Figure 3

Proposed models for the genomic mechanisms resulting in lower gene representation in the gametoclones. Genes are depicted as blue and green cylinders and primers as red (specific) and orange (non-specific) arrows. Yellow flashes label deletion limits and the white arrow indicates conversion of standard to null allele. In each panel up and down drawings represent two alleles of a given locus in the diploid variety. The number or equation on the right is the relative gene dosage estimated for a haploid line inheriting the corresponding allele located on the same level. Gene dosages are always one for the diploid line. For further explanations see the text. (A) Standard case; (B) Hemizygotic model; (C) Technical deletion model; (D) Polymorphic tandem repeats model; (E) Polymorphic sequence model; (F) Hemizygotic model and cross-reaction.