Table 1.

Descriptive statistics of eggshell quality traits along with aging process

Traits	N	Mean	SD	CV (%)	Min	Max	h2(SE)
EST36	2,919	0.2834	0.02	7.04%	0.2130	0.3800	0.26 (0.03)
EST46	843	0.2964	0.02	8.34%	0.2130	0.3870	0.26 (0.06)
EST55	2,800	0.2821	0.02	7.16%	0.2300	0.3850	0.23 (0.03)
EST66	2,667	0.2837	0.02	8.03%	0.2127	0.3970	0.21 (0.03)
EST72	2,597	0.2832	0.02	8.55%	0.2270	0.4030	0.17 (0.02)
EST80	2,478	0.2838	0.02	8.13%	0.2130	0.3830	0.08 (0.02)
EST90	2,287	0.2873	0.02	7.47%	0.2370	0.4000	0.11 (0.02)
ESS36	2,907	3.530	0.66	18.73%	1.078	5.616	0.32 (0.03)
ESS46	843	3.455	0.46	13.20%	1.516	5.033	0.18 (0.05)
ESS55	2,786	3.413	0.70	20.43%	1.013	6.826	0.22 (0.03)
ESS72	2,574	3.269	0.68	20.66%	1.009	5.593	0.22 (0.03)
ESS80	2,432	2.982	0.65	21.94%	1.013	5.276	0.22 (0.03)
ESS90	2,243	2.861	0.69	23.63%	1.004	5.779	0.15 (0.03)
ESC36	2,919	58.81	3.39	5.77%	45.5	78.21	0.37 (0.03)
ESC46	843	57.58	2.79	4.84%	45.34	74.81	0.30 (0.06)
ESC55	2,802	60.13	3.56	5.93%	49.36	80.28	0.44 (0.03)
ESC66	2,674	59.64	3.67	6.16%	47.51	81.24	0.38 (0.03)
ESC72	2,611	60.81	3.80	6.25%	46.83	77.40	0.44 (0.03)
ESC80	2,482	60.24	3.90	6.47%	48.79	81.67	0.40 (0.03)
ESC90	2,295	58.45	4.22	7.22%	45.65	80.47	0.34 (0.03)
ESG36	2,918	3.224	0.65	20.26%	1.230	5.820	0.30 (0.03)
ESG46	843	3.115	0.61	19.59%	1.570	5.380	0.33 (0.06)
ESG55	2,801	2.392	0.55	22.82%	1.260	5.380	0.43 (0.03)
ESG66	2,671	2.494	0.66	25.89%	1.260	5.650	0.31 (0.03)
ESG72	2,611	2.606	0.59	22.76%	1.360	5.580	0.39 (0.03)
ESG80	2,479	2.484	0.59	23.93%	1.310	7.010	0.30 (0.03)
ESG90	2,294	2.550	0.53	20.92%	1.320	4.710	0.08 (0.02)

Abbreviations: EST, eggshell thickness; ESS, eggshell strength; ESC, eggshell color; ESG, eggshell gloss. Numbers represent the age in wk. N, number of samples. Mean, average value. SD, standard deviation. CV (%), coefficient of variation. Min, minimum value. Max, maximum value. h²(SE), SNP-based heritability (standard error).