基于蚁群算法的基因位点组合与眼压数据的相关性分析

设计了一种蚁群算法,用于进行基因多位点组合与连续型表型的关联分析。在欧洲生物信息学研究所发布的一项基因及眼压的数据集上,评估了本文设计方法的性能,实验结果表明,利用本文设计的蚁群算法能够发现与眼压显著相关的基因双位点组合,这为研究青光眼的发病机制提供了新的线索。另外,对于研究其他疾病的多位点组合和连续型表型的关联,本文设计的蚁群算法提供了一种新的思路。     

结瘤和非结瘤近等位基因品系大豆地上部生长性状

采用田间试验方法,以结瘤和非结瘤的近等位基因大豆品系为研究对象,研究了在当地常规施肥管理条件下结瘤和非结瘤品系大豆叶面积、亚表层栅栏细胞数和细胞大小的表现型。结果表明,结瘤品系大豆叶质量比非结瘤品系大,而叶面积却较低。各品种叶片亚表层栅栏组织细胞数也表现出与叶面积相同的规律,而细胞大小却表现为结瘤品系较非结瘤品系细胞大。说明结瘤品系叶面积较小是由于细胞数量减少所致,而不是由细胞大小引起的。图5,参7。     

Primary analysis of QTG contribution to heterosis in upland cotton

In this paper, we analyzed the contribution of pure DNA factors to heterosis using quantitative trait genes (QTG) in two randomly selected strains from a recombinant inbred line of Gossypium hirsutum. According to a set of QTL mapping results, combined with analysis of DNA recombinant fragment sources in the two strains and QTL association analysis with their field traits, we hypothesize a view of “dominance + overdominance + epistasis”. That is, additive and additive epistasis may be the genetic basis of heterosis, and dominance, overdominance and epistasis may be the modes of heterosis action. Based on the heterosis results of this study, we also suggest a molecular mechanism for heterosis, and explain, in detail, with two randomly selected strains as examples. The male and female parent-derived additive epistatic QTLs of upper half mean length in LG01 and LG03 produced a trait variance of 2.99–3.52 compared with the female parent-derived loci. The trait of bolls per plant was controlled by two pairs of additive epistatic QTLs in LG02 and LG07, which were derived from both female and male parents. The QTLs were reciprocally interacted and produced a trait variance of 0.86. An initial concept of “super-hybrid cotton” was raised according to the nature of additive effect, that is genetic stability.     

澳门散文发展史略

在澳门,人们一般认为,散文是仅仅次于诗歌的重要文体。澳门散文有其独特的品质和发展足迹。文章从澳门散文发展的三个时期、澳门散文的主要特征、澳门散文类型和重要作家作品、澳门女性散文等方面入手,勾勒澳门散文发展的历程。     

基于VPN的天然气置换实时汇总统计的实现

介绍了太原市煤气公司自动化站依托企业互联网接入平台,基于VPN虚拟专用网,实现了天然气置换工作中指挥部对每个置换区域置换工作进度的及时掌控。     

滨海新区职业教育为区域经济服务的实践研究

通过滨海新区职业教育现状分析,总结滨海新区职业教育在专业建设、校企合作等方面为区域经济服务的实践经验,提出滨海新区职业教育应该在工学结合政策优惠、中高职业教育联动、用人制度改革等方面进行先行先试,为滨海新区的开发开放提供更好的服务。     

植物代谢组学技术研究进展

 代谢组学对生物体或细胞中全部小分子代谢物进行定性、定量分析, 是继基因组学、蛋白组学之后又一门新兴的组学技术。植物代谢物在种类、含量、生理功能方面极具多样性, 因此植物代谢组学在代谢组学的研究中占据重要地位。植物代谢物是植物生理状态在代谢水平的反映, 从整体上研究植物代谢物的变化及其调控将为解析植物生长发育及其与环境因子的互作奠定基础。植物代谢组学已经被广泛的应用于代谢物积累模式及其遗传基础研究、代谢相关基因的鉴定及途径解析方面, 成为现代植物生物学研究中的热点领域之一。本文综述植物代谢组学分析技术的基本组成、发展状况及植物代谢组学应用于现代植物生物学研究的现状和趋势。     

世界马拉松项目竞争格局及特征对中国马拉松项目的启示

本文运用数理统计法、比较法等方法对世界马拉松项目的发展历史进行回顾,分析该项目的世界格局与发展趋势、格局特征及成因．研究表明：项目的地域分布特征明显,集团优势明显;提高我国马拉松水平,必须提高参赛能力,加大普及,形成集团优势的等方面努力．     

Starch RVA profile parameters of rice are mainly controlled byWx gene

Quantitative trait locus (QTLs) mapping for rapid visco analyser (RVA) profile parameters has been carried out by using a double haploid (DH) population derhred from a cross betweenindica variety Zhai-Ye-Qing 8 andjaponica variety Jing-Xi 17 and its genetic linkage map. The results indicate that the segregation of the RVA profiles is continually distributed among the DH lines, and some DH lines show transgressive segregation for all the parameters. A major QTL,Waxy (Wx) gene on chromosome 6 which controls the amylose synthesis, has been detected significantly for 5 traits: hot paste viscosity (HPV), cool paste viscosity (CPV), breakdown viscosity (BDV), consistency viscoslty (CSV) and setback viscoslty (SBV). Therefore, the RVA profile parameters are mainly controlled byWx gene. Other 3 and 2 QTLs have also been identified for BDV and SBV, respectively, and two of them share the same region on chromosomes 1 and 5. However, the peak viscosity (PKV) is controlled by a minor QTL on chromosome 12, qPKV-12.     

Effective strategy of the overwintering of semiaquatic bugs: overwintering of Velia caprai (Heteroptera: Gerromorpha: Veliidae)

Overwintering of Velia caprai was studied during the winter months 2006–2007 in the area of South Bohemia (Czech Republic) by (1) field phenological observations and samples, (2) study of artificially established experimental cohorts in an unheated glasshouse, and (3) auxiliary experiments in a laboratory. Velia caprai has a unique way of overwintering within the gerromorphan bugs that is rare among insects generally; it can overwinter in both an adult and an egg stage. Most females reach sexual maturity before overwintering, mate with mature males, overwinter actively on the water surface and lay eggs during the winter. The dormant eggs can be induced to hatch by increasing temperatures. Winter oviposition can be interpreted as a sign of a risk‐spreading reproductive strategy. The overwintering of both adults and eggs provides a chance to adapt to changes in the local environmental conditions and could be an important determinant in broad variability of life‐history traits.