Contributing traits for nitrogen use efficiency in selected wheat genotypes and corollary between screening methodologies

Figures & data

Table 1. Mean of 2 years for characters for subset genotypes.

Trait	Mean (SE)		Range
	HN	LN	HN	LN
SDW	0.733 (0.256)	0.44 (0.163)	0.326–1.276	0.235–0.684
RDW	0.077 (0.171)	0.099 (0.076)	0.018–0.179	0.053–0.148
RL	34.088 (1.242)	74.3 (1.32)	21.306–47.867	52.3–92.17
R:S	0.102 (0.141)	0.226 (0.082)	0.025–0.212	0.167- 0.353
N%	2.065 (0.136)	1.761(0.122)	1.693–2.44	1.376–2.065
gN	0.015 (0.044)	0.008 (0.024)	0.006–0.029	0.004–0.012
NUpE	0.673 (0.29)	1.368 (0.29)	0.272–1.274	0.739–2.134
NUtE	48.847 (0.68)	57.25 (0.732)	40.9–59.06	48.4–72.6
NUE	32.378 (1.779)	77.846 (2.15)	13.7–58.86	41.2–120

Table 2. Phenotypic correlation under LN (above diagonal) and HN (below diagonal) for different root traits in the subset genotypes under hydroponic screening.

Trait	RDW	RL	R:S	N%	NUpE	NUtE	NUE
RDW	1	NS	0.387^NS	NS	0.767**	NS	0.745**
RL	0.823**	1	NS	NS	NS	NS	NS
R:S	0.841**	0.732**	1	0.26^NS	−0.22^NS	−0.258^NS	−0.323^NS
N%	0.346^NS	NS	0.288^NS	1	NS	−0.990**	NS
NUpE	0.793**	0.548*	0.376^NS	0.501*	1	NS	0.967**
NUtE	−0.33^NS	NS	−0.294^NS	−0.994**	−0.480*	1	NS
NUE	0.769**	0.588**	0.320^NS	0.253^NS	0.961**	−0.231^NS	1

** Significant at 1%, * significant at 5% and NS (non-significant)

Table 3. Mean of characters under study for subset genotypes in pipe under HN and LN.

Traits	Mean (SE)		Range
	HN	LN	HN	LN
Shoot dry weight (SDW-g)	12.6 (0.343)	6.663 (0.477)	9.78–14.4	3.92–8.16
Root dry weight (RDW-g)	2.43 (0.28)	2.378 (0.442)	1.425–3.525	1.03–4.05
Total dry weight (TDW-g)	15.1 (0.397)	9.041(0.582)	11.21–16.91	4.95–12.21
Root: Shoot (R:S)	0.19 (0.061)	0.357 (0.139)	0.146–0.278	0.264–0.496
Root length (RL-cm)	69.36 (1.266)	74.737 (1.402)	55.25–90.25	55.00–97.00
Plant height (PH-cm)	67.56(0.746)	66.816 (0.981)	55.5–81.5	46.00–83.50
No. of tillers (TN)	4.743 (0.374)	4.553 (0.425)	3.5–6.75	3.00–6.50
Length of spike (SL-cm)	11.67 (0.189)	11.782 (0.292)	10.25–13	10.00–13.75
No. of spikes (SN)	3.51 (0.319)	3.474 (0.405)	2.25–5	1.75–5.00
Nitrogen (N%)	1.061 (0.144)	1.119 (0.183)	0.812–1.314	0.60–1.44
Gram N in shoot (gN)	0.135 (0.07)	0.075 (0.072)	0.099–0.174	0.03–0.10
NUpE	0.193 (0.083)	0.261 (0.135)	0.142–0.249	0.126–0.355
NUtE	96.1 (1.408)	92.771 (2.232)	76.103–123.09	69.31–166.03
NUE	18.09 (0.41)	23.298 (0.891)	13.98–20. 57	13.70–28.53

Figure 1. Correlation between the traits for subset genotypes in pipe under H N.

Figure 2. Correlation of traits between hydroponic and pot experiment.