10.5061/DRYAD.J59JF
Tian, Enwei
Chinese Academy of Sciences
Nason, John D.
Iowa State University
Zheng, Linna
Chinese Academy of Sciences
Yu, Hui
Chinese Academy of Sciences
Kjellberg, Finn
École Pratique des Hautes Études
Machado, Carlos A.
University of Maryland, College Park
Data from: Lack of genetic isolation by distance, similar genetic
structuring but different demographic histories in a fig-pollinating wasp
mutualism
Dryad
dataset
2015
Ficus hirta
Valisia javana
2015-10-29T19:37:49Z
2015-10-29T19:37:49Z
en
https://doi.org/10.1111/mec.13438
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Historical abiotic factors such as climatic oscillations and extreme
climatic events as well as biotic factors have shaped the structuring of
species’ genetic diversity. In obligate species-specific mutualisms, the
biogeographic histories of the interacting species are tightly linked.
This could be particularly true for nuclear genes in the Ficus-pollinating
wasp mutualistic association as the insects disperse pollen from their
natal tree. In this study we compare spatial genetic structure of plant
and pollinator for the Ficus hirta-Valisia javana association throughout
South-East China including Hainan Island, for both nuclear and cytoplasmic
markers. We show that dispersal of the insect leads to plant and insect
presenting similar signatures of lack of genetic isolation by distance for
nuclear genes on the continent over a distance of 1000 km. But we also
show that the demographic histories of plant and insect are strikingly
different. This is in agreement with extreme climatic events leading to
transient regional extinctions of the insects, associated with local
survival of the plants. We also evidence genetic differentiation for both
wasps and fig-tree between the continent and Hainan Island, although the
Qiongzhou Strait is only on average 30 km wide suggesting that geographic
isolation by itself has not been sufficient to generate this
differentiation. Hence, our results suggest that in highly dispersive
mutualistic systems, isolation by dispersal limitation across a geographic
barrier could be supplemented by isolation by adaptation, and maybe by
coevolution, allowing further genetic divergence. In such systems, species
may frequently be composed of a single population.
Data accessibility-for SSR and mtDNA dataMicrosatellite genotype data and
mtDNA sequences for all individuals of V. javana.
South China