BMC Plant Biology

Table 3 Correlation coefficients among the 11 agronomic traits studied across two normal-N and two low-N conditions

From: Validation of QTL mapping and transcriptome profiling for identification of candidate genes associated with nitrogen stress tolerance in sorghum

	Chl1	Chl2	Chl3	PH	AD	MC1	MC2	BY	GY	TGW	GS
Chl1		0.67***	0.43***	−0.34***	−0.24**	0.056	−0.20**	−0.023	0.081	−0.17*	0.16*
Chl2	0.74***		0.68***	−0.43***	−0.35***	−0.008	−0.23**	−0.029	0.115	−0.071	0.19**
Chl3	0.42***	0.66***		−0.42***	−0.035	0.123	0.103	0.047	0.112	−0.109	0.088
PH	−0.51***	−0.56***	−0.57***		0.049	0.023	−0.20**	0.44***	0.27***	0.41***	−0.088
AD	−0.47***	−0.39***	0.07	0.23**		0.20**	0.67***	0.15*	0.033	−0.29***	−0.16*
MC1	0.14	0.1	0.19**	−0.08	0.05		0.24**	0.056	0.081	−0.023	0.111
MC2	−0.07	−0.12	0.23**	−0.11	0.39***	0.40***		−0.052	−0.27***	−0.39***	−0.48***
BY	−0.43***	−0.40***	−0.30***	0.74***	0.33***	−0.03	−0.07		0.81***	0.18*	0.081
GY	−0.26**	−0.16*	−0.19**	0.54***	0.14*	−0.13	−0.43***	0.80***		0.25**	0.58***
TGW	−0.38***	−0.33***	−0.16*	0.39***	0.25**	−0.05	0.04	0.45***	0.33***		0.23**
GS	0.29***	0.28***	0.107	−0.16*	−0.32***	−0.05	−0.41***	−0.11	0.27***	−0.08

Correlation coefficients were calculated from the trait values averaged over two years (2011 and 2012). The numbers below the diagonal are correlation coefficients under normal N treatments and numbers above the diagonal are correlation coefficients under low N treatments. Chl1, Chl2, Chl3, chlorophyll contents (at vegetative, anthesis, and maturity stages); PH, plant height (cm); AD, days to anthesis; MC1, % stover moisture content; MC2, % head moisture content; BY, biomass yield (t. ha⁻¹); GY, grain yield (t. ha⁻¹); TGW, thousand grain weight (g); GS, grain-to-stover ratio (%). ***P < 0.0001; **P < 0.01; *P < 0.05

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