Symbiosis

, Volume 53, Issue 3, pp 131–137 | Cite as

Chromosome numbers are not fixed in Agaonidae (Hymenoptera: Chalcidoidea)

  • Qing Liu
  • Xiao hong Ou
  • Stephen G. Compton
  • Da rong Yang
Article

Abstract

Agaonidae (the pollinators of fig trees, Ficus spp., Moraceae) are a distinctive family of chalcid wasps with uncertain affinities within the Chalcidoidea. Chromosome numbers have only been described previously for one species (Blastophaga psenes, 2n = 12, the pollinator of F. carica, of subgenus Ficus). In this paper, we used a modified technique to analyze the karyology of three Ceratosolen species, Ceratosolen solmsi, C. graveli and C. emarginatus which are associated with figs of Ficus subgenus Sycomorus. Their karyotypes are 2n = 10. All the chromosomes are metacentric (NF = 20) with little difference in relative lengths, making them hard to distinguish. The variation in chromosome numbers that we have detected suggests that karyology can usefully complement molecular-based studies of the phylogeny of fig wasps.

Keywords

Ceratosolen Chromosomes Fig wasps Karyology 

Notes

Acknowledgements

This work was funded by the Chinese Natural Science Foundation (30970403, 30970439) and also supported by grants from the Key Laboratory of Forest Disaster Warning and Control Program of Southwest Forestry University (ZK10B302). We express our sincere gratitude to V.E. Gokhman (Botanical Garden, Moscow State University) and Wen-hui Nie (Kunming Institute of Zoology, Chinese Academy of Science) for their good suggestions on the experiment and Rodrigo A. S. Pereira for commenting on an earlier version of the manuscript. We thank Sun Fuping for his help on image processing. We also thank Cao Yong-qiang, Yang Pei, Li Zong-bo, Ma Wen-juan, Xi Yi-cui, Miao Bai-ge and Wang Gang for their assistance.

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Qing Liu
    • 1
    • 2
  • Xiao hong Ou
    • 3
  • Stephen G. Compton
    • 4
  • Da rong Yang
    • 1
    • 5
  1. 1.Key Laboratory of Tropical Forest Ecology, Xishuangbannan Tropical Botanical GardenChinese Academy of SciencesKunmingChina
  2. 2.Graduate University of Chinese Academy of SciencesBeijingChina
  3. 3.Key Laboratory of Forest Disaster Warning and ControlSouthwest Forestry UniversityKunmingChina
  4. 4.Faculty of Biological SciencesUniversity of LeedsLeedsUK
  5. 5.Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesKunmingPeople’s Republic of China

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