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  • 1
    Electronic Resource
    Electronic Resource
    DNA fingerprint variability within and among parental lines and its correlation with performance of F1 laying hens (1996)
    Springer
    Theoretical and applied genetics 92 (1996), S. 769-776 
    Details
    ISSN: 1432-2242
    Keywords: Key words Chicken ; DNA fingerprinting ; Correlation ; Crosses ; Production traits
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Genetic diversity within and among nine pure lines of Beijing White Leghorn chickens was determined by DNA fingerprinting using human ministatellite probes 33.6 and α-globin 3′HVR, as well as bacteriophage M13. Within lines similarity coefficients ranged from 0.497 to 0.628, significantly higher than that within a sample of white chicken from a local market. Relationships among lines were established by clustering analysis based on inter-line coefficients of difference calculated from DNA fingerprints of pooled DNA. A complete diallel crossing among the nine pure lines was conducted. By using linear correlation analysis, it was found that the maximum distance between parental lines was positively correlated with egg number, egg production, survival rate and their corresponding heterosis percentages within a pair of reciprocal crosses. Similar relationships were found where only the higher of the reciprocal crosses were used in the analysis. It was also shown that similarity coefficients within a sire line or dam line were positively correlated with 40-week egg number and its heterosis percentage and the heterosis percentage for 40-week egg production, but negatively correlated with the 40-week survival rate of the crossbred populations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050190
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    DNA fingerprint variability within and among parental lines and its correlation with performance of F1 laying hens (1996)
    Springer
    Theoretical and applied genetics 92 (1996), S. 769-776 
    Details
    ISSN: 1432-2242
    Keywords: Chicken ; DNA fingerprinting ; Correlation ; Crosses ; Production traits
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Genetic diversity within and among nine pure lines of Beijing White Leghorn chickens was determined by DNA fingerprinting using human ministatellite probes 33.6 and α-globin 3′HVR, as well as bacteriophage M13. Within lines similarity coefficients ranged from 0.497 to 0.628, significantly higher than that within a sample of white chicken from a local market. Relationships among lines were established by clustering analysis based on inter-line coefficients of difference calculated from DNA fingerprints of pooled DNA. A complete diallel crossing among the nine pure lines was conducted. By using linear correlation analysis, it was found that the maximum distance between parental lines was positively correlated with egg number, egg production, survival rate and their corresponding heterosis percentages within a pair of reciprocal crosses. Similar relationships were found where only the higher of the reciprocal crosses were used in the analysis. It was also shown that similarity coefficients within a sire line or dam line were positively correlated with 40-week egg number and its heterosis percentage and the heterosis percentage for 40-week egg production, but negatively correlated with the 40-week survival rate of the cross-bred populations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00226100
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    Paper (German National Licenses)
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  • 3
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    Analysis of stratocumulus cloud fields using LANDSAT imagery: Size distributions and spatial separations (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-01-25
    Description: Stratocumulus cloud fields in the FIRE IFO region are analyzed using LANDSAT Thematic Mapper imagery. Structural properties such as cloud cell size distribution, cell horizontal aspect ratio, fractional coverage and fractal dimension are determined. It is found that stratocumulus cloud number densities are represented by a power law. Cell horizontal aspect ratio has a tendency to increase at large cell sizes, and cells are bi-fractal in nature. Using LANDSAT Multispectral Scanner imagery for twelve selected stratocumulus scenes acquired during previous years, similar structural characteristics are obtained. Cloud field spatial organization also is analyzed. Nearest-neighbor spacings are fit with a number of functions, with Weibull and Gamma distributions providing the best fits. Poisson tests show that the spatial separations are not random. Second order statistics are used to examine clustering.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA, Langley Research Center, FIRE Science Results 1988; p 277
    Format: text
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  • 4
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    Cloud field classification based upon high spatial resolution textural features. I - Gray level co-occurrence matrix approach (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Stratocumulus, cumulus, and cirrus clouds were identified on the basis of cloud textural features which were derived from a single high-resolution Landsat MSS NIR channel using a stepwise linear discriminant analysis. It is shown that, using this method, it is possible to distinguish high cirrus clouds from low clouds with high accuracy on the basis of spatial brightness patterns. The largest probability of misclassification is associated with confusion between the stratocumulus breakup regions and the fair-weather cumulus.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Journal of Geophysical Research (ISSN 0148-0227); 93; 12663-12
    Format: text
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  • 5
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    Classification of cloud fields based on textural characteristics (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The present study reexamines the applicability of texture-based features for automatic cloud classification using very high spatial resolution (57 m) Landsat multispectral scanner digital data. It is concluded that cloud classification can be accomplished using only a single visible channel.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Digital Image Processing and Visual Communications Technologies in Meteorology; Oct 27, 1987 - Oct 28, 1987; Cambridge, MA; United States
    Format: text
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  • 6
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    Cloud field classification based upon high spatial resolution textural features. II - Simplified vector approaches (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: This paper compares the results of cloud-field classification derived from two simplified vector approaches, the Sum and Difference Histogram (SADH) and the Gray Level Difference Vector (GLDV), with the results produced by the Gray Level Cooccurrence Matrix (GLCM) approach described by Welch et al. (1988). It is shown that the SADH method produces accuracies equivalent to those obtained using the GLCM method, while the GLDV method fails to resolve error clusters. Compared to the GLCM method, the SADH method leads to a 31 percent saving in run time and a 50 percent saving in storage requirements, while the GLVD approach leads to a 40 percent saving in run time and an 87 percent saving in storage requirements.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Journal of Geophysical Research (ISSN 0148-0227); 94; 14749-14
    Format: text
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  • 7
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    Cumulus cloud field morphology and spatial patterns derived from high spatial resolution Landsat imagery (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Using high-spatial-resolution Landsat MSS imagery, the cumulus cloud morphology, cloud nearest-neighbor distributions, and cloud clumping scales were investigated. It is shown that the cloud-size distribution can be represented by a mixture of two power laws; clouds of diameters less than 1 km have power-law slope range of 1.4-2.3, while larger clouds have slopes from 2.1 to 4.75. The break in power-law slope occurs at the cloud size that makes the largest contribution to cloud cover. Results suggest that larger clouds grow at the expense of smaller clouds. It was also found that the cloud inhomogeneities have significant impact on radiative fluxes.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Journal of Applied Meteorology (ISSN 0894-8763); 29; 1245-126
    Format: text
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