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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

A molecular phylogeny of Oxya (Orthoptera: Acridoidea) in China inferred from partial cytochrome b gene sequences.

The grasshoppers of the genus Oxya are well known to damage rice, sugar cane, and other crops, yet their phylogenetic relationships have not been examined with molecular data. In this study, we obtained the 432 bp DNA sequences of the mitochondrial cytochrome b gene from 91 individuals of nine Oxya species and two outgroups (Gesonula punctifrons and Acrida cinerea). Phylogenetic analyses for the molecular data set were then carried out using the maximum parsimony and neighbor-joining methods. The results showed that the nine Oxya species form four well-supported clades, which include (1) O. intricata and O. flavefemura; (2) O. japonica and O. bicingula; (3) O. agavisa; and (4) O. chinensis, O. brachyptera, O. adentata, and O. hainanensis, respectively. In particular, the monophyly of O. hainanensis and O. agavisa is strongly supported, respectively. However, O. flavefemura and O. intricata, O. bicingula, and O. japonica form paraphyletic groups, respectively, and O. chinensis, O. adentata, and O. brachyptera form a polyphyletic group, suggesting that they should be merged as few as three species.[1]


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