Figure 1.

Realistically, a cycle of genomewide recurrent selection in barley may only be 1 yr in length. Crosses are made in the autumn (year n) and progeny undergo single-seed descent through the following winter and summer. (1) At the F₃ generation during the next autumn (year n + 1), lines are genotyped and predicted genotypic value (PGVs) are determined using training data from the previous cycle. These predictions determine the lines to use as parents in the next cycle of crosses (blue arrow). (2) Predictions are also used to select lines to phenotype in the following summer (year n + 2). (3) This phenotypic information is then incorporated into the training data for the next cycle of predictions and crosses during the subsequent autumn.