Table 5. Descriptive statistics of phenotypic data for eggshell color intensity traits.

Population	Phenotype	N	Mean	SE	SD	Min	Max
N146	QB1	146	34.37	0.86	10.40	13.63	69.47
	QP2	146	3.86	0.07	0.91	2.17	8.17
	QT3	146	38.23	0.90	10.86	15.80	73.51
N280	QB1	280	11.08	0.15	2.53	5.84	21.41
	QP2	280	4.06	0.08	1.32	1.84	8.75
	QT3	280	15.14	0.21	3.53	8.15	28.69

¹ Quantity of biliverdin (×10⁻⁸ mol/g)

² Quantity of protoporphyrin (×10⁻⁸ mol/g)

³ Total quantity of eggshell pigments (QT = QB + QP) (×10⁻⁸ mol/g). N (number of samples).