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Molecular Phylogeny Revealing the Single Origin of Cinnamomum-associated Bruggmanniella (Diptera: Cecidomyiidae) in Asia, with Descriptions of Three New and One Newly Recorded Species from Taiwan.

ABSTRACT: Cecidomyiid genus Bruggmanniella contains four Lauraceae-associated species in Asia and 13 species associated with various plant families in Latin American. In this article, three new species, B. sanlianensis sp. nov., B. turoguei sp. nov. and B. shianguei sp. nov., and one newly recorded species, B. cinnamomi, are reported on Cinnamomum plant species (Lauraceae) from Taiwan. Molecular phylogenetic analysis was conducted for the four Cinnamomum-associated Bruggmanniella, together with B. brevipes Lin, Yang and Tokuda, B. actinodaphnes Tokuda and Yukawa, three Pseudasphondylia and two Daphnephila species. The Asian Bruggmanniella and the Cinnamomum-associated Bruggmanniella were monophyletic on the Neighbor-joining, Maximum-likelihood, and Bayesian inference trees. In addition, Cinnamomum-associated Bruggmanniella species had the closest sistership with B. brevipes, which are associated with the plant genus Neolitsea (Lauraceae). These results suggest that B. brevipes, B. actinodaphnes and B. cinnamomi are members of genus Bruggmanniella, a finding that is not consistent with another recent morphology-based phylogenetic study. Among the Cinnamomum-associated lineages, the leaf galler B. sanlianensis sp. nov. is a sister to the clade of stem gallers, suggesting that host organ shift from leaf to stem occurred prior to host shift. Additionally, the paraphyly of the Taiwanese stem galler with respect to Japanese B. cinnamomi suggests that the distributional range of B. cinnamomi be expanded from Taiwan to Japan.

SUBMITTER: Lin SF

PROVIDER: S-EPMC8181171 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:The Hessian fly, Mayetiola destructor Say (Diptera, Cecidomyiidae), is a pest of wheat and belongs to a group of gall-inducing herbivores. This species has a unique life history and several ecological features that differentiate it from other Diptera such as Drosophila melanogaster and blood-feeding mosquitoes. These features include a short, non-feeding adult life stage (1-2 days) and the use of a long-range sex pheromone produced and released by adult females. Sex pheromones are detected by members of the odorant receptor (OR) family within the Lepidoptera, but no receptors for similar long-range sex pheromones have been characterized from the Diptera. Previously, 122 OR genes have been annotated from the Hessian fly genome, with many of them showing sex-biased expression in the antennae. Here we have expressed, in HEK293 cells, five MdesORs that display male-biased expression in antennae, and we have identified MdesOR115 as a Hessian fly sex pheromone receptor. MdesOR115 responds primarily to the sex pheromone component (2S,8E,10E)-8,10-tridecadien-2-yl acetate, and secondarily to the corresponding Z,E-isomer. Certain sensory neuron membrane proteins (i.e., SNMP1) are important for responses of pheromone receptors in flies and moths. The Hessian fly genome is unusual in that it encodes six SNMP1 paralogs, of which five are expressed in antennae. We co-expressed each of the five antennal SNMP1 paralogs together with each of the five candidate sex pheromone receptors from the Hessian fly and found that they do not influence the response of MdesOR115, nor do they confer responsiveness in any of the non-responsive ORs to any of the sex pheromone components identified to date in the Hessian fly. Using Western blots, we detected protein expression of MdesOrco, all MdesSNMPs, and all MdesORs except for MdesOR113, potentially explaining the lack of response from this OR. In conclusion, we report the first functional characterization of an OR from the Cecidomyiidae, extending the role of ORs as long-range sex pheromone detectors from the Lepidoptera into the Diptera.

Dataset Information

Molecular Phylogeny Revealing the Single Origin of Cinnamomum-associated Bruggmanniella (Diptera: Cecidomyiidae) in Asia, with Descriptions of Three New and One Newly Recorded Species from Taiwan.

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