Table 5.

Clustering of NORs in the case of sperm cells in which all NORs (recognized as FISH signals) were located only in the M (medial) area of the sperm cell nucleus (M area marked in the scheme in Fig. 1A).

Number of NORs cluster only in M area of nucleus	1	2	3	4 or 5
Carrier	% of sperm cells
R1 rob(13;22)	46.8*	37.4*	15.8*	0.0*
Number of sperm cells with NORs signals only in M = 171 = 43.9% ∑ of all analyzed sperm cells = 390	80/171	64/171	27/171	0/171
R2 rob(13;15)	28.9*	53.9*	17.2*	0.0*
Number of sperm cells with NORs signals only in M = 238 = 60.1% ∑ of all analyzed sperm cells = 398	69/239	129/239	41/239	0/239
R3 rob(13;14)	33.3* a	44.0 b	22.7* c	0.0*
Number of sperm cells with NORs signals only in M = 198 = 56.4% ∑ of all analyzed sperm cells = 351	66/198	87/198	45/198	45/198
Control	18.7	45.3	27.6	8.4
Number of sperm cells with NORs signals only in M = 225 = 47.5% ∑ of all analyzed sperm cells = 474	42/225	102/225	62/225	19/225

One-way ANOVA was used to compare results (p ≤ 0.01 was considered to be statistically significant).

*Values significantly different from Control value (p < 0.01).

^aAll of the values of R1, R2 and R3 were significantly different.

^bAll of the values of R1, R2 and R3 were significantly different.

^cAll of the values of R1, R2 and R3 were significantly different.