Journal article
Rhinoceros beetle horn development reveals deep parallels with dung beetles
PLoS genetics, Vol.14(10), pp.e1007651-e1007651
10/2018
Handle:
https://hdl.handle.net/2376/114361
PMCID: PMC6171792
PMID: 30286074
Abstract
Beetle horns are attractive models for studying the evolution of novel traits, as they display diverse shapes, sizes, and numbers among closely related species within the family Scarabaeidae. Horns radiated prolifically and independently in two distant subfamilies of scarabs, the dung beetles (Scarabaeinae), and the rhinoceros beetles (Dynastinae). However, current knowledge of the mechanisms underlying horn diversification remains limited to a single genus of dung beetles, Onthophagus. Here we unveil 11 horn formation genes in a rhinoceros beetle, Trypoxylus dichotomus. These 11 genes are mostly categorized as larval head- and appendage-patterning genes that also are involved in Onthophagus horn formation, suggesting the same suite of genes was recruited in each lineage during horn evolution. Although our RNAi analyses reveal interesting differences in the functions of a few of these genes, the overwhelming conclusion is that both head and thoracic horns develop similarly in Trypoxylus and Onthophagus, originating in the same developmental regions and deploying similar portions of appendage patterning networks during their growth. Our findings highlight deep parallels in the development of rhinoceros and dung beetle horns, suggesting either that both horn types arose in the common ancestor of all scarabs, a surprising reconstruction of horn evolution that would mean the majority of scarab species (~35,000) actively repress horn growth, or that parallel origins of these extravagant structures resulted from repeated co-option of the same underlying developmental processes.
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Details
- Title
- Rhinoceros beetle horn development reveals deep parallels with dung beetles
- Creators
- Takahiro Ohde - Department of Basic Biology, School of Life Science, SOKENDAI (The Graduate University for Advanced Studies), Okazaki, JapanShinichi Morita - Division of Evolutionary Developmental Biology, National Institute for Basic Biology, Okazaki, JapanShuji Shigenobu - NIBB Core Research Facilities, National Institute for Basic Biology, Okazaki, JapanJunko Morita - Division of Evolutionary Developmental Biology, National Institute for Basic Biology, Okazaki, JapanTakeshi Mizutani - Division of Evolutionary Developmental Biology, National Institute for Basic Biology, Okazaki, JapanHiroki Gotoh - Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, JapanRobert A Zinna - Department of Entomology, Washington State University, Pullman, Washington, United states of AmericaMoe Nakata - Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, JapanYuta Ito - Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, JapanKenshi Wada - Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, JapanYasuhiro Kitano - Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, JapanKaren Yuzaki - Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, JapanKouhei Toga - Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, JapanMutsuki Mase - Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, JapanKoji Kadota - Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, JapanJema Rushe - Division of Biological Sciences, The University of Montana, Missoula, Montana, United states of AmericaLaura Corley Lavine - Department of Entomology, Washington State University, Pullman, Washington, United states of AmericaDouglas J Emlen - Division of Biological Sciences, The University of Montana, Missoula, Montana, United states of AmericaTeruyuki Niimi - Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
- Publication Details
- PLoS genetics, Vol.14(10), pp.e1007651-e1007651
- Academic Unit
- Entomology, Department of
- Publisher
- United States
- Identifiers
- 99900547620801842
- Language
- English
- Resource Type
- Journal article