Analysis on Combining Ability for Characters of Male Sterile Lines in Rapeseed(Brassica napus L.)

The male sterile line is very important in the hybrid breeding program of rapeseed. This study was conducted to evaluate the combining ability of many characters of male sterile lines in Brassica napus L. Ten recessive genetic male sterile （RGMS） lines were used as parents to produce 45 single cross hybrids by using a half diallel cross method. These 45 crosses and their 10 parents were evaluated at Guiyang during 2007-2008. The results showed that both general combining ability （GCA） and specific combiing ability （SCA） effects were important for all characters, but additive gene effects were more predominant than non-additive gene effects. Qianyou 8AB and You 2894AB gave respective highly significant GCA effects of 230.94 and 127.65 kg-hm-2 for seed yield. Lines You 2894AB, QH303-4AB, You 157AB and You 2341AB gave highly significant GCA effects for oil content of 0.99, 1.62, 1.20 and 1.53%, respectively. The crosses among lines Qianyou 3AxQianyou 8B, Qianyou 8AxYou 2894B, You 2894AxQianyou 6B, Qianyou 8AxQH303-4B and Qianyou 8Ax Qianyou 6B gave high SCA effects of 616.29, 398.71,356.48, 394.24 and 303.79 kg hm-2 for seed yield, respectively. All these crosses also gave high seed yield indicating that these crosses could be used in the breeding program.

Analysis on Characters and Application Potential of a Sorghum Sterile Line ‘Ji2055A’

＇ Ji2055A＇ is a superior sterile line sorghum bred by Institute of Crop Resources, Jilin Academy of Agricultural Sciences. It has a growing season of 112 days and a plant height of 70 cm. With a stable sterility rate of 100%, ＇ Ji2055A＇ has a stable male sterility and highly viable stignms. Selfing won＇t lead to seeds, This sterile line is strongly resistant to drought and lodging in addition to resistance to leaf spot and head smut. Generally, it has a yield of 3 000 -4 000 kg/hm2 and the hybrid seed yield is between 4 000 - 5 000 kg/hm2, with a high combining ability. There are six varieties approved by the state and the province, as well as another eight new combines under regional testing. The obtained hybrids are strongly resistant, widely adaptable with a great potential to increase yield, ＇ Ji2055A＇ has promoted the breeding and production of spring early maturing sorghum in China.

Encryption Algorithm with Linear Equations

In this study,it is aimed to develop an encryption algorithm by finding a third point based on the line equation and the two points taken on it.In the literature review,a method was found to find the third point based on the two points given on the elliptic curves y2=x3+a·x+b,where a and b are real numbers.However,it has not been found adapted to the correct equation.In this study,it is proved that this method,which is primarily used in elliptic curves,is provided in line equations that intersect both axes.Then,using this method,an encryption algorithm has been made by connecting the points where the axes are cut to ASCII Character Codes and finding the third point.Thanks to the algorithm,an encryption consisting of two numbers was made for these binary characters by taking binary characters for each character of a secret text.This algorithm has some differences from other algorithms.The first of these is that normal encryption algorithms generate a separate password for each character,while a password is created for two characters in the algorithm.The second difference is that a character can be encoded in infinitely different ways due to the formation of the algorithm.When the software of this algorithm is made,it can be used in every field where Elliptic Curve Algorithm is used.In addition,instead of finding only a third point in encryption with the correct equation,studies can be done to create different algorithms by finding a different number of third points.

基于AutoCAD的大比例尺数字化地形图缩编方法探讨

大比例尺数字化地形图在城镇建设中起着重要的作用,而传统地形图缩编技术效率较低。本文以泰宁县1∶500数字化地形图缩编1∶2000地形图为例,充分利用AutoCAD平台的二次开发和共同特征选取功能,采用半自动和手动相结合的方法,大大提高了缩编效率,为大比例尺地形图缩编提供了一种新的思路。

Studies on Breeding and Application of Thermo-sensitive Genie Male Sterile Line 402S in Brassica napus Ⅰ. Hie Breeding Procedure and Character of 402S

A new rapeseed TGMS line 402S has bren bred through six years with seven generationsby hybridization and systematic breeding. 402S possesses the similar thermo-sensityve male sterility to its femal parent Xiangyou 91S which performed fertile, partially sterile and sterile throughout the flowering stage, and resembles its male parent Zhongshuang 4 on agronomic traits. And 402S has thedouble- low (low erucic acid and low glucosinolate) quality like its original parents.

Analysis of QTLs for Flag Leaf Shape and Its Response to Elevated CO_2 in Rice(Oryza sativa)

To understand the responses of flag leaf shape in rice to elevated CO2 environment and their genetic characteristics, quantitative trait loci （QTLs） for flag leaf shape in rice were mapped onto the molecular marker linkage map of chromosome segment substitution lines （CSSLs） derived from a cross between a japonica variety Asominori and an indica variety IR24 under free air carbon dioxide enrichment （FACE, 200 μmol/mol above current levels） and current CO2 concentration （Ambient, about 370 μmol/mol）. Three flag-leaf traits, flag-leaf length （LL）, width （LW） and the ratio of LL to LW （RLW）, were estimated for each CSSL and their parental varieties. The differences in LL, LW and RLW between parents and in LL and LW within IR24 between FACE and Ambient were significant at 1% level. The continuous distributions and transgressive segregations of LL, LW and RLW were also observed in CSSL population, showing that the three traits were quantitatively inherited under both FACE and Ambient. A total of 16 QTLs for the three traits were detected on chromosomes 1, 2, 3, 4, 6, 8 and 11 with LOD （Log10-1ikelihood ratio） scores ranging from 3.0 to 6.7. Among them, four QTLs （qLL-6＊, qLL-8＊ qLW-4＊ and qRLW-6＊） were commonly detected under both FACE and Ambient. Therefore, based on the different responses to elevated CO2 in comparison with current CO2 level, it can be suggested that the expressions of several QTLs associated with flag-leaf shape in rice could be induced by the high CO2 level.

Association between the related characters of hemispatial neglect and prognosis in stroke patients

OBJECTIVE： To recognize the significances of the classification, evaluation, treatment, pathogenesis, etiological factors and related loci of hemispatial neglect （HSN） in the treatment and prognosis of stroke patients. DATA SOURCES： Articles related to HSN in stroke published in English from January 1985 to December 2002 were searched in Medline database by using the keywords of ＂stroke, hemispatial neglect （HSN）, rehabilitation＂. Chinese relevant professional works and articles were also referred to. STUDY SELECTION： The data were primarily checked. Inclusive criteria： ① articles about the HSN symptoms in stroke; ② articles about the classification, evaluation, treatment, pathogenesis, etiological factors and related loci of HSN, as well as the treatment and prognosis of stroke. The repetitive studies or reviews were excluded. DATA EXTRACTION ： Totally 474 articles related to HSN in stroke were collected, 43 of them were involved and 431 repetitive studies or reviews were excluded. DATA SYNTHESES： HSN can be classified as sensory neglect and motor neglect. Because HSN is caused by the injury of network structure which mediated directed attention, it is generally believed that the inferior parietal Iobule of dominant hemisphere is the most closely correlated with neglect. The main theories related to the pathogenesis of HSN at present include ＂internal instruction＂, ＂directed bradykinesia＂, ＂sensory attention＂, etc. The main clinical manifestations are setover in drawing lines, picture drawing towards one side, imitation towards one side, picture description towards one side, etc., which can be evaluated by the line bisection test, target cancellation test, picture drawing test and pegboard test. The most important thing for the treatment is to make the patients continuously concentrate on the neglected side. CONCLUSION： HSN is an indicator for the bad outcome of cerebrovascular disease, the symptoms take longer time to rehabilitate with slow recovery, but quite a few HSN patients will get good prognosis if timely treatment and proper program are given.

Preprocessing Model of Manuscripts in Javanese Characters

Manuscript preprocessing is the earliest stage in transliteration process of manuscripts in Javanese scripts. Manuscript preprocessing stage is aimed to produce images of letters which form the manuscripts to be processed further in manuscript transliteration system. There are four main steps in manuscript preprocessing, which are manuscript binarization, noise reduction, line segmentation, and character segmentation for every line image produced by line segmentation. The result of the test on parts of PB.A57 manuscript which contains 291 character images, with 95% level of confidence concluded that the success percentage of preprocessing in producing Javanese character images ranged 85.9% - 94.82%.

Offline Arabic character recognition system

Several languages use the Arabic alphabets and Arabic scripts present challenges because the letter shape is context sensitive. For the past three decades, there has been a mounting interest among researchers in this problem. In this paper we present an Arabic Character Recognition system and review the theory behind the Arabic recognition system, the characteristics of Arabic writing, the sequence steps of recognizing Arabic text. These steps are separately discussed, and previous research work on each step is reviewed. Also in this paper we give some samples of Arabic fonts.

Data Pre－processing and Stroke Segment Extraction for On－line Handwritten Chinese Character Recognition

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AutoCAD R14中有关字符的处理方法和技巧

本文主要介绍了 Auto CAD R14中有关字符、特殊线型和符号的处理方法 ,以及绘制高质量

一种在AutoCAD中调用矢量汉字的新方法

介绍一种由ＡｕｔｏＣＡＤ的开发系统ＡＤＳ调用矢量汉字库的方法，同时对当前流行的矢量汉字库的结构作了分析．

基于GT双标图对小麦新品系的分类评价

为了从产量、品质方面准确评价旱肥地试验小麦新品系,以2020—2021年连续2年参加国家黄淮冬麦区旱地组多点比较试验的26份新品系为材料,应用多元统计方法分析了大田条件下2年间产量和品质性状的变化。结果表明:26份品系的产量和品质性状2年变异系数分别为2.0%~74.2%和2.1%~95.1%,变异较大,变异系数大小顺序依次为稳定时间>湿面筋含量>蛋白质含量>吸水率=单位面积产量>容重;相关分析表明,2年产量与品质性状存在负相关关系,稳定时间均与蛋白质含量、吸水量正相关,稳定时间与产量负相关,其中稳定时间与蛋白质含量相关系数均较高。在相关分析的基础上,采用聚类分析方法将2年中26份小麦参试品系聚为4类,并在主成分品种、性状(genotype by trait,GT)双标图(biplot)和聚类图中进行展示,聚类结果与新品系的实际表现一致,其中‘泰科麦4835’‘洛旱35’‘农大162’‘山农611436’连续2年划为同一类型,表现为产量较高、品质优良。该研究结果可为参试新品系的合理评价和推广应用提供理论依据。

问题导向的“钢结构设计原理”课堂理论教学改革

“钢结构设计原理”是道路桥路与渡河工程专业的核心专业课程,扎实提升课堂理论教学效率和效果是该课程教学改革的重要任务和目标。细致分析“钢结构设计原理”的课程内容特点以及由此导致学生学习过程中存在的问题,有针对性地提出从多层次网格模块化教学内容、建立“思维主线”、引入真实工程案例、坚持精确理论推导与定性分析相结合、开展课程横向比较等方面开展课堂理论教学改革,进而从根本上提升课堂理论教学的效率与效果。

辣椒(甜椒)雄性不育系13733A、1592A、1442A的特征与形态解剖

1995年在辣椒田中发现雄性不育株 ,用不同果型的品种 ,分别进行测交 ,连续回交和父本株自交 ,育成了灯笼型、羊角型、牛角型等不同类型的 3个雄性不育系和相应的保持系。不育系的长势、株幅、分枝明显强于可育株。各不育系的雌蕊功能正常 ,花药瘦小 ,干瘪 ,个别花药虽与保持系相似 ,但无粉粒或极少。

转bar基因水稻恢复系的生理性状和农艺性状

通过杂交将转bar基因水稻亲本 (Gulfmont、BengalHu -10和CypressPB -6)中的bar基因转移到恢复系测 64、明恢 63和特青中 ,培育出 6个抗除草剂 (Liberty)的同型恢复系测 64 -B(G)、测 64 -B(C)、特青 -B(B)、特青 -B(C)、明恢 63 -B(G)和明恢 63 -B(C)。抗除草剂同型恢复系的大部分生理性状和主要农艺性状与原恢复系接近。将同型恢复系与不育系杂交 ,选配出 8个抗除草剂三系杂交组合和 2个抗除草剂两系杂交组合 ,抗除草剂组合能保持或略高于原组合的产量水平。

利用SRAP分子标记评价小麦三雌蕊近等基因系的遗传背景

普通小麦三雌蕊突变体(TP)具有明显的穗粒数优势,为评估该突变体在育种中的利用价值,进行了近等基因系培育。以三雌蕊突变体(TP)为供体,单雌蕊中国春、川麦28、绵阳29、内麦9号为轮回亲本,经7代回交和4代自交,初步培育出三雌蕊近等基因系CSTP、CM28TP、MY29TP和NM9TP。利用128对SRAP引物对培育的近等基因系及轮回亲本进行遗传分析,结果表明:(1)128对引物共扩增出978条谱带。其中有120对引物的扩增产物具有多态性,占所用引物的93.8%。这120对引物共扩增出638个差异谱带,占总谱带数的65.2%;(2)利用128对SRAP引物计算9个材料之间的遗传相似系数。其中中国春与CSTP的相似系数为0.9346,绵阳29与MY29TP的遗传相似系数为0.9070,川麦28与CM28TP的遗传相似系数为0.9397,内麦9号与NM9TP的遗传相似系数为0.8732;(3)通过聚类分析筛选出2对遗传相似性大于0.93的近等基因系,即CM28TP与川麦28、CSTP与中国春。

K、T、V、CHA型杂种小麦品质性状的细胞质效应

采用 2个母本基因型、4种细胞质类型的两因素实验设计 ,对T、K、V、CHA型杂种小麦的品质性状表现及其差异进行了比较研究。结果表明 ,K、V、T型细胞质对杂种小麦某些品质性状具有正向效应 ,其中K型细胞质效应较大 ,其杂种的千粒重、面粉白度、蛋白质含量、湿面筋含量、面筋指数、沉淀值、降落值、面团形成时间、稳定时间和评价值均表现正向杂种优势 ,超MP 2 .0 8%～ 16 .82 % ,与V、T、CHA型相比有多个性状优势的差异达到显著水平 ;容重和吸水率的杂种优势在细胞质间差异不显著 ,无细胞质优势效应 ;母本基因型与细胞质具有交互作用 ,对杂种F1 代的性状表现具有一定影响。杂种F1 的容重和评价值的互作值较大 ,分别为 2～ 34g·L- 1 和 2～ 2 8,蛋白质含量和稳定时间的互作值较小 ,分别为0 .4 2 %～ 2 .4 %和 0 .2～ 2 .2min。对优势效应大的细胞质类型 ,选择敏感的母本基因型配制杂种有利于提高品质。

光敏小麦雄性不育系A31的育性变异及遗传研究

通过不同生态点的育性试验,观察了光敏小麦雄性不育系A31的育性变异,并结合各试验点的光温条件,分析了A31在7个不同生态点的自交结实率。结果表明,A31雄性育性随日长增加有明显的下降趋势,日长是影响其育性的主导因素,在相近日长条件下,温度对A31育性也有一定的影响;A31育性转换的临界日长约为14.5h。对光敏雄性不育系A31与恢复系1376杂交F2分离群体育性的研究表明,582株F2分离群体的平均结实率为42.16%,变异范围为0～86.67%,由于受异源胞质的影响,F2群体中可育株的平均自交结实率低于恢复系1376的平均结实率。卡方测验表明,F2群体的育性分离符合1对基因的分离比例,所以A31光敏育性可能是由1对基因所控制。