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  • 1
    Electronic Resource
    Electronic Resource
    Adjustment of Nonlinear Models for Lignin and Its Degradation Products during the Aging of Armagnac (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 52 (1987), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Changes in lignin and in its degradation products, namely aromatic acids and aldehydes, were monitored in Armagnac brandies stored in old or new barrels. The concentration of these substances was always higher in the brandies aged in new barrels than in those aged in older barrels. Among the various mathematical models proposed, the parabolic function always showed the least residual error. A parameter n that might characterize the age of a barrel was defined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1987.tb14062.x
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  • 2
    Electronic Resource
    Electronic Resource
    Sur le comportement photochimique des 19-nor Delta5,7-steroides
    Amsterdam : Elsevier
    Tetrahedron 4 (1958), S. 241-245 
    Details
    ISSN: 0040-4020
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0040-4020(58)80045-9
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  • 3
    Electronic Resource
    Electronic Resource
    Optimal structure of protocol designs for building genetic linkage maps in livestock (1994)
    Springer
    Theoretical and applied genetics 88 (1994), S. 129-134 
    Details
    ISSN: 1432-2242
    Keywords: Linkage map ; Livestock ; Simulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We investigated protocol designs for gene mapping in livestock. The optimization of the population structure was based on the empirical variance of the recombination rate estimator. We concluded that a mixture of half-sib and full-sib families is preferred to half-sib families; a knowledge of parental phases does not improve the quality of the estimation for typical livestock families with five offspring or more; and measurements of the genotype of the mates in half-sib families are not useful. Graphs and algebraic approximations for the practical choice of family size and structure are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00222405
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  • 4
    Electronic Resource
    Electronic Resource
    Maximum-likelihood models for mapping genetic markers showing segregation distortion. 2. F2 populations (1995)
    Springer
    Theoretical and applied genetics 90 (1995), S. 81-89 
    Details
    ISSN: 1432-2242
    Keywords: Genetic mapping ; Maximum-likelihood ; Molecular markers ; Gametic selection ; Zygotic selection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In F2 populations, gametic and zygotic selection may affect the analysis of linkage in different ways. Therefore, specific likelihood equations have to be developed for each case, including dominant and codominant markers. The asymptotic bias of the “classical” estimates are derived for each case, in order to compare them with the standard errors of the suggested estimates. We discuss the utility and the efficiency of a previous model developed for dominant markers. We show that dominant markers provide very poor information in the case of segregation distortion and, therefore, should be used with circumspection. On the other hand, the estimation of recombination fractions between codominant markers is less affected by selection than is that for dominant markers. We also discuss the analysis of linkage between dominant and codominant markers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00220999
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  • 5
    Electronic Resource
    Electronic Resource
    Correction: power of tests for QTL detection using replicated progenies derived from a diallel cross (1996)
    Springer
    Theoretical and applied genetics 92 (1996), S. 128-129 
    Details
    ISSN: 1432-2242
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050103
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  • 6
    Electronic Resource
    Electronic Resource
    A method to measure genetic distance between allogamous populations of alfalfa (Medicago sativa) using RAPD molecular markers (1998)
    Springer
    Theoretical and applied genetics 96 (1998), S. 406-412 
    Details
    ISSN: 1432-2242
    Keywords: Key words Medicago sativa ; RAPD ; Cultivars ; Genetic distance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Alfalfa (Medicago sativa L.) is a forage legume of world-wide importance whose both allogamous and autotetraploid nature maximizes the genetic diversity within natural and cultivated populations. This genetic diversity makes difficult the discrimination between two related populations. We analyzed this genetic diversity by screening DNA from individual plants of eight cultivated and natural populations of M. sativa and M.  falcata using the RAPD method. A high level of genetic variation was found within and between populations. Using five primers, 64 intense bands were scored as present or absent across all populations. Most of the loci were revealed to be highly polymorphic whereas very few population-specific polymorphisms were identified. From these observations, we adopted a method based on the Roger’s genetic distance between populations using the observed frequency of bands to discriminate populations pairwise. Except for one case, the between-population distances were all significantly different from zero. We have also determined the minimal number of bands and individuals required to test for the significance of between-population distances.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050756
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  • 7
    Electronic Resource
    Electronic Resource
    Comparing methods to detect more than one QTL on a chromosome (1998)
    Springer
    Theoretical and applied genetics 96 (1998), S. 628-633 
    Details
    ISSN: 1432-2242
    Keywords: Key words QTL detection ; Mapping ; Simultations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  The aim of this paper was to compare different methods for testing the presence of one versus multiple QTLs on a same chromosome. We describe different methods that have partially been taken out of the literature. We perform simulations covering different situations to compare the power of these methods for detecting more than one QTL. None of the tests considered appear to be similar; that is, the first-type error depends on the value of the parameters concerning the first QTL. The method starting with a two-QTL model is the most powerful in many situations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050781
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  • 8
    Electronic Resource
    Electronic Resource
    Evaluation of selection index: application to the choice of an indirect multitrait selection index for soybean breeding (1990)
    Springer
    Theoretical and applied genetics 79 (1990), S. 261-267 
    Details
    ISSN: 1432-2242
    Keywords: Selection index ; Error of prediction ; BLUP ; Soybean
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Selection indices can be used to predict one trait from information available on several traits in order to improve the prediction accuracy. Plant or animal breeders are interested in selecting only the best individuals, and need to compare the efficiency of different trait combinations in order to choose the index ensuring the best prediction quality for individual values. As the usual tools for index evaluation do not remain unbiased in all cases, we propose a robust way of evaluation by means of an estimator of the mean-square error of prediction (EMSEP). This estimator remains valid even when parameters are not known, as usually assumed, but are estimated. EMSEP is applied to the choice of an indirect multitrait selection index at the F5 generation of a classical breeding scheme for soybeans. Best predictions for precocity are obtained by means of indices using only part of the available information.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00225961
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  • 9
    Electronic Resource
    Electronic Resource
    Correction: power of tests for QTL detection using replicated progenies derived from a diallel cross (1996)
    Springer
    Theoretical and applied genetics 92 (1996), S. 128-129 
    Details
    ISSN: 1432-2242
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00222962
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  • 10
    Electronic Resource
    Electronic Resource
    Power of tests for QTL detection using replicated progenies derived from a diallel cross (1993)
    Springer
    Theoretical and applied genetics 86 (1993), S. 1014-1022 
    Details
    ISSN: 1432-2242
    Keywords: Diallel ; Restriction fragment length polymorphism markers ; Replicated progenies ; Linear models ; Power of test
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In crop species, most QTL (quantitative trait loci) mapping strategies use segregating populations derived from an initial cross between two lines. However, schemes including more than two parents could also be used. We propose an approach using a high-density restriction fragment length polymorphism (RFLP) map established on six F 2 populations derived from diallel crosses among four inbred lines and the phenotypic performances of two types of replicated progenies (F 3 and topcross). The QTL is supposed to be on the marker locus considered. Three linear model tests for the detection of QTL effects (T 1, T 2 and T 3) are described and their power studied for the two types of progeny. T 1 tests the global genetic effects of the QTL (additivity and dominance) and T 2 tests only additive effects assuming dominance is absent when it could exist. The models of these two tests assume that the main effects of QTL alleles are constant in different genetic backgrounds. The additive model of test T 3 considers the six F 2 populations independently, and T 3 is the equivalent of the classical mean comparison test if we neglect dominance; it uses only contrasts between the homozygote marker classes. The results show that T 2 is much more powerful than T 3. The power of T 1 and T 2 depends on the relative sizes of the additive and dominance effects, and their comparison is not easy to establish. Nevertheless, T 2 seems to be the more powerful in most situations, indicating that it is often more interesting to ignore dominance when testing for a QTL effect. For a given size of genetic effects, the power is affected by the total number of individuals genotyped in F 2 and the recombination rate between the marker locus and the putative QTL. The approach presented in this paper has some drawbacks but could be easily generalized to other sizes of diallels and different progeny types.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00211055
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