Journal article

Variation in sex ratio of the leafminer Phytomyza plantaginis Goureau (Diptera: Agromyzidae) from Australia

Marianne P Coquilleau, Xuefen Xu, Peter M Ridland, Paul A Umina, Ary A Hoffmann



Parthenogenetic reproduction has only previously been demonstrated in two species of agromyzid leafminer flies (Diptera: Agromyzidae), both from the genus Phytomyza. The plantain leafminer, Phytomyza plantaginis, is Palaearctic in origin, and bisexual populations have been observed in this region. However, historically, only females had been collected in the Australasian, Nearctic, Neotropical and Oceanian regions. Here, we show that southern Australian samples of this species from Plantago spp. can be composed of both parthenogenic and bisexual populations. In sites around Melbourne, males were present, although the sex ratio was female biased, with females comprising 75% of sampled individ..

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Awarded by RD&E program for control, eradication and preparedness for vegetable leafminer - Hort Innovation

Awarded by Australian Research Council

Funding Acknowledgements

We are very grateful for the technical expertise of Mallik Malipatil (Agriculture Victoria Research, Bundoora, Vic.) who performed male genitalia dissections and confirmed the identification of P. plantaginis. We thank Neal Evenhuis (Bishop Museum, Hawaii) for his detailed advice on the nomenclatural status of P. plantaginis, and we are particularly grateful to Michael von Tschirnhaus for his detailed review of the manuscript. We thank Qiong Yang, Nancy Endersby and Alex Gill for technical advice and assistance and Veronique Paris for preparing Figure 3. The culture of Pl. lanceolata was made possible due to the generous donation of seeds by Rachel Burton (University of Adelaide). This project was supported by the RD&E program for control, eradication and preparedness for vegetable leafminer (MT16004), funded by Hort Innovation, as well as the Australian Research Council (DP120100916). The development of this manuscript was supported by a Writing-up Award from the University of Melbourne to M. P. C.