Identifying the alien chromosomes in wheat – Leymus multicaulis derivatives using GISH and RFLP techniques     

Jizeng Jia  Ronghua Zhou  Pei Li  Maolin Zhao  Yushen Dong 《Euphytica》2002,127(2):201-207

Genomic in situ hybridization (GISH) and restriction fragment length polymorphism (RFLP) were used to identify the Leymus multicaulis (XXNN, 2n = 28) chromosomes in wheat-L. muliticaulis derivatives. Fifteen lines containing L. multicaulis alien chromosomes or chromosomal fragments were identified. All alien chromosomes or fragments in these 15 lines were from the X genome and none were from the N genome. Eleven L. multicaulis disomic addition lines and four translocation-addition lines were identified with chromosome rearrangements among homoeologous groups 2, 3, 6 and 7. Only homoeologous group 1 lacked rearrangements in addition or translocation chromosomes. The results revealed that translocation in non-homoeologous chromosomes widely exists in the Triticeae and therefore it is necessary to identify the alien chromosomes (segments) in a wheat background using these combined techniques. During the course of the work, probe PSR112, was found to detect X genome addition lines involving L. multicaulischromosomes. This may prove to be a valuable probe for the identification of alien chromosomes in a wheat background. This revised version was published online in August 2006 with corrections to the Cover Date.  相似文献   

棉花多亲本杂交F_2群体产量性状的效应分析   总被引：2，自引：0，他引：2  

熊玉东  邱新平  丁子福  周雁声 《棉花学报》1996,(1)

本文对棉花聚合杂交体系中９个不同亲人配制的８个单交、１０个４交、１１个８交的Ｆ＿２代群体的产量及产量组合性状进行综合分析。结果表明，随着率交亲本数的增加，聚合程度逐步提高，使产量及主要产量组分的遗传增益不断上升，并达到了显著或极显著水平的增加，其中尤以８交群体的聚合增效最为突出。说明多亲本聚合杂交在棉花丰产、优质、抗病和早熟目标的育种中，对产量性状的提高具有显著效果。  相似文献   

小麦新品种“绵阳26”主要性状与产量的关系     

李邦发  周俊儒 《种子》1997,(6):27-30

对87个试验点的资料分析，绵阳26的主要性状与产量的回归方程为：y=-1084．3321＋5．265x1 9.0142x2＋5.2486x3＋8.3796x4＋6．3627x5。经偏回归和偏相关分析，产量构成因素中，千粒重，有效穗对绵阳26的产量贡献和影响最大（b'4=1．2769．b'2=1．1272，R2y0=0．7287，R4y0=005689）；而千粒重、有效穗、穗粒数之间为负相关，存在着不同程度的制约关系。在本资料现有产量的基础上，稳定千粒重，主攻穗数和穗粒数的提高，是发挥绵阳26高产潜力的决定因素。  相似文献   

Interactions between different genotypic tissues in citrus graft chimeras   总被引：3，自引：0，他引：3  

Jinmei Zhou  Yutaka Hirata  Ill-Sup Nou  Hiroshi Shiotani  Tsutau Ito 《Euphytica》2002,126(3):355-364

The heritability of tolerance of wheat F₃ lines to competition from annual ryegrass (Lolium rigidum), and its relationship to morphological traits, were determined using crosses between wheat cultivars with good and poor competitive ability. Forty F₂-derived F₃ lines from a cross between two late flowering varieties (Machete × Spear) and 40 from a cross between early flowering varieties (Wilgoyne × Gutha) were grown in the field with and without annual ryegrass. There was significant genetic variation between lines within each of the two populations in a number of aspects of plant growth and development, including yield in monoculture. The estimates of heritability for % yield loss due to competition were 0.25 and 0.57 in the two crosses respectively, indicating that selection for high tolerance to competition in the F₃ generation or later should be effective. Fairly strong relationships between height and % yield loss and between leaf length and % yield loss suggest that these may be useful auxiliary traits when selecting for low % yield loss. However, differences between crosses in the magnitude and sign of genetic and phenotypic correlation between traits indicate that competitive ability is a complex character influenced by many factors. This revised version was published online in August 2006 with corrections to the Cover Date.  相似文献   

结核免疫与结核新疫苗的研究进展   总被引：1，自引：0，他引：1  

张更林  周鹏 《分子植物育种》2003,1(2):265-271

本文对近十多年来有关结核免疫的生物学机制和结核疫苗研究进展进行了综述，指出结核疫苗的发展方向，尤其指出植物疫苗是最为廉价、有前途的发展之路。  相似文献   

红菜苔种株采收适期的研究   总被引：2，自引：0，他引：2  

叶志彪  李汉霞 《种子》1994,(2):14-15

该试验分析了红菜苔（Brassicacampestuisvarpurpurea）种株不同采收期对种子产量和种子质量的影响。种子质量是以种子活力、种子发芽力和种子大小进行评价的。结果显示，红菜苔十月红一号品种在种株最老熟荚果内籽粒变色后13天为最佳采收期。  相似文献   

安庆沿江湿地资源利用与保护对策研究   总被引：1，自引：0，他引：1  

周葆华  金宝石 《中国农学通报》2007,23(9):82-82

为了充分发挥安庆沿江湿地资源的优势和潜力,实现区域经济社会发展与生态环境保护的双赢,促进社会主义新农村建设,通过遥感分析和实地调查等方法,深入分析了安庆沿江湿地资源的优势和生态环境面临的问题。从调控湿地生态系统与周边陆域生态系统的耦合关系着手,提出了安庆沿江湿地资源利用与保护的对策:(1)优化农业结构和布局,建立生态保障体系;(2)发展生态水产养殖业,优化湿地生态系统结构;(3)开发湿地生态文化旅游,完善湿地资源保护管理系统。  相似文献   

海南东寨港主要红树植物树高与胸径相关关系   总被引：1，自引：0，他引：1  

王佳燕  余雪标  周光益  雷渊才  王旭  李洪旺 《中国农学通报》2007,23(9):564-568

采用相邻网格法在海南东寨港红树林保护区六个不同红树林群落中共布设六块有代表性的样地,测得454株海莲、129株无瓣海桑、112株海桑、198株秋茄树高与胸径,利用SAS9.0研究了树高(y)与胸径(x1)之间的相关关系。选出了适用于海莲树高预测的最佳回归方程为y=1.40334 0.49758x1 0.00399x12,适用于无瓣海桑、海桑树高预测的最佳回归方程分别为y/1=0.01732 1.10089/x1、y/1=0.01664 1.24603/x1,适用于秋茄树高预测的最佳回归方程为y=1.8165 x1 0.5230和lny=0.54906 0.54559lnx1。回归方程均达到极显著水平(P<0.01),其估计精度较高,均在93%以上,所建方程可用于计算各红树植物树高及其林分平均高。  相似文献   

棉花DUS测试标准品种的SSR指纹数据库构建   总被引：7，自引：2，他引：7  

匡猛  王延琴  周大云  方丹  马磊  杨伟华 《棉花学报》2015,27(1):46-52

基于SSR核心引物,采用荧光毛细管电泳检测系统与多重PCR技术相结合,构建我国棉花DUS(Distinctness,Uniformity and Stability)测试标准品种的DNA指纹数据库并进行遗传多样性分析。依据多重PCR组合的基本原则与五色荧光检测系统的特点,采用40对核心引物构建了10个4重PCR组合,利用DNA遗传分析仪进行指纹检测与数据采集。40对荧光引物在30份DUS测试标准品种中共扩增产生146个等位变异,每对引物的等位变异数为2~7个不等,平均每对引物产生3.65个等位变异。海7124与陆地棉品种明显划分为2类,来源于新疆的新陆早1号区别于其他陆地棉品种,单独聚为1类。多色荧光检测系统相比常规聚丙烯酰胺凝胶电泳具有高精度、高通量、自动化程度高的优点,尤其适用于大规模指纹数据库的构建,提出了通过构建已知品种DNA指纹数据库,将分子标记技术应用于棉花DUS测试的初步设想。  相似文献   

辣椒细胞质雄性不育系离体培养植株再生研究     

邓明华  文锦芬  邹学校  杨德  朱海山  周群初  刘志敏 《中国农学通报》2005,21(10):63-63

以辣椒细胞质雄性不育系9704A和8214A为试材，取无菌苗真叶进行培养。研究了不同浓度的IAA,6-BA和GA3对不定芽的诱导和伸长作用，结果表明：MS+6-BA5.0 mg/L +IAA1.0 mg/L有利于不定芽的诱导。MB+IAA1.0 mg/ L +6-BA3.0 mg/L + GA32.0 mg/L +AgNO310.0 mg/L有利于芽的伸长。将2.0 cm以上的芽转入生根培养基诱导不定根发现：1/2Ms+IAA0.3~0.5 mg/L有利于不定根的诱导。  相似文献