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  • 1
    Electronic Resource
    Electronic Resource
    Random amplified polymorphic DNA markers reveal low genetic variation and a single dominant genotype in Eichhornia crassipes populations throughout China (2005)
    Oxford, UK : Blackwell Science Ltd
    Weed research 45 (2005), S. 0 
    Details
    ISSN: 1365-3180
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Genetic variation within and between 34 populations of Eichhornia crassipes (water hyacinth) in China was surveyed using random amplified polymorphic DNA (RAPD) markers. A total of 1009 individuals were analysed, for which 12 RAPD primers amplified 69 reproducible bands, with 22 (32%) being polymorphic. The percentage of polymorphic loci (p) within a population ranged from 4.4% to 17.4%, and the mean Nei's gene diversity (He) was 0.046 ± 0.0145, indicating a low genetic diversity of E. crassipes in China. Each population contained at least four RAPD phenotypes (genotypes), and the same particular genotype was invariably dominant in all the populations sampled. The mean proportion of distinguishable genotypes was 0.29. Analysis of molecular variance revealed a large proportion of genetic variation (83.9%) residing within populations and a slightly larger proportion (88.1%) within localities, indicating a low genetic differentiation of E. crassipes populations, both locally and regionally. Human-mediated dispersal, vigorous clonal growth, and a generally low level of sexual reproduction were thought to be responsible for such a pattern of genetic structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3180.2005.00445.x
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  • 2
    Electronic Resource
    Electronic Resource
    The thermal refractive index coefficients of 7.5 mol % Nb:KTiOPO4 crystals (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 86 (1999), S. 3516-3518 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The principal refractive indices and thermal refractive index coefficients for Nb:KTiOPO4 (KTP) crystal grown by the top-seed flux method from a starting material containing 7.5 mol % Nb have been measured using the autocollimation method. Using measurements made at wavelengths of 0.53975, 0.6328, 1.0795, and 1.3414 μm, in the temperature range from ambient to 188 °C, it is possible to determine the constants of the Sellmeier equations and the thermal refractive index coefficients as a function of wavelength. Also, the temperature acceptance bandwidth at 90° second harmonic generation noncritical phase matching direction was calculated. Comparison of these results with those for undoped KTiOPO4 [K. Rato, IEEE J. Quantum Electron QE-28, 1974 (1992)] and KNbO3 [B. Zysset, I. Biaggo, and P. Gunter, J. Opt. Soc. Am. B 9, 380 (1992)] implies that Nb-doped KTP crystals are suitable for blue coherent light devices. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.371251
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  • 3
    Electronic Resource
    Electronic Resource
    Migration, Metapopulation Dynamics and Fugitive Co-existence
    Amsterdam : Elsevier
    Journal of Theoretical Biology 163 (1993), S. 491-504 
    Details
    ISSN: 0022-5193
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1006/jtbi.1993.1134
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  • 4
    Electronic Resource
    Electronic Resource
    Is Heterozygous Advantage Necessary for Polymorphism in One-locus Two-allele Systems?
    Amsterdam : Elsevier
    Journal of Theoretical Biology 166 (1994), S. 245-250 
    Details
    ISSN: 0022-5193
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1006/jtbi.1994.1022
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  • 5
    Electronic Resource
    Electronic Resource
    Identification of Haynaldia villosa chromosomes added to wheat using a sequential C-banding and genomic in situ hybridization technique (1996)
    Springer
    Theoretical and applied genetics 92 (1996), S. 116-120 
    Details
    ISSN: 1432-2242
    Keywords: Key words Haynaldia villosa  ;  Triticum aestivum  ; C-banding  ;  Genomic in situ hybridization  ;  Alien chromosome addition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Genomic in situ hybridization (GISH) offers a convenient and effective method for cytological detection, but can not determine the identity of the chromosomes involved. We integrated C-banding with GISH to identify Haynaldia villosa chromosomes in a wheat background. All chromosomes of H. villosa showed C-bands, either in telomeric regions or in both telomeric and centromeric regions, which allowed unequivocal identification of each H. villosa chromosome. The seven pairs of H. villosa chromosomes were differentiated as 1–7 according to their characteristic C-bands. Using a sequential C-banding and GISH technique, we have analyzed somatic cells of F3 plants from the amphiploid Triticum aestivum-H. villosaבYangmai 158’ hybrids. Three plants (94009/5-4, 94009/5-8 and 94009/5-9) were shown to contain H. villosa chromosome(s). 94009/5-4 (2n=45) had three H. villosa chromosomes (2, 3 and 4); 94009/5-8 (2n=45) possessed one chromosome 4 and a pair of chromosome 5, and 94009/5-9 (2n=43) was found to have one chromosome 6 of H. villosa. The combination of GISH with C-banding described here provides a direct comparison of the cytological and molecular landmarks. Such a technique is particularly useful for identifying and localizing alien chromatin and DNA sequences in plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050101
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  • 6
    Electronic Resource
    Electronic Resource
    Identification of Haynaldia villosa chromosomes added to wheat using a sequential C-banding and genomic in situ hybridization technique (1996)
    Springer
    Theoretical and applied genetics 92 (1996), S. 116-120 
    Details
    ISSN: 1432-2242
    Keywords: Haynaldia villosa ; Triticum aestivum ; C-banding ; Genomic in situ hybridization ; Alien chromosome addition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Genomic in situ hybridization (GISH) offers a convenient and effective method for cytological detection, but can not determine the identity of the chromosomes involved. We integrated C-banding with GISH to identify Haynaldia villosa chromosomes in a wheat background. All chromosomes of H. villosa showed C-bands, either in telomeric regions or in both telomeric and centromeric regions, which allowed unequivocal identification of each H. villosa chromosome. The seven pairs of H. villosa chromosomes were differentiated as 1–7 according to their characteristic C-bands. Using a sequential C-banding and GISH technique, we have analyzed somatic cells of F3 plants from the amphiploid Triticum aestivum-H. villosa x ‘Yangmai 158’ hybrids. Three plants (94009/5-4,94009/5-8 and 94009/5-9) were shown to contain H. villosa chromosome(s). 94009/5-4 (2n = 45) had three H. villosa chromosomes (2, 3 and 4); 94009/5-8 (2n = 45) possessed one chromosome 4 and a pair of chromosome 5, and 94009/5-9 (2n = 43) was found to have one chromosome 6 of H. villosa. The combination of GISH with C-banding described here provides a direct comparison of the cytological and molecular landmarks. Such a technique is particularly useful for identifying and localizing alien chromatin and DNA sequences in plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00222960
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