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Managing Global Genetic Resources Agricultural Crop Issues and Policies (1993) / Chapter Skim
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Glossary
Pages 407-414

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From page 407...
... . base collection A comprehensive collection of germplasm accessions held for the purpose of long-term conservation; stocks from the 407
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From page 408...
... clonal propagation The reproduction of plants through asexual means, such as cuttings, grafts, or tissue culture. clone A group of genetically identical individuals that result from asexual, vegetative multiplication; any plant that is propagated vegetatively and that is therefore a genetic duplicate of its parent.
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From page 409...
... genetic diversity In a group such as a population or species, the possession of a variety of genetic traits and alleles that frequently result in differing expressions in different individuals. genetic drift The random fluctuations of gene frequencies due to sampling effects or unintended selection; although genetic drift occurs in all populations, its effects are most evident in small populations.
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From page 410...
... multiallelic genetic stock For cultivated plants, includes multiple gene marker stocks that are useful for linkage studies; also stocks with special combinations of loci necessary for the expression of a single trait. neutral allele Those alleles whose differential contributions to fitness are so small that their frequencies change more owing to drift than to natural selection.
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From page 411...
... primary gene pool For plants, a cultivated species and its wild relatives that are readily intercrossed so that gene transfer is relatively simple. primitive variety See folk variety.
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From page 412...
... Examples include differences in morphological and physiological characters, electrophoretic variation in proteins, and fragment length variation in DNA generated by restriction enzymes. species A taxonomic subdivision; a group of morphologically similar organisms that actually or potentially interbreed and are reproductively isolated from other such groups.
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From page 413...
... The ease with which genes can be transferred from them to the crop varies. wild species Species that have not been subject to breeding to alter them from their (wild)
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Key Terms

  • cultivated species
  • genetic traits
  • gene transfer
  • population size
  • single gene

  • asexual means
  • fragment length
  • restriction enzymes
  • cultivated plants
  • identical individuals

  • potentially interbreed
  • genetically identical
  • genetic resources
  • traditional agricultural
  • germplasm accessions

  • germplasm collection
  • woody perennials
  • genetically heterogeneous
  • collected samples
  • lines except

  • tissues excised
  • herbaceous perennials
  • living tissue
  • include differences
  • mitochondrial dna

  • linkage studies
  • protect genetic
  • base collection
  • includes maintenance
  • useful genetic


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