QTL Mapping of Heading Date and Yield related Traits in Rice Using a Recombination Inbred Lines (RILs) Population Derived from BG1/XLJ     

ZHAN Xiao deng  YU Ping  LIN Ze chuan  CHEN Dai bo  SHEN Xi hong  ZHANG Ying xin  FU Jun lin  CHENG Shi hua  CAO Li yong 《中国水稻科学》2014,28(6):570

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Horticultural Characteristics of Chestnut Growing in Turkey     

Ümit Serdar  Burak Akyüz  Vedat Ceyhan  Kerem Hazneci  Cevriye Mert  Ercan Er  Engin Ertan  Kıymet Senan Çoskuncu Savaş  Vildan Uylaşer 《Erwerbs-Obstbau》2018,60(3):239-245

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苹果砧木组培苗耐盐筛选技术研究   总被引：4，自引：1，他引：3  

王海英  孙建设  马宝盤  刘冬云  刘军侠 《果树学报》2000,17(3)

筛选了供试苹果砧木茎尖培养继代苗耐ＮａＣｌ的临界浓度，比较了０．６％ＮａＣｌ对继代苗、生根苗生长的影响。结果表明，继代苗的受害指数、相对增殖系数、相对生物产量、游离脯氨酸含量及细胞膜透性与砧木耐盐性之间存在一定的相关性，以盐胁迫 ５０ ｄ、盐敏感砧木受害指数高于０．７、继代苗生长严重受抑制为标准，确定继代苗耐ＮａＣｌ的临界浓度为０．６％－０．８％；继代苗、生根苗之间存在耐盐相关性。  相似文献   

一个水稻根长QTL qRL4的分离鉴定     

徐晓明  #  张迎信  #  王会民  任翠  王汝慈  沈希宏  占小登  吴玮勋  程式华  曹立勇 《中国水稻科学》2016,30(4):363-370

为了分离鉴定qRL4,以超级稻协优9308衍生重组自交系与轮回亲本中恢9308(R9308)回交多代的高代回交群体为材料,利用琼脂无土栽培技术,开展水稻根长QTL qRL4的分离鉴定研究,最后将qRL4定位在第4染色体分子标记RM5687与InDel49间624.6kb范围内。此基因的定位与分离鉴定将有助于水稻根长相关遗传机理的研究,为探究在基因水平上的水稻根系形态建成奠定了坚实基础。  相似文献   

试论国有企业改革中“老三会”与“新三会”的关系处理   总被引：1，自引：0，他引：1  

薛选登贺修勇  刘溢海申松涛 《河南科技大学学报(农学版)》2000,20(2):36-38

针对国有企业中“老三会”与“新三会”的矛盾，提出了可使二者协调发展的方法，即双向进入和否决制。  相似文献   

Ecdysteroids: Insect hormones,plant defensive factors,or human medicine?     

Karel Sláma 《Phytoparasitica》1993,21(1):3-8

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Field trials on the prophylaxis of intramammary infections in pregnant heifers     

Malinowski E  Kłossowska A  Kaczmarowski M  Kuźma K  Markiewicz H 《Polish journal of veterinary sciences》2003,6(2):117-124

The study was carried out in 5 farms on 174 pregnant heifers. Clinical examination of the udder and bacteriological tests of quarter secretion were performed between the 8th and 3rd week before parturition, and then the animals were divided into a control group (64 heifers) and 3 experimental groups and immediately treated. A group of 32 experimental heifers was injected once with antioxidants (Vitamin A--600,000 i.u.; Vitamin D3--200,000 i.u.; Vitamin E--1.5 mg/kg b.w., Selenium--0.022 mg/kg b.w., i.m.). The next group (26 heads) was intramammary infused with antibiotic DC product (cloxacillin). Heifers from last experimental group (52) were injected with lysosyme dimer in a single dose of 0.02 mg/kg b.w. Clinical and bacteriological examinations were made during the first week after calving. The presence of bacteria was found in secretion of 22.6-38.9% udder quarters in 56.2-71.2% of pregnant heifers. The number of infected quarters (cows) did not change distinctly in the first week after calving except the lysozyme dimer group, where a decrease by 30% was noted. The percentage of quarters with elevated somatic cell count was higher in antibiotic DC group and closely similar in the other groups. None of examined methods showed an acceptable prophylactic effect. Clinical mastitis cases during first week after parturition were mostly caused by Escherichia coli, Staph. chromogenes, Staph. simulans, Staph. aureus, Staph. hyicus, Str. uberis, Str. acidominimus and Enterococcus faecalis.  相似文献   

Connectivity in Heterogeneous Landscapes: Analyzing the Effect of Topography     

Guy Pe’er  Simone K. Heinz  Karin Frank 《Landscape Ecology》2006,21(1):47-61

Animal response to landscape heterogeneity directs dispersal and affects connectivity between populations. Topographical heterogeneity is a major source of landscape heterogeneity, which is rarely studied in the contexts of movement, dispersal, or connectivity. The current study aims at characterizing and quantifying the impacts of topography on landscape connectivity. We focus on ‘hilltopping’ behavior in butterflies, a dispersal-like behavior where males and virgin females ascend to mountain summits and mate there. Our approach integrates three elements: an individual-based model for simulating animal movements across topographically heterogeneous landscapes; a formula for the accessibility of patches in homogenous landscapes; and a graphical analysis of the plots of the simulation-based vs. the formula-based accessibility values. We characterize the functional relationship between accessibility values and landscape structure (referred to as ‘accessibility patterns’) and analyze the influence of two factors: the intensity of the individuals’ response to topography, and the level of topographical noise. We show that, despite the diversity of topographical landscapes, animal response to topography results in the formation of two, quantifiable accessibility patterns. We term them ‘effectively homogeneous’ and ‘effectively channeled’. The latter, in which individuals move toward a single summit, prevails over a wide range of behavioral and spatial parameters. Therefore, ‘channeled’ accessibilities may occur in a variety of landscapes and contexts. Our work provides novel tools for understanding and predicting accessibility patterns in heterogeneous landscapes. These tools are essential for linking movement behavior, movement patterns and connectivity. We also present new insights into the practical value of ecologically scaled landscape indices.  相似文献   

Vergleich zwischen Total- und königswasserextrahierbaren Elementgehalten in natürlichen Böden und Sedimenten     

Volker Hornburg  Burkhard Lüer 《植物养料与土壤学杂志》1999,162(2):131-137

Comparison between total- and aqua regia extractable contents of elements in natural soils and sediments Total- and aqua regia extractable contents of 19 elements from 28 soil samples with widely varying composition of the ISE ring analytical program (INTERNATIONAL SOIL-ANALYTICAL EXCHANGE) of the year 1995 to 1997 have been taken to find out the comparability between the two fractions. The relations between the two fractions and pH, organic matter and clay content were considered by means of single and multiple regressions. The correlations between the total and aqua regia extractable contents of As, Ca, Cd, Co, Cr, Cu, Fe, Hg, Mg, Mn, Ni, P, Pb and Zn are very close, whereas Al, Ba, K, Na and Sr are not or only weakly correlating. The multiple regressions show that the content of some aqua regia extractable elements and the proportion (in %) of the total contents is correlated with pH, organic matter and/or content of clay. In the same way the proportion of aqua regia extractable elements is closely related (except Fe and Hg) to the soil pH. Hereby the proportion of the aqua regia extractable content increases with increasing pH in the range 3,5—7,7. The determined equations are tested for As, Cd, Co, Cr, Cu, Hg, Mn, Ni, Pb and Zn by using the values of certified reference material. The estimated aqua regia extractable contents are being compared with values of reference material. The average proportion of the calculated to the measured aqua regia contents of an element in percent are 99 for Zn, 98 for Co, Cu and Mn, 94 for Cd, 90 for Ni, 88 for Cr, 105 for Hg, 113 for As and 114 for Pb.  相似文献   

Water pH and Prochilodus lineatus larvae survival     

E. Zaniboni-Filho  A. P. O. Nuñer  D. A. Reynalte-Tataje  R. L. Serafini 《Fish physiology and biochemistry》2009,35(1):151-155

The present study aimed to determine the influence of water pH on survival of curimbatá, Prochilodus lineatus, larvae. Forty-five 2-l glass aquaria with artificial aeration and no water exchange were stocked at a density of 10 larvae l⁻¹. The pH values used as treatments were 3.7 ± 0.0, 4.0 ± 0.0, 4.4 ± 0.2, 4.6 ± 0.2, 4.8 ± 0.2, 5.1 ± 0.2, 5.3 ± 0.2, 5.6 ± 0.2, 7.2 ± 0.2, 8.7 ± 0.4, 9.0 ± 0.4, 9.2 ± 0.4, 9.4 ± 0.6, 9.7 ± 0.5 and 10.0 ± 0.5 in a completely random experimental design with three repetitions. Water pH was maintained by the addition of NaOH or H₂SO₄ solutions. After 72 h of experiment, no survival was registered at pH below 4.6, 1.5% survival at pH 4.6, and about 50% survival at pH 9.4 and above. Survival rates between 70 and 80% were registered at pH 4.8–5.6 and at pH 7.2, whereas over 90% survival was registered at pH between 8.7 and 9.2.  相似文献