Table 7.

Effects of different concentrations of cysteamine, ergothioneine, and serine supplementation of diluent on fertility obtained with frozen-thawed chicken semen.

Factor		No. of fertile eggs	No. of incubated eggs	Fertility (% fertile/incubated eggs)
Control	0	338	398	84.69 ± 5.11b
Cysteamine (mmol)	0.001	261	384	67.89 ± 4.49d,e
	0.002	276	396	69.86 ± 5.65d
	0.004	241	377	63.84 ± 4.37e
Ergothioneine (mmol)	0.01	259	390	66.27 ± 4.18d,e
	0.02	242	369	65.52 ± 3.34d,e
	0.04	256	382	66.78 ± 3.74d,e
Serine (mmol)	2	316	394	80.01 ± 5.26c
	4	356	391	90.91 ± 3.81a
	6	311	381	81.40 ± 5.61b,c

The results are expressed as means ± standard deviations. N = 10. Different letters (^a–e) within columns indicate significant differences (P < 0.05).