. 2019 Dec 25;21(1):165. doi: 10.3390/ijms21010165

Table 1.

Heritability, mean, and genetic correlation with grain yield for spectral reflectance indices (SRI) across developmental stage measured for diverse Pacific Northwest winter-wheat lines.

Index ¹	Growth Stage ²	Heritability	Mean	Correlation with Yield ³		Response to Selection ⁴	Correlated Response ⁵	Relative Selection Efficiency ⁶
Index ¹	Growth Stage ²	Heritability	Mean	Phenotypic	Genetic	Response to Selection ⁴	Correlated Response ⁵	Relative Selection Efficiency ⁶
NDRE-1	Hd	0.26	0.75	0.77	0.64	0.05	0.025	0.74
	Gf1	0.63	0.71	0.77	0.65	0.37	0.039	1.17
	Gf2	0.30	0.51	0.86	0.59	0.08	0.024	0.73
NDRE-2	Hd	0.42	0.14	0.78	0.65	0.10	0.032	0.96
	Gf1	0.53	0.13	0.73	0.65	0.12	0.036	1.07
	Gf2	0.30	0.10	0.81	0.58	0.08	0.024	0.72
NDVI	Hd	0.24	0.83	0.75	0.64	0.04	0.024	0.71
	Gf1	0.52	0.80	0.76	0.66	0.07	0.036	1.08
	Gf2	0.37	0.63	0.86	0.58	0.08	0.027	0.80
NWI-1	Hd	0.23	−0.08	−0.63	−0.51	0.04	−0.018	−0.56
	Gf1	0.16	−0.07	−0.61	−0.42	0.02	−0.013	−0.38
	Gf2	0.26	−0.06	−0.88	−0.58	0.06	−0.022	−0.67
SR	Hd	0.41	18.61	0.78	0.67	0.11	0.032	0.97
	Gf1	0.55	15.81	0.66	0.57	0.43	0.031	0.96
	Gf2	0.31	7.24	0.82	0.57	0.07	0.024	0.72

¹NDRE = Normalized Difference Red Edge; NDVI = Normalized Difference Vegetative Index; NWI = Normalized Water Index; SR = Simple Ratio; ² Hd = Heading; Gf1 = Grain fill 1; Gf2 = Grain fill 2; ³ all phenotypic and genetic correlations are significant at p < 0.001; ⁴ response to selection, R = H_xσ_x, where H_x is the square root of heritability for trait x (SRI); σ_x is the genotypic standard deviation for trait x (SRI); ⁵ correlated response, CR = H_xr_gσ_y, where H_x is the square root of heritability for trait x (SRI); r_g is the genetic correlation with grain yield; σ_y is the genotypic standard deviation for yield; a higher CR would result in higher selection efficiency; ⁶ relative selection efficiency, RE = CR_x/R_y, where CR_x is the correlated response of the trait x (SRI) with yield; R_y is the response to selection for yield (equal to 0.033).