Monophyly of the ring-forming group in Diplopoda(Myriapoda,Arthropoda) based on SSU and LSU ribosomal RNA sequences  

作　　者：Peiyun Cong Xuhua Xia Qun Yang 

机构地区：[1]State Key Laboratory of Palaeobiology and Strategraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences,Nanjing 210008, China [2]Yunnan Key Laboratory for Paleobiology, Yunnan University, Kunming 650091, China [3]Department of Biology, University of Ottawa, Ont., Canada KIN 6N5

出　　处：《Progress in Natural Science:Materials International》2009年第10期1297-1303,共7页自然科学进展·国际材料（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No 40572070)

摘　　要：Two controversies exist in the phylogeny of the derived millipedes(Diplopoda).The first is whether millipedes with a fusion ring,including Polydesmida,Spirobolida,Spirostreptida and Julida,form a monophyletic group(the ring-forming group).The second concerns the phylogenetic relationship within the three orders of Juliformia,i.e.Julida,Spirostreptida and Spirobolida.To resolve these phylogenetic controversies,we sequenced 18S and 28S rDNA from six millipede orders and retrieved several homologous sequences from GenBank.Our results give robust support to the monophyly of the ring-forming group based on maximum parsimony methods,max-imum likelihood methods and Bayesian inference.The monophyly of the ring-forming group suggests that the fusion of segment sclerites might have occurred only once during millipede evolutionary history.We also established a sister-group relationship between Spirobol-ida and Spirostreptida within Juliformia after eliminating a short-branch attraction phenomenon,which is consistent with that from the mitochondrial genome analysis.Two controversies exist in the phylogeny of the derived millipedes （Diplopoda）. The first is whether millipedes with a fusion ring, including Polydesmida, Spirobolida, Spirostreptida and Julida, form a monophyletic group （the ring-forming group）. The second concerns the phylogenetic relationship within the three orders of Juliformia, i.e. Julida, Spirostreptida and Spirobolida. To resolve these phylogenetic controversies, we sequenced 18S and 28S rDNA from six millipede orders and retrieved several homologous sequences from GenBank. Our results give robust support to the monophyly of the ring-forming group based on maximum parsimony methods, maximum likelihood methods and Bayesian inference. The monophyly of the ring-forming group suggests that the fusion of segment sclerites might have occurred only once during millipede evolutionary history. We also established a sister-group relationship between Spirobolida and Spirostreptida within Juliformia after eliminating a short-branch attraction phenomenon, which is consistent with that from the mitochondrial genome analysis.

关 键 词：DIPLOPODA Ring-forming group Ribosomal RNA MONOPHYLY Short-branch attraction 

分 类 号：Q965.8[生物学—昆虫学] S512.1[农业科学—作物学]