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Host sex-specific parasites in a functionally dioecious fig: a preference way of adaptation to their hosts

文献类型： 外文期刊

作者： Wang, Qi 1 ; Jiang, Zi-Feng 3 ; Wang, Ning-xin 1 ; Niu, Li-ming 4 ; Li, Zi 5 ; Huang, Da-Wei 1 ;

作者机构： 1.Shandong Agr Univ, Coll Plant Protect, Tai An 271018, Shandong, Peoples R China

2.Shandong Acad Agr Sci, Cotton Res Ctr, Jinan 250100, Peoples R China

3.Univ Chicago, Inst Genom & Syst Biol, Chicago, IL 60615 USA

4.Trop Crops Genet Resources Inst, Danzhou 571737, Hainan, Peoples R China

5.Chinese Acad Sci, Inst Zool, Beijing 100101, Peoples R China

关键词： Coevolution; dioecy; DNA barcoding; host shift; nonpollinating fig wasp

期刊名称：ECOLOGY AND EVOLUTION （ 影响因子：2.912； 五年影响因子：3.271 ）

ISSN： 2045-7758

年卷期： 2013 年 3 卷 9 期

页码：

收录情况： SCI

摘要： Host-parasites interaction is a common phenomenon in nature. Diffusive coevolution might maintain stable cooperation in a fig-fig wasps system, in which the exploiter might diversify their genotype, phenotype, or behavior as a result of competition with pollinator, whereas the figs change flower syconia, fruits thickness, and syconia structure. In functionally dioecious Ficus auriculata, male figs and female figs contain two types of florets on separate plant, and share high similarities in outside morphology. Apocryptophagus (Sycophaginae, Chalcidoidea, Hymenoptera) is one of few groups of nonpollinating fig wasps that can reproduce within both male and female figs. On the basis of the morphology and DNA barcoding, evidence from partial sequences of mitochondrial cytochrome c oxidase I and nuclear internal transcribed spacer 2, we found that there are two nonsibling Apocryptophagus species living on male and female F. auriculata figs, respectively. We estimated that these two species diverged about 19.2 million years ago. Our study suggests that the host shift from Ficus variegate or Ficus prostrata fig species to male figs is a preference way for Apocryptophagus wasps to adapt to the separation of sexual function in diecious figs. Furthermore, to escape the disadvantage or sanction impact of the host, the exploiter Apocryptophagus wasps can preferably adapt to exploiting each sex of the figs, by changing their oviposition, niche shift, and habitat.

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