Table 2.

Sperm morphology in raw semen of boars fed a diet supplemented with inorganic or organic sources of selenium for 95 d¹,²

	Dietary treatment, 0.3 mg Se/kg		SEM	P-value
	SS, n = 14	OH-SeMet,n = 14		T	W	T * W
Sperm defects, %
Acrosome	1.92	1.92	0.13	0.922	0.239	0.644
Head	1.47	1.23	0.08	0.406	0.143	0.730
Neck	0.07	0.02	0.01	0.124	<0.001	0.406
Middle piece	0.34	0.40	0.03	0.627	0.019	0.375
Proximal droplet	3.62	3.16	0.37	0.296	0.081	0.174
Distal droplet	2.03	1.58	0.12	0.185	0.212	0.182
Tail	19.51	18.27	0.74	0.983	0.009	0.895
Teratological forms	0.15	0.09	0.02	0.970	0.829	0.993
Normal sperm, %	62.53	66.40	1.25	0.880	0.003	0.817

¹Values represent the means and SEM.

²SS, sodium selenite; OH-SeMet, hydroxy-selenomethionine; T, treatment; W, week; T * W, the interaction between treatment and week.