Table 1.

Variance components of the raw and the curated data set for powdery mildew infection measured as percentage of infected leaf area.

	Raw data		Curated data
Component	Estimation	SE	Estimation	SE
Experiment	198.89	14.52	157.58	11.99
Experiment:Tray	25.46	2.29	26.03	2.35
Genotype	159.77	3.73	172.69	3.92
Residual	140.16	1.89	131.26	1.83
Heritability	0.73		0.75
SD	0.005		0.005

The factor “Experiment” reflects which genotypes were infected and measured in one batch, “Tray” reflects all genotypes grown in a tray in the greenhouse. All components shown are significant at a threshold of 0.01. The standard deviation (SD) of the heritability was estimated from 500 heritability estimates using different random samples containing 80% of the total genotypes.