Table 4.

Egg yolk fatty acid composition and cholesterol content of Huoyan geese fed with flaxseed for 56 days ¹

	Flaxseed (%)						Contrast
Items	0	5	10	15	Pooled s.e.m.	P-value	Linear	Quadratic
Fatty acid composition (g/100 g of total fatty acid)
Palmitic (C16:0)	33.20a	30.41b	30.95b	29.53b	0.50	0.04	0.05	0.67
Stearic (C18:0)	9.87	10.24	10.08	10.29	0.27	0.21	0.26	0.31
Palmitoleic (C16:1n-7)	0.41	0.53	0.72	0.54	0.01	0.38	0.87	0.32
Oleic (C18:1n-9)	41.89	41.37	40.45	40.10	1.42	0.26	0.67	0.40
Linoleic (C18:2n-6)	9.88	10.12	9.94	9.85	0.87	0.78	0.42	0.89
α-Linolenic acid (18:3n-3)	0.89d	2.78c	3.91b	4.86a	0.25	<0.01	<0.01	0.91
Arachidonic (C20:4n-6)	3.12	3.09	2.10	2.09	0.05	0.45	0.10	0.52
EPA (C20:5n-3)	0.10d	0.73c	0.98b	0.89a	0.01	0.01	<0.01	0.70
DPA (C22:5n-3)	0.82a	0.00b	0.00b	0.00b	<0.01	0.02	0.35	0.53
DHA (C22:6n-3)	0.41b	1.36a	0.89ab	1.21a	0.03	0.01	0.31	0.03
Σ SFA 2	43.19a	40.81b	41.17ab	39.92b	1.09	0.04	0.04	0.12
Σ MUFA 3	42.51	41.89	41.18	41.14	1.91	0.65	0.46	0.41
Σ PUFA 4	14.40c	17.89a	17.01b	18.39a	0.65	0.01	0.04	0.40
Σ n-6 PUFA	13.17	13.41	12.34	12.13	0.89	0.33	0.27	0.77
Σ n-3 PUFA	1.57c	4.17b	4.91b	6.06a	0.31	<0.01	<0.01	0.32
n-6/n-3 PUFA ratio	8.39a	3.23b	2.51c	2.00c	0.19	<0.01	<0.01	0.87
Total cholesterol (mg/dl)	187.86a	185.13a	176.87b	147.89c	1.39	<0.01	0.01	0.78

^a,b,c Means in the same row not followed by the same superscript letter are significantly different at P<0.05.

¹ n=9 replicate pens/treatments, 3 goslings/pen.

² Σ SFA (saturated fatty acid)=14:0+15:0+16:0 +18:0+20:0+22:0+24:0.

³ Σ MUFA (monounsaturated fatty acid)=14:1+16:1n-7+18:1n-9+20:1n-9.

⁴ Σ PUFA (polyunsaturated fatty acid)=18:2n-6+18:3n-3+20:4n-6+20:5n-3+22:5n-6+22:5n-3.