A Study on \u27Genomewide Selection\u27 for Maize (Zea mays L.) Breeding in Japanese Public Sectors : Single Nucleotide Polymorphisms Observed among Parental Inbred Lines

Recent rapid decrease of the cost for detecting single nucleotide polymorphisms (SNPs) has enabled maize (Zea mays L.) breeders in Japanese public sectors to introduce such molecular breeding techniques as \u27genomewide selection (GwS)\u27. It has been found in the previous simulation study by the authors that GwS can be a powerful tool to accelerate yield improvement if molecular markers can be arranged over the whole genome at intervals of 20 cM or shorter. The purpose of this study was to discover SNPs of maize parental inbred lines developed in Japanese public sectors to conduct GwS in the future. Here 38 individuals from 32 inbred lines, all but one of which had been developed in Japanese public sectors, were genotyped on up to 56110 SNP loci over the whole genome. The results (1) are thought reliable on the whole because they mostly accord with those having been obtained in the past studies and with the breeding records, (2) have shown that sufficient SNP markers can be arranged to conduct GwS, and (3) that some inbred lines have many and/or large unfixed genome regions, suggesting the necessity to revise the assumption having been made in the previous simulation study by the authors that the intra-inbred-line polymorphisms can be negligible.一塩基多型 (SNP) の検知に要する費用が近年大きく減少したことにより, 飼料用トウモロコシ (Zea mays L.) の育種を担当する日本の公的機関もゲノムワイドセレクション (GwS) の様な分子育種技術の導入が可能になりつつある。前報で著者らはコンピューター･シミュレーションを用い, 分子マーカーをゲノム全体に渡って20センチモルガン (cM) 以下の間隔で配置できれば, トウモロコシの収量性の改良を加速させる上でGwSが有効であることを示した。本研究の目的は, 将来におけるGwSの実施を視野に, 日本の公的機関で育成されたトウモロコシ自殖親系統群内におけるSNPの発見であった。この目的を達するため, 32自殖親系統 (うち31が日本の公的育種機関の育成) 38個体について, 最大56110SNP遺伝子座のジェノタイピングを試みたところ, 以下の結果を得た。(1) 将来のGwS実施に充分な数のSNPが発見された。(2) 得られた結果を基に描かれた系統樹が過去の育種記録や既往の知見とほぼ一致した。(3) その一方, 2個体をジェノタイピングした6自殖親系統の一部において多数または広大な未固定ゲノム領域が発見された。以上のことから, 本研究により得られた結果は高い信頼性を有する一方, 「自殖親系統内の多型は無視できるほど小さい」とした前報のシミュレーションにおける前提条件は, 実際のGwSにおいては見直す必要性があると考えられた

Selective dynamical imaging of interferometric data

Recent developments in very long baseline interferometry (VLBI) have made it possible for the Event Horizon Telescope (EHT) to resolve the innermost accretion flows of the largest supermassive black holes on the sky. The sparse nature of the EHT’s (u, v)-coverage presents a challenge when attempting to resolve highly time-variable sources. We demonstrate that the changing (u, v)-coverage of the EHT can contain regions of time over the course of a single observation that facilitate dynamical imaging. These optimal time regions typically have projected baseline distributions that are approximately angularly isotropic and radially homogeneous. We derive a metric of coverage quality based on baseline isotropy and density that is capable of ranking array configurations by their ability to produce accurate dynamical reconstructions. We compare this metric to existing metrics in the literature and investigate their utility by performing dynamical reconstructions on synthetic data from simulated EHT observations of sources with simple orbital variability. We then use these results to make recommendations for imaging the 2017 EHT Sgr A* data sethttp://iopscience.iop.org/2041-8205Physic

都市ごみ炭化物中塩素の水溶性に関する研究

第12回衛生工学シンポジウム（平成16年11月4日（木）-5日（金） 北海道大学クラーク会館） . 一般セッション . 5 廃棄物処理とリサイクル . P5-

肝臓の重粒子線治療が局所肝機能に及ぼす影響に関する検討

日本放射線腫瘍学会第17回学術大

Study on the Coating Film of Oxidative Polymerization of Urushiol with Copper(Ⅱ) -Amine Complexes as Catalyst

用红外光谱法研究了Cu(Ⅱ)-胺配合物催化生漆漆酚的氧化聚合过程,考察了生漆漆酚成膜性能、涂膜的热稳定性和耐化学介质性能。结果表明,Cu(Ⅱ)-胺配合物催化生漆漆酚氧化聚合过程具有类似漆酶的催化反应特征,它能够催化生漆漆酚氧化聚合干燥成膜,所得的涂膜具有与天然生漆涂膜相似的硬度、附着力、抗冲击力、热稳定性以及耐化学介质性能。Abstract :The oxidative polyme rization process of urushio l wi th copper(Ⅱ) – amine complex es as cataly st were studied by IR , and the properties of coating film w ere determined. The experimental result s show ed as fo llow s :in the catalyst reaction there w ere similarit ies between copper(Ⅱ) – amine complexes and o riginal laccase , the coat ing film w as manufactured by o xidat ive po lymerizat ion wi th copper(Ⅱ) – amine complexes as cataly st , and it had good proper ties w hich we re comparable to natural urushio l co ating fi lm , such as hardness , adhesion , impact resistance , heat stability and anticorro sive to chemicals.广西教育厅资助项目(自筹);广西民族学院重点资助项目(2003年