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  • 1
    ISSN: 1573-5060
    Keywords: Plant genetic resources ; conservation method ; sample size
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A criterion was presented to define the most efficient strategy for the exploration and maintenance of plant genetic resources. All of the three factors composing the efficiency. i.e., multiplicity of target populations. the amount of expenses, and goodness for individual populations of the conservation manipulation adopted, were incorporated in the present criterion. Sample size per target population for field collection was investigated on the basis of this criterion, leading to the conclusion that the number of visited populations rather than sample size per population determines the overall efficiency of a collection project as a whole. Without any particular reason, intensive sampling for a limited number of populations is not logical. A sample size as small as ten plants per site or population was estimated reasonable to cover a large target area.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    ISSN: 1573-5060
    Keywords: Sampling method ; sample size ; field collection ; genetic resources
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A method to collect germplasms from natural plant populations (collection sites) has been investigated for the numbers of plants and seeds per plant to be sampled. It is derived that in predominantly selfing populations the success of sampling is primarily determined by the number of plants rather than seeds per plant, since the genotypes of seed embryos produced on a highly selfing plant are highly homozygous and homogeneous. The number of plants, however, does not need to be large. The drawback of a shortage in the plant number can be avoided by collecting sufficient seeds from each plant. Computations for some probable situations lead to the conclusion that a few plants per population may be enough if the plants bear a few hundred seeds each and are not highly selfing. This sample size is much smaller and more practicable than those proposed previously.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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