Table 4.

The sire identities and the number of half sib offspring analyzed in this study verses the number of animal used two previous studies.

Sire	Number of BSE			Number of control
	This study	[13]	[14]	This study	[13]	[14]
Barold Rock Seal	33	53	43	11	28	22
Brynhyfryd Cascade	68	93	72	28	56	18
Leighton Workboy	71	88	70	40	44	22
Maybar Juniper	90	124	83	51	44	30
Bowerchalk Polacca	4	0	0	6	0	0
Deri cascade	3	0	0	7	0	0
Total	269	358	268	143	172	92