. 2017 Mar 3;8:296. doi: 10.3389/fpls.2017.00296

Table 1.

Correlation coefficients (r) between final grain yield (GY) and other plant attributes and canopy biomass (CB) and other plant attributes of RILs of common bean grown under irrigated and drought stress conditions in a Mollisol in Palmira, Colombia.

Plant traits	Canopy biomass (kg ha⁻¹)		Grain yield (kg ha⁻¹)
	Irrigated	Drought	Irrigated	Drought
SPAD chlorophyll meter readings (SCMR)	0.40^***	0.03	0.35^***	0.06
Leaf area index (LAI; m² m⁻²)	0.68^***	0.56^***	0.28^**	0.30^**
Canopy biomass (CB; kg ha⁻¹)	1.00	1.00	0.52^***	0.60^***
Pod harvest index (PHI; %)	0.06	0.20^*	0.44^***	0.49^***
Pod partitioning index (PPI; %)	−0.11	0.18^*	0.15	0.09
Harvest index (HI; %)	−0.38^***	−0.34^***	0.05	0.13
100 seed weight (SW; g)	−0.13	0.14	−0.04	0.22^*
Grain yield (GY; kg ha⁻¹)	0.52^***	0.60^***	1.00	1.00
Shoot TNC (mg g⁻¹)	0.07	0.22^*	0.32^***	0.20^*
Seed TNC (mg g⁻¹)	−0.09	0.19^*	0.08	0.20^*
Pod number per area (PNA)	0.45^***	0.25^**	0.29^**	0.03
Seed number per area (SNA)	0.64^***	0.38^***	0.40^***	0.34^***
Days to maturity (DM)	0.22^*	−0.20^*	0.09	−0.31^***
Visual rooting depth (VRD) at flowering (cm plant⁻¹)	0.02	0.18	−0.02	0.18
Root length at soil depth 0–5 cm (RL0–5; m plant⁻¹)	−0.07	−0.34^***	−0.11	−0.22^*
Root length at soil depth 5–10 cm (RL5–10; m plant⁻¹)	−0.05	−0.03	−0.22^*	0.05
Root length at soil depth 10–20 cm (RL10–20; m plant⁻¹)	0.03	0.11	−0.08	0.17
Root length at soil depth 20–40 cm (RL20–40; m plant⁻¹)	0.09	0.11	−0.01	0.21^*
Root length at soil depth 40–60 cm (RL40–60; m plant⁻¹)	0.11	0.04	−0.02	0.12
Root length at soil depth 60–75 cm (RL60–75; m plant⁻¹)	0.16	0.15	0.01	0.11
Total root length (TRL; m plant⁻¹)	0.09	0.00	−0.07	0.11
Fine root proportion at soil depth 0–5 cm (FRP0-5; %)	−0.18^*	−0.47^***	−0.18	−0.27^**
Fine root proportion at soil depth 5–10 cm (FRP5–10; %)	−0.21^*	−0.35^***	−0.14	−0.11
Fine root proportion at soil depth 10–20 cm (FRP10–20; %)	−0.18	−0.27^**	−0.06	−0.08
Fine root proportion at soil depth 20–40 cm (FRP20–40; %)	−0.14	−0.22^*	−0.04	−0.07
Fine root proportion at soil depth 40–60 cm (FRP40–60; %)	0.03	−0.06	0.22^*	0.08
Fine root proportion at soil depth 60–75 cm (FRP60–75; %)	0.05	0.13	0.03	0.11
Total fine root proportion (TFRP; %)	0.00	−0.04	0.08	0.07

^{*, **, ***}

Significant at the 0.05, 0.01, and 0.001 probability levels, respectively.