Influence of milking frequency on genetic parameters associated with the milk production in the first and second lactations of Iranian Holstein dairy cows using random regression test day models

Damane, Moslem Moghbeli; Fozi, Masood Asadi; Mehrgardi, Ahmad Ayatollahi

doi:10.1186/s40781-016-0087-3

Journal of Animal Science and Technology

Table 6 Estimates of genetic (below diagonal) and phenotypic (above diagonal) correlations between milk yield on selected days in milk (DIM) for different milking frequency in the first and second lactations

From: Influence of milking frequency on genetic parameters associated with the milk production in the first and second lactations of Iranian Holstein dairy cows using random regression test day models

MF^a Lactation and DIM
MF^a Lactation and DIM	35	65	95	125	155	185	215	245	275	305
3X First
35	-	0.34	0.29	0.27	0.23	0.19	0.17	0.18	0.19	0.10
65	0.19	-	0.59	0.51	0.46	0.47	0.47	0.43	0.38	0.40
95	0.14	0.87	-	0.62	0.57	0.55	0.52	0.50	0.46	0.41
125	0.17	0.67	0.94	-	0.64	0.60	0.56	0.53	0.50	0.42
155	0.07	0.74	0.95	0.97	-	0.66	0.62	0.56	0.51	0.49
185	−0.09	0.86	0.94	0.87	0.95	-	0.70	0.63	0.55	0.59
225	−0.18	0.89	0.94	0.81	0.88	0.97	-	0.69	0.63	0.63
245	−0.14	0.76	0.92	0.82	0.80	0.83	0.91	-	0.73	0.62
275	0.03	0.54	0.80	0.81	0.72	0.65	0.71	0.92	-	0.63
305	0.02	0.76	0.72	0.64	0.75	0.84	0.80	0.63	0.53	-
3X Second
35	-	0.51	0.43	0.38	0.35	0.33	0.31	0.29	0.27	0.22
65	0.52	-	0.58	0.55	0.51	0.44	0.38	0.32	0.27	0.23
95	0.29	0.96	-	0.65	0.61	0.55	0.46	0.39	0.32	0.26
125	0.32	0.90	0.97	-	0.68	0.63	0.56	0.48	0.40	0.30
155	0.45	0.73	0.79	0.92	-	0.70	0.66	0.59	0.50	0.36
185	0.53	0.47	0.50	0.70	0.92	-	0.73	0.69	0.60	0.44
225	0.54	0.27	0.28	0.50	0.80	0.97	-	0.75	0.69	0.52
245	0.51	0.18	0.18	0.41	0.73	0.93	0.99	-	0.76	0.63
275	0.43	0.20	0.23	0.44	0.73	0.91	0.96	0.98	-	0.75
305	0.17	0.37	0.46	0.60	0.72	0.74	0.71	0.73	0.85	-
4X First
35	-	0.26	0.19	0.24	0.25	0.20	0.14	0.14	0.17	0.04
65	−0.71	-	0.67	0.55	0.49	0.51	0.50	0.45	0.33	0.37
95	−0.57	0.90	-	0.68	0.62	0.61	0.58	0.54	0.45	0.43
125	−0.18	0.67	0.90	-	0.71	0.68	0.61	0.58	0.52	0.45
155	0.02	0.61	0.82	0.97	-	0.71	0.65	0.61	0.54	0.48
185	−0.01	0.75	0.83	0.90	0.95	-	0.73	0.68	0.58	0.55
225	−0.11	0.85	0.84	0.81	0.86	0.96	-	0.73	0.63	0.59
245	−0.09	0.75	0.80	0.79	0.80	0.86	0.94	-	0.74	0.63
275	0.00	0.47	0.68	0.79	0.76	0.72	0.75	0.91	-	0.67
305	−0.41	0.67	0.74	0.72	0.73	0.77	0.73	0.61	0.55	-
4X Second
35	-	0.49	0.47	0.45	0.35	0.24	0.20	0.26	0.32	0.17
65	0.40	-	0.67	0.60	0.54	0.49	0.45	0.39	0.31	0.30
95	0.36	0.87	-	0.71	0.65	0.57	0.50	0.44	0.38	0.32
125	0.31	0.61	0.91	-	0.73	0.64	0.56	0.52	0.47	0.37
155	0.14	0.57	0.86	0.95	-	0.71	0.66	0.61	0.54	0.45
185	−0.04	0.63	0.72	0.70	0.87	-	0.76	0.71	0.60	0.55
225	0.01	0.63	0.61	0.53	0.72	0.96	-	0.80	0.69	0.63
245	0.27	0.55	0.56	0.55	0.70	0.86	0.93	-	0.80	0.69
275	0.41	0.32	0.46	0.59	0.69	0.71	0.75	0.93	-	0.74
305	−0.29	0.17	0.29	0.42	0.73	0.97	0.97	0.88	0.73	-

^aMilking frequency

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ISSN: 2055-0391

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