental region. Fig-pollinator relationships are usually strictly species specific, but exceptions to the 'one-to-one' rule occur within the group we studied. In order to understand both the biogeographical history of the Ceratosolen species associated with Ficus of the subgenus Sycomorus and the origins of the specificity breakdown cases, we have used cytochrome b sequences to reconstruct a phylogeny of the fig wasps. The results show that the pollinators from the Malagasy region and those from continental Africa form two distinct clades, which probably diverged after the crossing of the Mozambique Channel by an ancestral population. The Oriental wasp species show strong affinities with the African species. The two species-specificity exceptions are due to different evolutionary events. The occurrence of the two West African pollinators associated with F. sur can be explained by successive speciation events of the mutualistic partner without plant radiation. In contrast, we hypothesize that C. galili shifted by horizontal transfer from an unknown, presumably extinct, Ficus species to F, sycomorus after this native Malagasy fig species colonized Africa. (C) 1999 Academic Press.