News from IBE (CSIC-UPF)
The origins of metamorphosis and which genes determine when and how it takes place were determined studying two representative cases: the fly Drosophila melanogaster -one of the organisms most modified compared to the common ancestor, and which undergoes a complete metamorphosis- and the cockroach Blattella germanica -one of the most primitive organisms, which experiment an incomplete metamorphosis. This research, conducted by IBE researchers led by Xavier Bellés, has been published in the journal iScience.
Results show that in Blattella germanica the genes involved in metamorphosis are expressed mainly in the final stages of the larvae, whereas in Drosophila melanogaster they are express in the early and mid-embryo stages. Such differences may reflect the trends in the evolution of the development from cockroaches to flies. During this study, 22 messenger RNA libraries were produced and sequenced for the 11 developmental stages of the cockroach, and 193,014,748 sequences were read. This information is available for the scientific community. - Carlos Sierra / PRBB
G. Ylla, M.D. Piulachs y X. Bellés. (2018) Comparative transcriptomics in two extreme neopterans reveal general trends in the evolution of modern insects. iScience 4: 164–179. DOI: 10.1016/j.isci.2018.05.017
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