Fig. 1From: Prediction of hybrid performance in maize with a ridge regression model employed to DNA markers and mRNA transcription profilesCross validation schemes. a Evaluation of prediction accuracy for untested hybrids in an incomplete factorial. The hybrids in the validation set are of type 2. b Evaluation of prediction accuracy for hybrids derived from parental lines of which no testcross data are available. The hybrids in the validation set are of type 0. D01–D14: parental dent lines in random order, F01–F07: parental flint lines in random order, E: hybrids of the estimation set, V: hybrids of the validation setBack to article page