Subject: Paper/Carlos F.Quiros
Date: Wednesday, November 15, 1995 8:03AM
APPLICATION OF CHROMOSOME MARKERS TO GERMPLASM CONSERVATION AND
Carlos F. Quiros
Department of Vegetable Crops
U. of California
Davis, CA 95616, USA
A brief overview of genetic markers for germplasm characterization is presented. These include
biochemical and DNA-based markers which accomplish the task effectively because often their
expression reflects the actual genotype of the individuals in the population, free of environmental
influences. Furthermore, these markers are neutral, not affecting the fitness or survival of the plants.
Genetic markers can be used for the elimination of duplicates, the determination of the genetic
variability of the samples in relation to their breeding systems, and the optimal number of individuals
to use for maintaining the genetic variability when the seed is increased. Morphological traits are not
reliable for this determination because the resulting phenotypes are the consequence of genotypic
and environmental interactions.