. 2021 Apr 16;10(4):871. doi: 10.3390/foods10040871

Table 2.

Egg yolk coloration before and after storage at 4 ± 2 °C for 14 days of laying hens supplemented with sodium selenite, selenium yeast, and bacterial organic source.

Parameters		Dietary Treatments ¹				p-Value	Contrast, p-Value
	Eggs	Con	Na₂SeO₃	Se-Yeast	ADS18		Unsupplemented vs. Supplemented	Inorganic vs. Organic	Se-Yeast vs. ADS18
RYCF	Initial	1.83 ± 0.30	1.83 ± 0.24	2.50 ± 0.29	2.00 ± 0.21	0.2422	0.3641	0.2014	0.1846
	Fresh	2.83 ± 0.30 ^b	2.92 ± 0.26 ^b	3.25 ± 0.18 ^a,b	3.67 ± 0.14 ^a	0.0536	0.0988	0.0591	0.2034
	Stored	2.92 ± 0.26 ^b	2.92 ± 0.36 ^b	3.33 ± 0.26 ^b	4.17 ± 0.21 ^a	0.0072	0.0881	0.0176	0.0382
L*	Initial	57.91 ± 0.33	56.26 ± 0.70	55.78 ± 0.83	56.25 ± 1.07	0.2414	0.0482	0.7916	0.6786
	Fresh	70.79 ± 0.44 ^a	72.22 ± 0.54 ^a	65.05 ± 0.90 ^b	62.83 ± 0.54 ^c	<0.0001	<0.0001	<0.0001	0.0154
	Stored	71.22 ± 0.35 ^a	68.19 ± 0.66 ^b	66.91 ± 0.23 ^b,c	65.43 ± 0.85 ^c	<0.0001	<0.0001	0.0055	0.0721
a*	Initial	1.83 ± 0.11	1.55 ± 0.15	1.75 ± 0.21	1.80 ± 0.18	0.6228	0.5023	0.2628	0.8347
	Fresh	1.11 ± 0.08	1.12 ± 0.14	0.93 ± 0.11	1.09 ± 0.12	0.5954	0.6273	0.436	0.3088
	Stored	0.47 ± 0.06	0.48 ± 0.05	0.55 ± 0.05	0.55 ± 0.06	0.596	0.358	0.3113	0.954
b*	Initial	31.87 ± 0.34	31.83 ± 0.31	32.17 ± 0.19	32.34 ± 0.26	0.5212	0.4614	0.2195	0.6634
	Fresh	45.85 ± 0.30 ^c	46.59 ± 0.36 ^b,c	47.24 ± 0.24 ^b	49.76 ± 0.42 ^a	<0.0001	<0.0001	<0.0001	<0.0001
	Stored	47.63 ± 0.44 ^d	49.15 ± 0.54 ^c	50.68 ± 0.36 ^b	52.26 ± 0.34 ^a	<0.0001	<0.0001	<0.0001	0.011
C*	Initial	31.93 ± 0.33	31.87 ± 0.32	32.23 ± 0.19	32.40 ± 0.27	0.5093	0.4667	0.2061	0.6702
	Fresh	45.87 ± 0.30 ^c	46.60 ± 0.36 ^b,c	47.26 ± 0.24 ^b	49.78 ± 0.42 ^a	<0.0001	<0.0001	<0.0001	<0.0001
	Stored	47.63 ± 0.44 ^d	49.15 ± 0.54 ^c	50.68 ± 0.36 ^b	52.26 ± 0.34 ^a	<0.0001	<0.0001	<0.0001	0.011
H*	Initial	1.51 ± 0.004	1.52 ± 0.005	1.52 ± 0.006	1.52 ± 0.005	0.6022	0.3844	0.3015	0.8866
	Fresh	1.55 ± 0.002	1.55 ± 0.003	1.55 ± 0.002	1.55 ± 0.002	0.5029	0.4224	0.2704	0.4871
	Stored	1.56 ± 0.001	1.56 ± 0.001	1.56 ± 0.001	1.56 ± 0.001	0.8445	0.6146	0.473	0.8356

¹ Con = Control, Na₂SeO₃ = Sodium selenite; Se-yeast = Selenium yeast; ADS18 = Stenotrophomonas maltophilia, ^a–c Mean in the same row with different superscripts are significantly different (p < 0.05); RYCF: Roche Yolk Color Fan; L*: lightness, a*: redness, b*: yellowness, c*: chroma and h*: hue angle.