Table 2.

Sample size for each five Av-spectra of the different species, cultivars, provinces, and experiments. Ec2 in exp. 2-1 did not germinate. For each cultivar/provenience10 plants grew individually in pots. From each plant, one root was extracted to gain the five root segments. Over each root position the Av-spectra was averaged (see Figure 1). The exception was experiment 1-1, in several cases two roots were harvested which led to a higher sample size for the Av-spectra.

	exp. 1-1	exp. 1-2	united exp. 1a		exp. 2-1	exp. 2-2	united exp. 2b
Ps1	11–14	10	21–24	Zm1	10	10	20
Ps2	12–13	9–10	21–23	Zm2	10	10	20
Ps3	11–14	8–10	21–24	Zm3	10	7–10	17–20
Ps4	11–12	10	21–21	Zm4	10	10	20
Ps5	10–12	9–10	19–22	Zm5	10	9–10	19–20
Ps6	11–12	10	21–22	Zm6	10	10	20
				Zm7	10	10	20
As1	21	10	31
As2	23	10	33	Ec1	10	9–10	19–20
As3	19–20	10	29–30	Ec2	-	7–10	7–10
As4	20	10	30	Ec3	10–11	7–11	18–21
As5	20–21	9–10	30–31	Ec4	9–10	9–10	19–20
				Ec5	10	8–10	18–20

^athe experiments 1-1 and 1-2 were united and subsequently evaluated together.

^bthe experiments 2-1 and 2-2 were united and subsequently evaluated together.