Table 4.

Results from QTL mapping and test for Mendelian segregation on individual parents at the QTL peak position (32 cM).

Family	Parent	Survival rate	TPS-HK (LRT)	TDS-Cox (LRT)	MENDEL (X2)
1	sire	0.56	8.09**	6.65**	0.00
1	dam1	0.63	0.79	0.50	1.60
1	dam2	0.50	0.16	0.32	6.74**
2	sire	0.52	1.01	0.24	0.00
2	dam1	0.60	3.44	2.05	-
2	dam2	0.44	4.44*	2.22	0.23
3	sire	0.48	0.21	0.31	13.13**
3	dam1	0.53	0.00	0.09	0.90
3	dam2	0.44	8.03**	6.63*	3.79
4	sire	0.49	3.65	6.68**	3.10
4	dam1	0.49	0.15	0.65	1.26
5	sire	0.30	0.44	0.00	0.01
5	dam1	0.42	10.52**	6.73**	0.64
5	dam2	0.18	0.01	0.65	0.00
6	sire	0.41	3.80	3.63	0.01
6	dam1	0.33	3.78	2.91	0.10
6	dam2	0.49	1.35	0.75	1.26
7	sire	0.51	7.88**	6.30*	0.12
7	dam1	0.55	2.17	1.21	0.03
7	dam2	0.48	1.48	1.74	2.63
8	sire	0.51	0.15	0.12	2.25
8	dam1	0.58	1.15	2.12	0.24
8	dam2	0.39	2.18	2.23	0.03
9	sire	0.50	0.00	0.12	1.26
9	dam1	0.50	0.97	2.23	0.03
10	sire	0.56	1.21	1.71	0.03
10	dam1	0.56	0.03	0.00	0.03
11	sire	0.41	0.70	0.35	3.10
11	dam1	0.41	1.09	0.15	0.23
12	sire	0.56	0.01	0.00	0.00
12	dam1	0.78	1.09	0.93	0.68
12	dam2	0.35	1.28	1.08	1.32
13	sire	0.29	1.60	1.65	0.12
13	dam1	0.26	0.98	0.14	8.53**
13	dam2	0.33	0.05	1.08	0.03
14	sire	0.58	0.48	0.04	0.11
14	dam1	0.58	1.27	0.81	0.11
15	sire	0.55	0.77	0.56	2.92
15	dam1	0.74	0.71	0.68	0.00
15	dam2	0.36	0.19	0.01	5.77*
16	sire	0.39	0.22	0.27	0.00
16	dam1	0.39	0.00	0.16	4.24*
17	sire	0.28	0.00	0.01	0.23
17	dam1	0.28	0.20	0.11	0.03

The tests for QTL mapping are Likelihood Ratio Tests, distributed approximately as χ² with one degree of freedom. The test for Mendelian segregation is a Pearson's goodness-of-fit test, distributed approximately as χ² with one degree of freedom. Survival rate = survival rate among offspring of that parent; TDS = Test-Day Survival; TPS = Test-Period Survival. The Mendel tests were done at marker BHMS177, alternatively BHMS553 or BHMS130 when BHMS177 was not informative. The significance levels are nominal.

*P < 0.05

**P < 0.01