タイワンサンマンネングサゾク（ベンケイソウカ）ニオケルトクシュナヘイコウテキオウホウサンノハッケントソノセイリツヨウインノケンショウ

博士（学術)東京農工大

The complete chloroplast genome of a coastal plant, Euphorbia jolkinii (Euphorbiaceae)

The complete chloroplast genome sequence of a coastal plant, Euphorbia jolkinii Boiss. (Euphorbiaceae), was determined. The chloroplast genome was 162, 854 bp in length, consisting of a large single copy region (90, 726 bp), a small single copy region (18, 422 bp), and two inverted repeats (26, 853 bp). The chloroplast genome contained 115 genes, consisting of 80 unique protein-coding genes, 30 unique tRNA genes, four unique rRNA genes, and one pseudogene, rps16. GC content of the whole chloroplast genome was 35.6%. The phylogenetic analysis showed a close relationship between E. jolkinii and E. pekinensis Rupr. The sequence data would provide useful information to understand the evolutionary process of E. jolkinii

A Much Faster Algorithm for Finding a Maximum Clique

We present improvements to a branch-and-bound maximumclique-finding algorithm MCS (WALCOM 2010, LNCS 5942, pp. 191–203) that was shown to be fast. First, we employ an efficient approximation algorithm for finding a maximum clique. Second, we make use of appropriate sorting of vertices only near the root of the search tree. Third, we employ a lightened approximate coloring mainly near the leaves of the search tree. A new algorithm obtained from MCS with the above improvements is named MCT. It is shown that MCT is much faster than MCS by extensive computational experiments. In particular, MCT is shown to be faster than MCS for gen400 p0.9 75 and gen400 p0.9 65 by over 328,000 and 77,000 times, respectively

Phylogeography of Infraspecific Differentiation of Hydrangea serrata (Hydrangeaceae), a Widespread Shrub Species in the Japanese Archipelago

departmental bulletin pape

Superior Electrochemical Performance of a Ni-P/Si Negative Electrode for Li-ion Batteries in an Ionic Liquid Electrolyte

To achieve electrode performance with both high capacity and long cycle life, we investigated the effect of the anion structure in an ionic liquid electrolyte on the electrochemical performance of an annealed Ni-P/(etched Si) negative electrode for Li-ion batteries. The electrode maintained a discharge capacity of 1890 mA h g-1 after 250 cycles in bis(fluorosulfonyl)amide-based ionic liquid electrolyte, which was approximately three times higher than that in bis(trifluoromethanesulfonyl)amide-based electrolyte

Molecular Phylogenetic Analyses of Geographical and Ecological Speciation of Anaphalis margaritacea

departmental bulletin pape

Population Genetic Structure of a Bamboo Taxon, Pleioblastus Sect. Pleioblastus, in the Ryukyu Islands Formed by Geohistory and Human Activity

departmental bulletin pape

Phylogeography of Juniperus Species (Cupressaceae) with a Disjunct Distribution in the Island Areas of Japan

departmental bulletin pape

Molecular phylogeny and evolution of alcohol dehydrogenase (Adh) genes in legumes

BACKGROUND: Nuclear genes determine the vast range of phenotypes that are responsible for the adaptive abilities of organisms in nature. Nevertheless, the evolutionary processes that generate the structures and functions of nuclear genes are only now be coming understood. The aim of our study is to isolate the alcohol dehydrogenase (Adh) genes in two distantly related legumes, and use these sequences to examine the molecular evolutionary history of this nuclear gene. RESULTS: We isolated the expressed Adh genes from two species of legumes, Sophora flavescens Ait. and Wisteria floribunda DC., by a RT-PCR based approach and found a new Adh locus in addition to homologues of the Adh genes found previously in legumes. To examine the evolution of these genes, we compared the species and gene trees and found gene duplication of the Adh loci in the legumes occurred as an ancient event. CONCLUSION: This is the first report revealing that some legume species have at least two Adh gene loci belonging to separate clades. Phylogenetic analyses suggest that these genes resulted from relatively ancient duplication events