Table 1.

Median relative absolute error (MRdAE) for each imputation method in the two subdatabases, averaged over all percentages of missing data (1–46%). A Kruskal–Wallis ANOVA and its ad hoc test were conducted to test the effect of the different methods on the MRdAE. A lower MRdAE means less error due to the imputation of missing values. The letters in a column correspond to the results of the ad hoc test

	H		LDMC		LM		LS		RH		SM		SNP		SS		SLA
Methods	MRdAE	Adhoc	MRdAE	Adhoc	MRdAE	Adhoc	MRdAE	Adhoc	MRdAE	Adhoc	MRdAE	Adhoc	MRdAE	Adhoc	MRdAE	Adhoc	MRdAE	Adhoc
Whole database
Average	1.158	a	0.276	a	4.570	a	4.203	a	1.061	a	7.561	a	44.623	a	0.791	a	0.253	a
Median	0.531	d	0.262	d	0.918	d	0.941	d	0.516	d	0.904	d	1.168	d	0.515	c	0.239	d
MICE	0.253	b	0.235	b	0.164	b	0.192	b	0.259	b	0.242	b	0.283	b	0.426	b	0.241	b
Dissimilarity	0.495	c	0.252	c	0.779	c	0.834	c	0.477	c	0.798	c	1.356	c	0.480	b	0.231	c
Relationships	0.735	e	0.242	e	1.685	e	1.210	d	0.770	e	4.123	e	44.263	a	0.647	d	0.232	e
Herbaceous database
Average	0.590	a	0.281	a	4.241	a	3.774	a	0.528	a	5.342	a	38.180	a	0.776	a	0.250	a
Median	0.512	d	0.258	d	0.926	d	0.932	d	0.483	d	0.893	d	1.158	d	0.516	d	0.233	cd
MICE	0.209	b	0.239	b	0.159	b	0.194	b	0.201	b	0.303	b	0.257	b	0.421	b	0.238	b
Dissimilarity	0.306	c	0.242	c	0.625	c	0.641	c	0.295	c	0.763	c	1.504	c	0.460	c	0.230	c
Relationships	0.226	e	0.249	e	1.597	e	1.185	e	0.223	e	3.354	e	34.725	e	0.629	e	0.233	d

H, vegetative height; LDMC, leaf dry matter content; LM, leaf mass; LS, leaf surface; MICE, Multivariate Imputation by Chained Equations; RH, reproductive height; SM, seed mass; SNP, seeds number per plant; SS, seed shape; SLA, specific leaf area.