QTL Analyses
Dormancy is a quantitative trait, involving
many genes and is influenced substantially by environmental factors. Within a
given plant species, different accessions of wild plants and different
varieties of cultivated plants exhibit genetic variation in seed dormancy.
Quantitative traits are becoming more amenable to genetic analysis because the
position of quantitative trait loci (QTL) and the relative contribution of
these loci can now be determined (reviewed in Koornneef et al., 2002).