We assessed variation in mitochondrial DNA (mtDNA) by restriction fragment length polymorphism (RFLP) analysis and in nuclear genes by allozyme analysis among sympatric pairs of limnetic and benthic ecotypes of whitefish (Coregonus) coexisting in three lakes of southern Yukon to address three evolutionary questions regarding their origins. Are sympatric low and high gill-raker count ecotypes ge...

In order to investigate phylogenetic relationships of the Peronosporomycetes (Oomycetes), nuclear large subunit ribosomal DNA sequences containing the D1 and D2 region were analyzed of 92 species belonging to the orders Peronosporales, Pythiales, Leptomitales, Rhipidiales, Saprolegniales and Sclerosporales. The data were analyzed applying methods of neighbor-joining as well as maximum parsimony...

Nidoviruses and arenaviruses are the only known RNA viruses encoding a 3’-5’ exonuclease domain (ExoN). The proofreading activity of ExoN has played key role in growth nidoviral genomes, while this partakes suppression host innate immune signaling. Sequence structural homology analyses suggest that these proteins have been hijacked from cellular hosts many times. Analysis available sequences re...

Abstract Dorstenia, the second largest genus of Moraceae, comprises nine sections that are mainly found in Africa and America. Two them woody macrospermous, other seven herbaceous microspermous. There three Neotropics, all which taxonomically complex owing to their great morphological similarity. The most recent molecular phylogenetic studies Dorstenia suggested neotropical polyphyletic. These ...

Subgeneric groups have been circumscribed in Iris based on a small number of morphological characters. Recent DNA sequence data has indicated that several of the subgenera, sections, and series that have previously been delineated are paraphyletic or polyphyletic. The evolution of characters that have traditionally been used to distinguish sub generic and sectional groups within Iris was invest...

The genus Gephyraulus Rübsaamen (Diptera: Cecidomyiidae) is newly recorded on Fabaceae and in Japan. tokudai Elsayed n. sp. that develops the flower buds of Caesalpinia crista L. (Fabaceae) described here as new to science. A description, illustrations, ecological features species are given. In addition, a molecular phylogenetic analysis including species, G. zewaili lycantha, each from differe...