Whole genome selection is a method to gain speed to market. The principle is that during the introgression of a gene from a wild relative into a commercial parent line (the recurrent parent) those plants are chosen with the highest content of recurrent plant.

Below is an example of a F2 population from a cross between two onion species. The percentage of the genome content of one of the parents (Allium cepa) is monitored in the individuals of the F2 population.

Figure 2. The percentage of A. cepa alleles in individual F2 plants sorted from low to high in a population of 65 plants

Figure 3. In figure 3 examples are shown of the percentage recurrent parent of 1 to 4 BC1 plants (black dots) of 6 BC2 populations and percentages recurrent parent in these BC2 plants (blue dots). 

Question Whole Genome Selection.

8.1 What is the theoretical expectation of the presence of the donor parent (donor of whitefly resistance) compared to the recurrent parent (elite line).

8.2 Expectations and gains: