. 2016 Aug 3;7:1131. doi: 10.3389/fpls.2016.01131

Table 3.

Phenotypic correlations between genotype means for the airborne/satellite derived thermal index/NDVI, against the corresponding ground-based CT/NDVI and between the genotypic means for the aerial derived indices and yield/biomass.

Trial	ENV	Variable	Alternative remote sensing approach		Phenotypic correlation between methodologies	Phenotypic correlation with yield			Phenotypic correlation with biomass
			Proximal date	UAV date	Proximal VS. UAV	UAV VS. yield	Proximal VS. yield		UAV VS. biomass	Proximal VS. biomass
Elite OPT	OPT	NDVI	11/3/13	11/3/13	0.78^**	0.36⁺	0.37⁺		0.45^*	0.39^*
			26/3/13	25/3/13	0.79^**	0.29⁺	0.38⁺		0.52^**	0.41^*
Elite HOT 1	HOT	NDVI	15/5/12	11/5/12	0.85^**	0.75^**	0.52^**		0.79^**	0.58^**
		CT	14/5/12	17/5/12	0.78^**	−0.73^**	−0.56^**		−0.78^**	−0.6^**
Elite HOT 2	HOT	NDVI	23/5/14	15/5/14	0.86^**	0.51^**	0.54^**		0.59^**	0.65^**
			1/6/14	3/6/14	0.87^**	0.64^**	0.64^**		0.74^**	0.73^**
		CT	13/5/14	13/5/14	0.36^**	−0.45^**	−0.34^**		−0.56^**	−0.37^**
			15/5/14	15/5/14	0.4^**	−0.57^**	−0.43^**		−0.57^**	−0.49^**
			20/5/14	16/5/14	0.75^**	−0.62^**	−0.48^**		−0.62^**	−0.55^**
Elite DRT	DRT	NDVI	14/2/13	13/2/13	0.41^**	0.56^**	0.1		–	–
			7/3/13	4/3/13	0.80^**	0.42^**	0.27⁺		–	–
		CT	18/2/14	21/2/14	−0.04	−0.41^**	−0.24⁺		–	–
Gen Res DRT	DRT	NDVI	21/2/13	26/2/13	0.72^**	0.16^**	0.25^**		0.62^**	0.46^**
			31/3/13	25/3/13	0.91^**	0.21^**	0.14^*		0.72^**	0.69^**
		CT	7/2/13	22/2/13	0.57^**	−0.44^**	−0.25^**		0.1	0.18⁺
SATELLITE
Trial	ENV	Variable	Proximal date	UAV date	Satellite date	SAT VS. proximal		SAT VS. UAV	SAT VS. yield	SAT VS. biomass
Elite OPT	OPT	NDVI	26/3/13	25/3/13	6/4/13	0.85^**		0.84^**	0.53^**	0.58^**

Also shown are equivalent correlations with ground-based indices.

^{+, *, **}

represent significant levels of 0.1, 0.05, and 0.01 respectively.