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  • 1
    Electronic Resource
    Electronic Resource
    Analysis of the barley and rice genomes by comparative RFLP linkage mapping (1996)
    Springer
    Theoretical and applied genetics 92 (1996), S. 541-551 
    Details
    ISSN: 1432-2242
    Keywords: Synteny ; Orthologous evolution ; Genetic maps ; Triticeae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Comparative genetic mapping of rice and barley, both major crop species with extensive genetic resources, offers the possibility of uniting two well-established and characterized genetic systems. In the present study, we screened 229 molecular markers and utilized 110 polymorphic orthologous loci to construct comparative maps of the rice and barley genomes. While extensive chromosomal rearrangements, including inversions and intrachromosomal translocations, differentiate the rice and barley genomes, several syntenous chromosomes are evident. Indeed, several chromosomes and chromosome arms appear to share nearly identical gene content and gene order. Seventeen regions of conserved organization were detected, spanning 287 cM (24%) and 321 cM (31%) of the rice and barley genomes, respectively. The results also indicate that most (72%) of the single-copy sequences in barley are also single copy in rice, suggesting that the large barley genome arose by unequal crossing over and amplification of repetitive DNA sequences and not by the duplication of single-copy sequences. Combining these results with those previously reported for comparative analyses of rice and wheat identified nine putatively syntenous chromosomes among barley, wheat and rice. The high degree of gene-order conservation as detected by comparative mapping has astonishing implications for interpreting genetic information among species and for elucidating chromosome evolution and speciation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00224556
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Analysis of the barley and rice genomes by comparative RFLP linkage mapping (1996)
    Springer
    Theoretical and applied genetics 92 (1996), S. 541-551 
    Details
    ISSN: 1432-2242
    Keywords: Key words  Synteny ; Orthologous evolution ; Genetic maps ; Triticeae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract   Comparative genetic mapping of rice and barley, both major crop species with extensive genetic resources, offers the possibility of uniting two well-established and characterized genetic systems. In the present study, we screened 229 molecular markers and utilized 110 polymorphic orthologous loci to construct comparative maps of the rice and barley genomes. While extensive chromosomal rearrangements, including inversions and intrachromosomal translocations, differentiate the rice and barley genomes, several syntenous chromosomes are evident. Indeed, several chromosomes and chromosome arms appear to share nearly identical gene content and gene order. Seventeen regions of conserved organization were detected, spanning 287 cM (24%) and 321 cM (31%) of the rice and barley genomes, respectively. The results also indicate that most (72%) of the single-copy sequences in barley are also single copy in rice, suggesting that the large barley genome arose by unequal crossing over and amplification of repetitive DNA sequences and not by the duplication of single-copy sequences. Combining these results with those previously reported for comparative analyses of rice and wheat identified nine putatively syntenous chromosomes among barley, wheat and rice. The high degree of gene-order conservation as detected by comparative mapping has astonishing implications for interpreting genetic information among species and for elucidating chromosome evolution and speciation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050161
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    A numerical study of the effect of free surface and water depth on the stability of wakes: use of GDQ formulation (1997)
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 24 (1997), S. 1079-1090 
    Details
    ISSN: 0271-2091
    Keywords: wake flow ; free surface ; instability ; GDQ method ; Engineering ; Numerical Methods and Modeling
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The instability character of a wake in the presence of a free surface is examined by a recently developed GDQ (generalized differential quadrature) numerical method. It is shown that at low Froude number the wake near a free surface is convectively unstable, but when the Froude number is increased further it becomes absolutely unstable. The effect of water depth on the stability property of the wake flow is also investigated. It is found that the influence of water depth on the critical point of instability is limited to at most 20% variation in the complex frequency, while the change in temporal growth rate is also limited to about 20%. © 1997 John Wiley & Sons, Ltd.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 4
    Electronic Resource
    Electronic Resource
    Design sensitivity coefficients for elasto-viscoplastic problems by boundary element methods (1992)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 34 (1992), S. 947-966 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: This paper is concerned with accurate and efficient determination of design sensitivity coefficients (DSCs) for solid mechanics problems with small strains and rotations, but with material non-linearities present (elasto-plastic or elasto-viscoplastic problems). This approach is based on direct differentiation (DDA) of the relevant derivative boundary element method (DBEM) formulation of the problem. Analytical differentiation of the DBEM equations leads to singular integral equations for the DSCs with weakly (logarithmically for 2-D) singular kernels which are easy to deal with. Also, stress components and their sensitivities are obtained on the boundary of a body with great accuracy. These quantities are typically difficult to obtain accurately from finite element methods (FEM).A computer program for general two-dimensional (plane strain and plane stress) problems has been developed based on the above formulation. Numerical results are presented for some sample problems and these are compared against direct solutions. The agreement between the DBEM and direct solutions is excellent for these examples.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620340318
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    Paper (German National Licenses)
    Fulltext
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